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grd2kml.c
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/*--------------------------------------------------------------------
*
* Copyright (c) 1991-2025 by the GMT Team (https://www.generic-mapping-tools.org/team.html)
* See LICENSE.TXT file for copying and redistribution conditions.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; version 3 or any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* Contact info: www.generic-mapping-tools.org
*--------------------------------------------------------------------*/
/*
* Author: Paul Wessel
* Date: 8-NOV-2017
* Version: 6 API
*
* Brief synopsis: grd2kml reads a single grid and makes a Google Earth
* image quadtree. Optionally, supply an intensity grid (or auto-derive it)
* and a CPT (or use default table), and request a contour overlay.
* If contours are not requested we can write the PNG tiles directly without
* going via a PostScript plot.
*/
#include "gmt_dev.h"
#include "longopt/grd2kml_inc.h"
#define THIS_MODULE_CLASSIC_NAME "grd2kml"
#define THIS_MODULE_MODERN_NAME "grd2kml"
#define THIS_MODULE_LIB "core"
#define THIS_MODULE_PURPOSE "Create KML image quadtree from single grid"
#define THIS_MODULE_KEYS "<G{,CC(,IG(,WD("
#define THIS_MODULE_NEEDS ""
#define THIS_MODULE_OPTIONS "-Vfn"
/* Note: If -n is given here it is automatically set in any module called below, such as grdimage */
struct GRD2KML_CTRL {
struct GRD2KM_In {
bool active;
char *file;
} In;
struct GRD2KML_A { /* -Ag|s|a[<altitude>] [g] */
bool active;
int mode;
double altitude;
} A;
struct GRD2KML_C { /* -C<cpt> or -C<color1>,<color2>[,<color3>,...][+i<dz>] */
bool active;
double dz;
char *file;
} C;
struct GRD2KML_D { /* -D[+s][+d] [DEBUG ONLY, NOT DOCUMENTED] */
bool active;
bool single;
bool dump;
} D;
struct GRD2KML_E { /* -E<url> */
bool active;
char *url;
} E;
struct GRD2KML_F { /* -F<filter> */
bool active;
char filter;
} F;
struct GRD2KML_H { /* -H<scale> */
bool active;
int factor;
} H;
struct GRD2KML_N { /* -N<prefix> */
bool active;
char *prefix;
} N;
struct GRD2KML_I { /* -I[<intensfile>|<value>|<modifiers>] */
bool active;
bool constant;
bool derive;
double value;
char *azimuth; /* Default azimuth(s) for shading */
char *file;
char *method; /* Default scaling method */
} I;
struct GRD2KML_L { /* -L<size> */
bool active;
unsigned int size;
} L;
struct GRD2KML_S { /* -S[n] */
bool active;
unsigned int extra;
} S;
struct GRD2KML_T { /* -T<title> */
bool active;
char *title;
} T;
struct GRD2KML_W { /* -W<contour_file> */
bool active;
char *file;
double scale; /* Scaling of pen width modifier */
double cutoff; /* Ignore contours whose pen is < this width in points */
} W;
};
/* Structure used to keep track of which tile and its 4 possible underlings */
struct GMT_QUADTREE {
unsigned int level, q, type;
unsigned int row, col;
char tag[16];
char *region;
double wesn[4];
struct GMT_QUADTREE *next[4];
};
static void *New_Ctrl (struct GMT_CTRL *GMT) { /* Allocate and initialize a new control structure */
struct GRD2KML_CTRL *C;
C = gmt_M_memory (GMT, NULL, 1, struct GRD2KML_CTRL);
/* Initialize values whose defaults are not 0/false/NULL */
C->F.filter = 'g';
C->I.method = strdup ("t1"); /* Default normalization for shading when -I is used */
C->L.size = 512; /* Default tile size unless global grids [360] */
C->W.scale = M_SQRT2;
C->W.cutoff = 0.1;
return (C);
}
static void Free_Ctrl (struct GMT_CTRL *GMT, struct GRD2KML_CTRL *C) { /* Deallocate control structure */
if (!C) return;
gmt_M_str_free (C->In.file);
gmt_M_str_free (C->C.file);
gmt_M_str_free (C->N.prefix);
gmt_M_str_free (C->I.file);
gmt_M_str_free (C->I.azimuth);
gmt_M_str_free (C->I.method);
gmt_M_str_free (C->T.title);
gmt_M_str_free (C->W.file);
gmt_M_free (GMT, C);
}
static int usage (struct GMTAPI_CTRL *API, int level) {
const char *name = gmt_show_name_and_purpose (API, THIS_MODULE_LIB, THIS_MODULE_CLASSIC_NAME, THIS_MODULE_PURPOSE);
if (level == GMT_MODULE_PURPOSE) return (GMT_NOERROR);
GMT_Usage (API, 0, "usage: %s %s -N<name> [-Aa|g|s[<altitude>]] [-C%s] [-E<url>] [-F<filter>] "
"[-H<scale>] [-I[<intensgrid>|<value>|<modifiers>]] [-L<size>] [-S[<extra>]] [-T<title>] [%s] "
"[-W<contfile>|<pen>[+s<scl>/<limit>]] [%s] [%s] [%s]\n", name, GMT_INGRID, CPT_OPT_ARGS, GMT_V_OPT, GMT_f_OPT, GMT_n_OPT, GMT_PAR_OPT);
if (level == GMT_SYNOPSIS) return (GMT_MODULE_SYNOPSIS);
GMT_Message (API, GMT_TIME_NONE, " REQUIRED ARGUMENTS:\n");
GMT_Usage (API, 1, "\n<grid>");
gmt_ingrid_syntax (API, 0, "Name of grid to be plotted");
GMT_Usage (API, -2, "Note: Grid z-values are in user units and will be "
"converted to colors via the CPT [%s].", API->GMT->current.setting.cpt);
GMT_Usage (API, 1, "\n-N<name>");
GMT_Usage (API, -2, "Set file name prefix for image directory and KML file. If the directory "
"already exists we will overwrite the files.");
GMT_Message (API, GMT_TIME_NONE, "\n OPTIONAL ARGUMENTS:\n");
GMT_Usage (API, 1, "\n-Aa|g|s[<altitude>]");
GMT_Usage (API, -2, "Altitude mode of the image layer, choose among three modes:");
GMT_Usage (API, 3, "a: Absolute altitude.");
GMT_Usage (API, 3, "g: Altitude relative to sea surface or ground.");
GMT_Usage (API, 3, "s: Altitude relative to sea floor or ground.");
GMT_Usage (API, -2, "Optionally, append fixed <altitude> [g0: Clamped to sea surface or ground].");
gmt_explain_cpt_input (API, 'C');
GMT_Usage (API, 1, "\n-E<url>");
GMT_Usage (API, -2, "To store all files remotely, give leading URL [local files only].");
GMT_Usage (API, 1, "\n-F<filter>");
GMT_Usage (API, -2, "Specify filter type used for down-sampling (width is set automatically):");
GMT_Usage (API, 3, "b: Boxcar - simple averaging of all points inside filter domain.");
GMT_Usage (API, 3, "c: Cosine arch - weighted averaging with cosine arc weights.");
GMT_Usage (API, 3, "g: Gaussian - weighted averaging with Gaussian weights [Default].");
GMT_Usage (API, 3, "m: Median - median (50%% quantile) value of all points.");
GMT_Usage (API, 1, "\n-H<scale>");
GMT_Usage (API, -2, "Do sub-pixel smoothing using factor <scale> [no sub-pixel smoothing]. Ignored if -W not set.");
GMT_Usage (API, 1, "\n-I[<intensgrid>|<value>|<modifiers>]");
GMT_Usage (API, -2, "Apply directional illumination. Append name of intensity grid file. "
" For a constant intensity (i.e., change the ambient light), append a single value. "
"To derive intensities from <grid> instead, use -I+d to accept the default values (see grdgradient for details) or be specific:");
GMT_Usage (API, 3, "+a Append <azimuth> of illumination [-45]");
GMT_Usage (API, 3, "+n Append <method> pf intensity calculation [t1]");
GMT_Usage (API, 1, "\n-L<size>");
GMT_Usage (API, -2, "Set tile size as a power of 2 [512; for global grids, we instead select 360].n");
GMT_Usage (API, 1, "\n-S[<extra>]");
GMT_Usage (API, -2, "Add extra interpolated levels [no extra layers].");
GMT_Usage (API, 1, "\n-T<title>");
GMT_Usage (API, -2, "Set title (document description) for the top-level KML.");
GMT_Option (API, "V");
GMT_Usage (API, 1, "\n-W<contfile>|<pen>[+s<scl>/<limit>]");
GMT_Usage (API, -2, "Give file with select contours and pens to overlay contours [no contours]. "
"If no file is given we assume it is a <pen> and to use the contours implied by the CPT file. "
"Pen widths apply at final tile resolution and are reduced by <scl> [1.1412] for each lower level. "
"If a contour's scaled width is less than <limit> [0.1] it will not be drawn.");
GMT_Option (API, "f,n,.");
return (GMT_MODULE_USAGE);
}
static int parse (struct GMT_CTRL *GMT, struct GRD2KML_CTRL *Ctrl, struct GMT_OPTION *options) {
/* This parses the options provided to grdcut and sets parameters in CTRL.
* Any GMT common options will override values set previously by other commands.
* It also replaces any file names specified as input or output with the data ID
* returned when registering these sources/destinations with the API.
*/
unsigned int n_errors = 0;
char *c = NULL;
struct GMT_OPTION *opt = NULL;
struct GMTAPI_CTRL *API = GMT->parent;
for (opt = options; opt; opt = opt->next) { /* Process all the options given */
switch (opt->option) {
/* Common parameters */
case '<': /* Input files */
n_errors += gmt_M_repeated_module_option (API, Ctrl->In.active);
n_errors += gmt_get_required_file (GMT, opt->arg, opt->option, 0, GMT_IS_GRID, GMT_IN, GMT_FILE_REMOTE, &(Ctrl->In.file));
break;
/* Processes program-specific parameters */
case 'A': /* Altitude mode */
n_errors += gmt_M_repeated_module_option (API, Ctrl->A.active);
switch (opt->arg[0]) {
case 'g': Ctrl->A.mode = 0; break;
case 's': Ctrl->A.mode = 1; break;
case 'a': Ctrl->A.mode = 2; break;
default:
GMT_Report (API, GMT_MSG_ERROR, "Option -A: Append either a(bsolute), g(round) or s(eafloor) with optional <altitude>.\n");
n_errors++;
break;
}
if (opt->arg[1]) Ctrl->A.altitude = atof (&opt->arg[1]);
break;
case 'C': /* CPT */
n_errors += gmt_M_repeated_module_option (API, Ctrl->C.active);
gmt_M_str_free (Ctrl->C.file);
if (opt->arg[0]) Ctrl->C.file = strdup (opt->arg);
gmt_cpt_interval_modifier (GMT, &(Ctrl->C.file), &(Ctrl->C.dz));
break;
case 'D': /* Debug options - may fade away when happy with the performance */
n_errors += gmt_M_repeated_module_option (API, Ctrl->D.active);
if (strstr (opt->arg, "+s")) Ctrl->D.single = true; /* Write all files in a single directory instead of one directory per level */
if (strstr (opt->arg, "+d")) Ctrl->D.dump = true; /* Dump quadtree information to stdout */
break;
case 'E': /* Remove URL for all contents but top driver kml */
n_errors += gmt_M_repeated_module_option (API, Ctrl->E.active);
gmt_M_str_free (Ctrl->E.url);
Ctrl->E.url = strdup (opt->arg);
break;
case 'F': /* Select filter type */
n_errors += gmt_M_repeated_module_option (API, Ctrl->F.active);
n_errors += gmt_get_required_char (GMT, opt->arg, opt->option, 0, &Ctrl->F.filter);
if (strchr ("bcgm", Ctrl->F.filter) == NULL) {
GMT_Report (API, GMT_MSG_ERROR, "Option -F: Choose among b, c, g, m!\n");
n_errors++;
}
break;
case 'H': /* RIP at a higher dpi, then downsample in gs */
n_errors += gmt_M_repeated_module_option (API, Ctrl->H.active);
n_errors += gmt_get_required_int (GMT, opt->arg, opt->option, 0, &Ctrl->H.factor);
break;
case 'I': /* Here, intensity must be a grid file since we need to filter it */
n_errors += gmt_M_repeated_module_option (API, Ctrl->I.active);
if (!strcmp (opt->arg, "+d")) /* Gave +d only, so derive intensities from input grid using default settings */
Ctrl->I.derive = true;
else if ((c = gmt_first_modifier (GMT, opt->arg, "an"))) { /* Want to control how grdgradient is run */
unsigned int pos = 0;
char p[GMT_BUFSIZ] = {""};
Ctrl->I.derive = true;
while (gmt_getmodopt (GMT, 'I', c, "an", &pos, p, &n_errors) && n_errors == 0) {
switch (p[0]) {
case 'a': gmt_M_str_free (Ctrl->I.azimuth); Ctrl->I.azimuth = strdup (&p[1]); break;
case 'n': gmt_M_str_free (Ctrl->I.method); Ctrl->I.method = strdup (&p[1]); break;
default: break; /* These are caught in gmt_getmodopt so break is just for Coverity */
}
}
}
else if (!opt->arg[0] || strstr (opt->arg, "+")) /* No argument or just +, so derive intensities from input grid using default settings */
Ctrl->I.derive = true;
else if (!gmt_access (GMT, opt->arg, R_OK)) /* Got a file */
Ctrl->I.file = strdup (opt->arg);
else if (gmt_M_file_is_remote (opt->arg)) /* Got a remote file */
Ctrl->I.file = strdup (opt->arg);
else if (opt->arg[0] && !gmt_not_numeric (GMT, opt->arg)) { /* Looks like a constant value */
Ctrl->I.value = atof (opt->arg);
Ctrl->I.constant = true;
}
else {
GMT_Report (API, GMT_MSG_ERROR, "Option -I: Requires a valid grid file or a constant\n");
n_errors++;
}
break;
case 'L': /* Tiles sizes */
n_errors += gmt_M_repeated_module_option (API, Ctrl->L.active);
n_errors += gmt_get_required_uint (GMT, opt->arg, opt->option, 0, &Ctrl->L.size);
Ctrl->L.size = atoi (opt->arg);
break;
case 'N': /* File name prefix */
n_errors += gmt_M_repeated_module_option (API, Ctrl->N.active);
gmt_M_str_free (Ctrl->N.prefix);
n_errors += gmt_get_required_string (GMT, opt->arg, opt->option, 0, &Ctrl->N.prefix);
break;
case 'Q': /* Deprecated colormasking option */
GMT_Report (API, GMT_MSG_ERROR, "Option -Q is deprecated as transparency is automatically detected\n");
break;
case 'S': /* Extra levels */
n_errors += gmt_M_repeated_module_option (API, Ctrl->S.active);
Ctrl->S.extra = (opt->arg[0]) ? atoi (opt->arg) : 1;
break;
case 'T': /* Title */
n_errors += gmt_M_repeated_module_option (API, Ctrl->T.active);
if (opt->arg[0]) Ctrl->T.title = strdup (opt->arg);
break;
case 'W': /* Contours and pens */
n_errors += gmt_M_repeated_module_option (API, Ctrl->W.active);
if ((c = strstr (opt->arg, "+s"))) { /* Gave +s<scl> modifier to scale pen widths given via -C and optional cutoff pen width */
sscanf (&c[2], "%lf/%lg", &Ctrl->W.scale, &Ctrl->W.cutoff);
c[0] = '\0'; /* Temporarily chop off the modifier */
}
if (opt->arg[0]) {
gmt_M_str_free (Ctrl->W.file);
Ctrl->W.file = strdup (opt->arg);
}
if (c) c[0] = '+'; /* Restore */
break;
default: /* Report bad options */
n_errors += gmt_default_option_error (GMT, opt);
break;
}
}
n_errors += gmt_M_check_condition (GMT, !Ctrl->In.active, "Must specify a single grid file\n");
n_errors += gmt_M_check_condition (GMT, Ctrl->N.prefix == NULL, "Option -N: Must specify a prefix for naming usage.\n");
n_errors += gmt_M_check_condition (GMT, Ctrl->H.active && Ctrl->H.factor <= 1, "Option -H: Must specify an integer factor > 1.\n");
n_errors += gmt_M_check_condition (GMT, Ctrl->E.active && Ctrl->E.url == NULL, "Option -E: Must specify an URL.\n");
n_errors += gmt_M_check_condition (GMT, Ctrl->I.active && !Ctrl->I.constant && !Ctrl->I.file && !Ctrl->I.derive,
"Option -I: Must specify intensity file, value, or modifiers\n");
return (n_errors ? GMT_PARSE_ERROR : GMT_NOERROR);
}
GMT_LOCAL int grd2kml_find_quad_above (struct GMT_QUADTREE **Q, unsigned int n, unsigned int row, unsigned int col, unsigned int level) {
/* Finds the quad entry that matches the row, col, level args */
unsigned int k;
for (k = 0; k < n; k++) {
if (Q[k]->level != level) continue;
if (Q[k]->row != row) continue;
if (Q[k]->col != col) continue;
return (int)k;
}
return -1; /* Very bad */
}
GMT_LOCAL void grd2kml_set_dirpath (bool single, char *url, char *prefix, unsigned int level, int dir, char *string) {
if (single) { /* Write everything into the prefix dir */
if (url && level == 0) /* Set the leading URL for zero-level first kml */
sprintf (string, "%s/%s/L%2.2d", url, prefix, level);
else /* Everything below is in same folder */
sprintf (string, "L%2.2d", level);
}
else { /* Write to separate level directories */
if (url && level == 0) /* Set the leading URL for zero-level first kml */
sprintf (string, "%s/%s/%2.2d/", url, prefix, level);
else if (dir == -1) /* Need to refer to another directory at same level as this one */
sprintf (string, "../%2.2d/", level);
else if (dir == 0) /* At current dir */
string[0] = '\0';
else /* Down in a dir */
sprintf (string, "%2.2d/", level);
}
}
GMT_LOCAL void grd2kml_halve_dimensions (double *inc, double *step) {
/* We MUST use division by two since it is a quadtree */
*step /= 2;
*inc /= 2;
}
GMT_LOCAL unsigned int grd2kml_max_level (struct GMT_CTRL *GMT, bool global, struct GMT_GRID_HEADER *H, unsigned int size, unsigned int extra) {
unsigned int level = 0;
if (global) {
unsigned int n = 1, f = 1, go = 1;
double inc = 1.0, step = 360, range;
GMT_Report (GMT->parent, GMT_MSG_NOTICE, "Level = %2.2d tile size = %gd grid inc = %gm n_tiles = %d\n", level, step, 60*inc, n);
f = 2;
do {
step /= f; inc /= f;
n *= f;
range = n * H->inc[GMT_X] * 360;
if (range >= (360.0-GMT_CONV6_LIMIT))
go = 0;
level++;
GMT_Report (GMT->parent, GMT_MSG_NOTICE, "Level = %2.2d tile size = %gd grid inc = %gm n_tiles = %d\n", level, step, 60*inc, n);
} while (go);
while (extra) { /* Add the extra levels */
step /= f; inc /= f;
n *= f;
level++;
GMT_Report (GMT->parent, GMT_MSG_NOTICE, "Level = %2.2d tile size = %gd grid inc = %gm n_tiles = %d\n", level, step, 60*inc, n);
extra--;
}
}
else {
unsigned int mx, my;
mx = urint (ceil ((double)H->n_columns / (double)size)) * size; /* Nearest image size in multiples of tile size */
my = urint (ceil ((double)H->n_rows / (double)size)) * size;
level = urint (ceil (log2 (MAX (mx, my) / (double)size))) + extra; /* Number of levels in the quadtree plus optional extra levels */
}
return level;
}
GMT_LOCAL void grd2kml_assert_tile_size (struct GMT_CTRL *GMT, bool global, bool active, unsigned int *size) {
/* For global grids we select tile size of 360 given the 360-degree range of the file, else we use radix-2.
* We only change size if -L was not given, else we warn if the size is not ideal. */
if (global) { /* 360 degree range in longitude and <= 180 degree range in latitude */
if (active && *size != 360)
GMT_Report (GMT->parent, GMT_MSG_WARNING, "Option -L: For global grids the tile size should ideally be 360; your size %d is not.\n", *size);
else if (!active) {
*size = 360;
GMT_Report (GMT->parent, GMT_MSG_WARNING, "Option -L: For global grids we select a tile size of %d\n", *size);
}
}
else { /* A smaller region, so strictly radix 2 size */
if (active && fabs (log2 ((double)(*size)) - irint (log2 ((double)(*size)))) > GMT_CONV8_LIMIT)
GMT_Report (GMT->parent, GMT_MSG_WARNING, "Option -L: Should ideally be radix 2; your size %d is not.\n", *size);
}
GMT_Report (GMT->parent, GMT_MSG_INFORMATION, "Final tile size is %d.\n", *size);
}
int grd2kml_coarsen_grid (struct GMT_CTRL *GMT, unsigned int level, char filter, unsigned int registration, double orig_inc, double inc, char *DataGrid, char *Zgrid, char *filt_report) {
char s_int[GMT_LEN32] = {""}, fwidth[GMT_LEN32] = {""};
char cmd[GMT_LEN256] = {""};
int error;
double f;
/* We will filter the grid to make a coarser version that exactly matches the Ctrl->L.size expectations.
* Note: If the desired increment is smaller than the actual, we must sample the grid instead.
* Note: If gridline-registered we scale filter width by sqrt(2) but rounded up a bit to make sure
* it extends to the 4 corner nodes. */
GMT_Report (GMT->parent, GMT_MSG_INFORMATION, "Level %d: Low-pass-filtering the grid(s)\n", level);
f = (registration == GMT_GRID_NODE_REG) ? 1e-4*ceil (1e4*M_SQRT2) : 1.0; /* Round up a bit */
sprintf (fwidth, "%.8g", f * inc);
sprintf (s_int, "%.16g", inc);
if (inc < orig_inc) { /* Resample original instead of filtering it down */
sprintf (filt_report, " [Resampled with -I%s]", s_int);
sprintf (cmd, "%s -I%s -rp -G%s", DataGrid, s_int, Zgrid);
GMT_Report (GMT->parent, GMT_MSG_INFORMATION, "Running grdsample : %s\n", cmd);
if ((error = GMT_Call_Module (GMT->parent, "grdsample", GMT_MODULE_CMD, cmd)) != GMT_NOERROR)
return (GMT_RUNTIME_ERROR);
}
else { /* Filter the grid */
unsigned int k = 0;
char *kind[4] = {"Boxcar", "Cosine-taper", "Gaussian", "Median"};
switch (filter) {
case 'b': k = 0; break;
case 'c': k = 1; break;
case 'g': k = 2; break;
case 'm': k = 3; break;
}
sprintf (filt_report, " [%s filtered with -F%c%s -I%s]", kind[k], filter, fwidth, s_int);
sprintf (cmd, "%s -D0 -fc -F%c%s -I%s -rp -G%s", DataGrid, filter, fwidth, s_int, Zgrid);
GMT_Report (GMT->parent, GMT_MSG_INFORMATION, "Running grdfilter : %s\n", cmd);
if ((error = GMT_Call_Module (GMT->parent, "grdfilter", GMT_MODULE_CMD, cmd)) != GMT_NOERROR)
return (GMT_RUNTIME_ERROR);
}
return (GMT_NOERROR);
}
#define bailout(code) {gmt_M_free_options (mode); return (code);}
#define Return(code) {Free_Ctrl (GMT, Ctrl); gmt_end_module (GMT, GMT_cpy); bailout (code);}
EXTERN_MSC int GMT_grd2kml (void *V_API, int mode, void *args) {
bool use_tile = false, z_extend = false, i_extend = false, tmp_cpt = false, global_lon, adjust = false;
int error = 0, kk, uniq, i_dir, dir, minLodPixels, maxLodPixels;
unsigned int level, max_level, dpi = 100, n = 0, k, nx, ny, row, col, n_skip, quad, im_type;
unsigned int n_NaN, n_NM, n_alloc = GMT_CHUNK, n_bummer = 0, n_tiles = 0, n_img[2] = {0,0};
unsigned int registration;
uint64_t node;
double factor = 2.0, dim, step, wesn[4], ext_wesn[4], inc;
char cmd[GMT_BUFSIZ] = {""}, level_dir[PATH_MAX] = {""}, Zgrid[PATH_MAX] = {""}, Igrid[PATH_MAX] = {""};
char W[GMT_LEN16] = {""}, E[GMT_LEN16] = {""}, S[GMT_LEN16] = {""}, N[GMT_LEN16] = {""}, file[PATH_MAX] = {""};
char DataGrid[PATH_MAX] = {""}, IntensGrid[PATH_MAX] = {""}, path[PATH_MAX] = {""}, filt_report[GMT_LEN128] = {""};
char region[GMT_LEN128] = {""}, ps_cmd[GMT_LEN128] = {""}, contour_file[GMT_VF_LEN] = {""}, K[4] = {""};
char box[GMT_LEN32] = {""}, grdimage[GMT_LEN256] = {""}, grdcontour[GMT_LEN256] = {""}, scalepen_arg[GMT_LEN32] = {""};
static char *kml_xmlns = "<kml xmlns=\"http://www.opengis.net/kml/2.2\" xmlns:gx=\"http://www.google.com/kml/ext/2.2\" xmlns:kml=\"http://www.opengis.net/kml/2.2\" xmlns:atom=\"http://www.w3.org/2005/Atom\">";
static char *alt_mode[3] = {"relativeToGround", "relativeToSeaFloor", "absolute"};
static char *ext[2] = {"jpg", "png"}, img_code[2] = {'j', 'G'}, *transp = " -Q";
FILE *fp = NULL;
struct GMT_DATASET *C = NULL;
struct GMT_QUADTREE **Q = NULL;
struct GRD2KML_CTRL *Ctrl = NULL;
struct GMT_GRID *G = NULL, *T = NULL, *I = NULL;
struct GMT_CTRL *GMT = NULL, *GMT_cpy = NULL;
struct GMT_OPTION *options = NULL;
struct GMTAPI_CTRL *API = gmt_get_api_ptr (V_API); /* Cast from void to GMTAPI_CTRL pointer */
/*----------------------- Standard module initialization and parsing ----------------------*/
if (API == NULL) return (GMT_NOT_A_SESSION);
if (mode == GMT_MODULE_PURPOSE) return (usage (API, GMT_MODULE_PURPOSE)); /* Return the purpose of program */
options = GMT_Create_Options (API, mode, args); if (API->error) return (API->error); /* Set or get option list */
if ((error = gmt_report_usage (API, options, 0, usage)) != GMT_NOERROR) bailout (error); /* Give usage if requested */
/* Parse the command-line arguments */
if ((GMT = gmt_init_module (API, THIS_MODULE_LIB, THIS_MODULE_CLASSIC_NAME, THIS_MODULE_KEYS, THIS_MODULE_NEEDS, module_kw, &options, &GMT_cpy)) == NULL) bailout (API->error); /* Save current state */
if (GMT_Parse_Common (API, THIS_MODULE_OPTIONS, options)) Return (API->error);
Ctrl = New_Ctrl (GMT); /* Allocate and initialize a new control structure */
if ((error = parse (GMT, Ctrl, options)) != 0) Return (error);
/*---------------------------- This is the grd2kml main code ----------------------------*/
gmt_grd_set_datapadding (GMT, true); /* Turn on gridpadding when reading a subset */
uniq = (int)getpid(); /* Unique number for temporary files */
/* Read grid header only to determine dimensions and required levels for the Pyramid */
if ((G = GMT_Read_Data (API, GMT_IS_GRID, GMT_IS_FILE, GMT_IS_SURFACE, GMT_CONTAINER_ONLY, NULL, Ctrl->In.file, NULL)) == NULL) {
Return (API->error);
}
if (!gmt_M_is_geographic (GMT, GMT_IN)) {
GMT_Report (GMT->parent, GMT_MSG_ERROR, "Grid must be geographic (lon, lat)\n");
Return (GMT_RUNTIME_ERROR);
}
if (!gmt_M_grd_equal_xy_inc (GMT, G)) {
GMT_Report (GMT->parent, GMT_MSG_ERROR, "Grid spacing must be the same in longitude and latitude!\n");
Return (GMT_RUNTIME_ERROR);
}
global_lon = gmt_M_360_range (G->header->wesn[XLO], G->header->wesn[XHI]);
if (!global_lon && G->header->registration == GMT_GRID_NODE_REG) {
/* It is better to have a pixel-registered grid for tiling so that we can use the highest resolution exactly at the highest level.
* We will convert input to a fake pixel grid by extending its domain by half the increments. No resampling takes place here. */
GMT_Destroy_Data (API, &G); /* Delete previous grid struct */
sprintf (file, "%s/grd2kml_pixeldata_tmp_%6.6d.grd", API->tmp_dir, uniq);
sprintf (cmd, "%s -T -G%s", Ctrl->In.file, file); /* Toggle registration */
GMT_Report (API, GMT_MSG_INFORMATION, "Convert data grid to pixel orientation\n");
if ((error = GMT_Call_Module (API, "grdedit", GMT_MODULE_CMD, cmd)) != GMT_NOERROR) {
Return (GMT_RUNTIME_ERROR);
}
adjust = true; /* Since may need to do the same for an intensity grid */
gmt_M_str_free (Ctrl->In.file);
Ctrl->In.file = strdup (file);
if ((G = GMT_Read_Data (API, GMT_IS_GRID, GMT_IS_FILE, GMT_IS_SURFACE, GMT_CONTAINER_ONLY, NULL, Ctrl->In.file, NULL)) == NULL) {
Return (API->error);
}
}
grd2kml_assert_tile_size (GMT, global_lon, Ctrl->L.active, &Ctrl->L.size); /* Set or comment on tile size */
max_level = grd2kml_max_level (GMT, global_lon, G->header, Ctrl->L.size, Ctrl->S.extra);
nx = G->header->n_columns; ny = (global_lon) ? nx : G->header->n_rows; /* Dimensions of original grid, possibly made square for global grids */
dim = dpi * 0.0001 * Ctrl->L.size; /* Constant tile map size in inches for a fixed dpi of 100 yields PNGS of the requested dimension in -L */
/* Create the container quadtree directory first */
if (gmt_mkdir (Ctrl->N.prefix))
GMT_Report (API, GMT_MSG_INFORMATION, "Directory %s already exist - will overwrite files\n", Ctrl->N.prefix);
if (Ctrl->I.derive) { /* Auto-create single intensity grid from (possibly pixel-reregistered) data grid to ensure constant scaling */
sprintf (file, "%s/grd2kml_intensity_tmp_%6.6d.grd", API->tmp_dir, uniq);
Ctrl->I.file = strdup (file);
GMT_Report (API, GMT_MSG_INFORMATION, "Derive an intensity grid from data grid\n");
/* Prepare the grdgradient arguments using selected -A -N and the data region in effect */
sprintf (cmd, "%s -G%s -A%s -N%s --GMT_HISTORY=readonly", Ctrl->In.file, Ctrl->I.file, Ctrl->I.azimuth, Ctrl->I.method);
/* Call the grdgradient module */
GMT_Report (API, GMT_MSG_INFORMATION, "Calling grdgradient with args %s\n", cmd);
if (GMT_Call_Module (API, "grdgradient", GMT_MODULE_CMD, cmd))
Return (API->error);
}
else if (Ctrl->I.file) { /* Can read the intensity file and compare region etc. to data grid */
struct GMT_GRID *I = NULL;
double x_noise = GMT_CONV4_LIMIT * G->header->inc[GMT_X], y_noise = GMT_CONV4_LIMIT * G->header->inc[GMT_Y];
if (adjust) { /* Also make intensity grid pixel-registered */
sprintf (file, "%s/grd2kml_pixelintens_tmp_%6.6d.grd", API->tmp_dir, uniq);
sprintf (cmd, "%s -T -G%s", Ctrl->I.file, file);
GMT_Report (API, GMT_MSG_INFORMATION, "Convert intensity grid to pixel orientation\n");
if ((error = GMT_Call_Module (API, "grdedit", GMT_MODULE_CMD, cmd)) != GMT_NOERROR) {
Return (GMT_RUNTIME_ERROR);
}
gmt_M_str_free (Ctrl->I.file);
Ctrl->I.file = strdup (file);
}
if ((I = GMT_Read_Data (API, GMT_IS_GRID, GMT_IS_FILE, GMT_IS_SURFACE, GMT_CONTAINER_ONLY, NULL, Ctrl->I.file, NULL)) == NULL) {
Return (API->error);
}
if (!gmt_M_grd_same_shape (GMT, G, I)) {
GMT_Report (API, GMT_MSG_ERROR, "Data grid and intensity grid are not of the same dimensions!\n");
Return (GMT_RUNTIME_ERROR);
}
if (fabs (G->header->wesn[XLO] - I->header->wesn[XLO]) > x_noise || fabs (G->header->wesn[XHI] - I->header->wesn[XHI]) > x_noise ||
fabs (G->header->wesn[YLO] - I->header->wesn[YLO]) > y_noise || fabs (G->header->wesn[YHI] - I->header->wesn[YHI]) > y_noise) {
GMT_Report (API, GMT_MSG_ERROR, "Data grid and intensity grid do not cover the same area!\n");
Return (GMT_RUNTIME_ERROR);
}
GMT_Destroy_Data (API, &I);
}
Q = gmt_M_memory (GMT, NULL, n_alloc, struct GMT_QUADTREE *);
/* Determine extended region required if using the largest multiple of original grid spacing */
registration = G->header->registration;
if (global_lon) { /* Make it a square 360x360 grid so the quadtree splitting works */
ext_wesn[XLO] = G->header->wesn[XLO];
ext_wesn[XHI] = G->header->wesn[XHI];
ext_wesn[YLO] = -180.0;
ext_wesn[YHI] = +180.0;
step = 360.0; /* Initial single tile is 360x360 degrees with increment 1 degree */
inc = 1.0;
}
else { /* Make a square Ctrl->size region centered on the input grid center */
double tile_size = Ctrl->L.size * G->header->inc[GMT_X]; /* Dimension of highest-resolution tile in degrees */
unsigned int width;
width = pow (2.0, max_level); /* Radix-2 number of the smallest tiles in both x and y */
step = width * tile_size; /* Square dimension of extended grid in degrees */
col = G->header->n_columns / 2; row = G->header->n_rows / 2; /* Half-way point in grid */
/* Extend the grid half-step away from the approximate center of the input grid */
ext_wesn[XLO] = gmt_M_grd_col_to_x (GMT, col, G->header);
if (registration == GMT_GRID_PIXEL_REG) ext_wesn[XLO] -= 0.5 * G->header->inc[GMT_X]; /* Must adjust since we don't want node location but cell boundary */
ext_wesn[XLO] -= step / 2;
ext_wesn[XHI] = ext_wesn[XLO] + step;
ext_wesn[YLO] = gmt_M_grd_row_to_y (GMT, row, G->header);
if (registration == GMT_GRID_PIXEL_REG) ext_wesn[YLO] -= 0.5 * G->header->inc[GMT_Y]; /* Must adjust since we don't want node location but cell boundary */
ext_wesn[YLO] -= step / 2;
ext_wesn[YHI] = ext_wesn[YLO] + step;
inc = step / Ctrl->L.size;
nx = ny = width * Ctrl->L.size;
}
if (ext_wesn[XLO] < G->header->wesn[XLO] || ext_wesn[XHI] > G->header->wesn[XHI] || ext_wesn[YLO] < G->header->wesn[YLO] || ext_wesn[YHI] > G->header->wesn[YHI]) {
/* Extend the original grid with NaNs so it is an exact multiple of largest grid stride at max level */
sprintf (DataGrid, "%s/grd2kml_extended_data_%6.6d.grd", API->tmp_dir, uniq);
sprintf (cmd, "%s -R%.16g/%.16g/%.16g/%.16g -N -G%s", Ctrl->In.file, ext_wesn[XLO], ext_wesn[XHI], ext_wesn[YLO], ext_wesn[YHI], DataGrid);
GMT_Report (API, GMT_MSG_INFORMATION, "Extend original data grid to multiple of largest grid spacing\n");
if ((error = GMT_Call_Module (API, "grdcut", GMT_MODULE_CMD, cmd)) != GMT_NOERROR) {
error = GMT_RUNTIME_ERROR; goto end_times;
}
z_extend = true; /* We made a temp file we need to zap later */
if (Ctrl->I.active) { /* Also extend the intensity grid */
sprintf (IntensGrid, "%s/grd2kml_extended_intens_%6.6d.grd", API->tmp_dir, uniq);
sprintf (cmd, "%s -R%.16g/%.16g/%.16g/%.16g -N -G%s", Ctrl->I.file, ext_wesn[XLO], ext_wesn[XHI], ext_wesn[YLO], ext_wesn[YHI], IntensGrid);
GMT_Report (API, GMT_MSG_INFORMATION, "Extend intensity grid to multiple of largest grid spacing\n");
if ((error = GMT_Call_Module (API, "grdcut", GMT_MODULE_CMD, cmd)) != GMT_NOERROR) {
error = GMT_RUNTIME_ERROR; goto end_times;
}
i_extend = true; /* We made a temp file we need to zap later */
}
if (ext_wesn[YLO] < -90.0 || ext_wesn[YHI] > 90.0) gmt_grd_set_cartesian (GMT, G->header, 2); /* We must treat the extended grid as Cartesian since exceeding latitude bounds */
}
else { /* No need to extend, use the input files as is */
strcpy (DataGrid, Ctrl->In.file);
if (Ctrl->I.active)
strcpy (IntensGrid, Ctrl->I.file);
}
if (!Ctrl->C.active || gmt_is_cpt_master (GMT, Ctrl->C.file)) { /* If no cpt given or just a master then we must compute a scaled one from the full-size grid and use it throughout */
char *cpt = gmt_cpt_default (API, Ctrl->C.file, Ctrl->In.file, G->header);
char cptfile[PATH_MAX] = {""};
struct GMT_PALETTE *P = NULL;
if ((P = gmt_get_palette (GMT, cpt, GMT_CPT_OPTIONAL, G->header->z_min, G->header->z_max, Ctrl->C.dz)) == NULL) {
GMT_Report (API, GMT_MSG_ERROR, "Failed to create a CPT\n");
error = API->error; goto end_times; /* Well, that did not go well... */
}
if (cpt) gmt_M_str_free (cpt);
sprintf (cptfile, "%s/grd2kml_%d.cpt", API->tmp_dir, uniq);
if (GMT_Write_Data (API, GMT_IS_PALETTE, GMT_IS_FILE, GMT_IS_NONE, GMT_WRITE_NORMAL, NULL, cptfile, P) != GMT_NOERROR) {
error = API->error; goto end_times; /* Well, that did not go well... */
}
Ctrl->C.active = tmp_cpt = true;
Ctrl->C.file = strdup (cptfile);
}
if (Ctrl->W.active) { /* Want to overlay contours given via file */
/* Contour file has records of <cvalue> [<angle>] C|A [<pen>]. With angle = 0 we want <cvalue> C <pen> records */
uint64_t c;
char line[GMT_LEN256] = {""};
struct GMT_DATASEGMENT *S = NULL;
if (!gmt_access (GMT, Ctrl->W.file, F_OK)) { /* Was given an actual file */
gmt_set_cartesian (GMT, GMT_IN);
if ((error = GMT_Set_Columns (API, GMT_IN, 1, GMT_COL_FIX)) != GMT_NOERROR) {
GMT_Report (API, GMT_MSG_ERROR, "Unable to specify number of columns (1) to read\n");
error = GMT_RUNTIME_ERROR; goto end_times;
}
if ((C = GMT_Read_Data (API, GMT_IS_DATASET, GMT_IS_FILE, GMT_IS_NONE, GMT_READ_NORMAL, NULL, Ctrl->W.file, NULL)) == NULL) {
error = GMT_RUNTIME_ERROR; goto end_times;
}
if (C->n_segments > 1 || C->n_records == 0 || C->table[0]->segment[0]->text == NULL) {
GMT_Report (API, GMT_MSG_ERROR, "Contour file has more than one segment, no records at all, or no text\n");
error = GMT_RUNTIME_ERROR; goto end_times;
}
S = C->table[0]->segment[0];
for (c = 0; c < C->n_records; c++) { /* Must reformat the records to fit grdcontour requirements */
if (S->text[c] == NULL) {
GMT_Report (API, GMT_MSG_ERROR, "No text record found\n");
error = GMT_RUNTIME_ERROR; goto end_times;
}
sprintf (line, "C %s", S->text[c]); /* Build the required record format for grdcontour */
gmt_M_str_free (S->text[c]); /* Free previous string */
S->text[c] = strdup (line); /* Update string */
}
}
else { /* Use contours from CPT file, with -W<pen> */
struct GMT_PALETTE *P = NULL;
uint64_t dim_c[4] = {1, 1, 0, 1};
if ((P = GMT_Read_Data (API, GMT_IS_PALETTE, GMT_IS_FILE, GMT_IS_NONE, GMT_READ_NORMAL, NULL, Ctrl->C.file, NULL)) == NULL) {
gmt_M_free (GMT, Q);
Return (API->error);
}
dim_c[GMT_ROW] = P->n_colors + 1; /* Number of contours implied by CPT */
if ((C = GMT_Create_Data (API, GMT_IS_DATASET, GMT_IS_NONE, GMT_WITH_STRINGS, dim_c, NULL, NULL, 0, 0, NULL)) == NULL) {
error = GMT_RUNTIME_ERROR; goto end_times;
}
S = C->table[0]->segment[0];
sprintf (line, "C %s", Ctrl->W.file); /* Build the required record format for grdcontour */
for (c = 0; c < P->n_colors; c++) { /* Do all the low boundaries */
S->data[GMT_X][c] = P->data[c].z_low;
gmt_M_str_free (S->text[c]); /* Free previous string */
S->text[c] = strdup (line); /* Update string */
}
S->data[GMT_X][c] = P->data[P->n_colors-1].z_high;
gmt_M_str_free (S->text[c]); /* Free previous string */
S->text[c] = strdup (line); /* Update string */
}
if (GMT_Open_VirtualFile (API, GMT_IS_DATASET, GMT_IS_NONE, GMT_IN|GMT_IS_REFERENCE, C, contour_file) != GMT_NOERROR) {
GMT_Report (API, GMT_MSG_ERROR, "Unable to create virtual file for contours\n");
error = GMT_RUNTIME_ERROR; goto end_times;
}
strcpy (K, " -K"); /* Since now we must do a contour overlay */
}
/* Set up the constant parts of the grdimage command */
sprintf (grdimage, "-JX%3.2lfi -X0 -Y0%s -W -Ve --PS_MEDIA=%3.2lfix%3.2lfi", dim, K, dim, dim);
if (Ctrl->C.active) { strcat (grdimage, " -C"); strcat (grdimage, Ctrl->C.file); }
/* Set up the constant parts of the grdcontour command */
if (Ctrl->W.active) /* Overlay contours */
sprintf (grdcontour, "-JX%3.2lfi -O -C%s -Ve", dim, contour_file);
if (Ctrl->H.active) /* Do sub-pixel smoothing */
sprintf (ps_cmd, "-E100 -P -Ve -Z -H%d", Ctrl->H.factor);
else
sprintf (ps_cmd, "-E100 -P -Ve -Z");
GMT_Report (GMT->parent, GMT_MSG_NOTICE, "Extended grid size is by %d by %d, tile size is %d x %d\n", ny, nx, Ctrl->L.size, Ctrl->L.size);
n_NM = Ctrl->L.size * Ctrl->L.size; /* Number of nodes or pixels in a tile */
/* Loop over all the levels, starting at the top level (0) */
for (level = 0; level <= max_level; level++) {
GMT_Report (GMT->parent, GMT_MSG_INFORMATION, "Level %d: Factor = %g Dim = %d x %d -> %d x %d\n",
level, factor, irint (factor * Ctrl->L.size), irint (factor * Ctrl->L.size), Ctrl->L.size, Ctrl->L.size);
/* Create the level directory */
if (!Ctrl->D.single) {
sprintf (level_dir, "%s/%2.2d", Ctrl->N.prefix, level);
if (gmt_mkdir (level_dir))
GMT_Report (API, GMT_MSG_INFORMATION, "Level directory %s already exist - overwriting files\n", level_dir);
}
if (level < max_level || registration == GMT_GRID_NODE_REG || !doubleAlmostEqual (inc, G->header->inc[GMT_X])) { /* Filter the data to match level resolution */
sprintf (Zgrid, "%s/grd2kml_Z_L%d_tmp_%6.6d.grd", API->tmp_dir, level, uniq);
if (grd2kml_coarsen_grid (GMT, level, Ctrl->F.filter, registration, G->header->inc[GMT_X], inc, DataGrid, Zgrid, filt_report)) {
error = GMT_RUNTIME_ERROR; goto end_times;
}
if (Ctrl->I.active) { /* Also filter the intensity grid */
sprintf (Igrid, "%s/grd2kml_I_L%d_tmp_%6.6d.grd", API->tmp_dir, level, uniq);
if (grd2kml_coarsen_grid (GMT, level, Ctrl->F.filter, registration, G->header->inc[GMT_X], inc, IntensGrid, Igrid, filt_report)) {
error = GMT_RUNTIME_ERROR; goto end_times;
}
}
}
else { /* Use as is for the highest resolution */
sprintf (filt_report, " [Original grid used]");
strcpy (Zgrid, DataGrid);
step = Ctrl->L.size * G->header->inc[GMT_X];
if (Ctrl->I.active) strcpy (Igrid, IntensGrid);
}
/* Loop over all rows at this level */
row = col = n_skip = 0;
wesn[YLO] = ext_wesn[YLO];
gmt_ascii_format_one (GMT, S, wesn[YLO], GMT_IS_FLOAT);
if (Ctrl->W.active) { /* Set pen width scale and overall cutoff pen size [0.1] in points */
double p = pow (Ctrl->W.scale, -(double)(max_level - level));
sprintf (scalepen_arg, " -W+s%g/%g", p, Ctrl->W.cutoff);
}
while (wesn[YLO] < (G->header->wesn[YHI]-G->header->inc[GMT_Y])) { /* Small correction to avoid issues due to round-off */
wesn[YHI] = wesn[YLO] + step; /* Top row may extend beyond grid and be transparent */
gmt_ascii_format_one (GMT, N, wesn[YHI], GMT_IS_FLOAT); /* GMT_IS_FLOAT and not GMT_IS_LAT since we may exceed 90 */
if (wesn[YHI] <= G->header->wesn[YLO] || wesn[YLO] >= G->header->wesn[YHI]) { /* Tile row outside data range */
row++; /* Onwards to next row */
wesn[YLO] = wesn[YHI];
strcpy (S, N);
n_skip++;
continue;
}
/* Loop over all columns at this level */
col = 0;
wesn[XLO] = ext_wesn[XLO];
gmt_ascii_format_one (GMT, W, wesn[XLO], GMT_IS_FLOAT);
while (wesn[XLO] < (G->header->wesn[XHI]-G->header->inc[GMT_X])) { /* Small correction to avoid issues due to round-off */
unsigned int trow, tcol;
wesn[XHI] = wesn[XLO] + step; /* So right column may extend beyond grid and be transparent */
gmt_ascii_format_one (GMT, E, wesn[XHI], GMT_IS_FLOAT);
if (wesn[XHI] <= G->header->wesn[XLO] || wesn[XLO] >= G->header->wesn[XHI]) { /* Tile outside x data range */
col++; /* Onwards to next column */
wesn[XLO] = wesn[XHI];
strcpy (W, E);
n_skip++;
continue;
}
/* Now we have the current tile region */
if ((T = GMT_Read_Data (API, GMT_IS_GRID, GMT_IS_FILE, GMT_IS_SURFACE, GMT_CONTAINER_AND_DATA, wesn, Zgrid, NULL)) == NULL) {
GMT_Report (API, GMT_MSG_ERROR, "Unable to read in grid tile!\n");
error = GMT_RUNTIME_ERROR; goto end_times;
}
/* Determine if we have any non-NaN data points inside this grid */
for (trow = n_NaN = 0; trow < T->header->n_rows; trow++) {
for (tcol = 0; tcol < T->header->n_columns; tcol++) {
node = gmt_M_ijp (T->header, trow, tcol);
if (gmt_M_is_fnan (T->data[node])) n_NaN++;
}
}
use_tile = (n_NaN < n_NM);
im_type = (n_NaN) ? 1 : 0;
if (use_tile) { /* Found data inside this tile, make plot and rasterize (if PostScript) */
char z_data[GMT_VF_LEN] = {""}, i_data[GMT_VF_LEN] = {""}, psfile[PATH_MAX] = {""};
if (Ctrl->I.active) { /* Also get the intensity tile */
if ((I = GMT_Read_Data (API, GMT_IS_GRID, GMT_IS_FILE, GMT_IS_SURFACE, GMT_CONTAINER_AND_DATA, wesn, Igrid, NULL)) == NULL) {
GMT_Report (API, GMT_MSG_ERROR, "Unable to read in intensity tile!\n");
error = GMT_RUNTIME_ERROR; goto end_times;
}
/* Open the intensity subset as a virtual file we can pass to grdimage */
if (GMT_Open_VirtualFile (API, GMT_IS_GRID, GMT_IS_SURFACE, GMT_IN|GMT_IS_REFERENCE, I, i_data) == GMT_NOTSET) {
GMT_Report (API, GMT_MSG_ERROR, "Unable to open intensity tile as virtual file!\n");
error = GMT_RUNTIME_ERROR; goto end_times;
}
}
/* Open the grid subset as a virtual file we can pass to grdimage */
if (GMT_Open_VirtualFile (API, GMT_IS_GRID, GMT_IS_SURFACE, GMT_IN|GMT_IS_REFERENCE, T, z_data) == GMT_NOTSET) {
GMT_Report (API, GMT_MSG_ERROR, "Unable to open grid tile as virtual file!\n");
error = GMT_RUNTIME_ERROR; goto end_times;
}
/* Will pass -W so grdimage will notify us if there was no valid image data imaged */
if (!Ctrl->W.active) {
/* Build the grdimage command to write an image directly via GDAL - no need to go via PostScript */
char imagefile[PATH_MAX] = {""};
if (Ctrl->D.single)
sprintf (imagefile, "%s/L%2.2dR%3.3dC%3.3d.%s", Ctrl->N.prefix, level, row, col, ext[im_type]);
else
sprintf (imagefile, "%s/R%3.3dC%3.3d.%s", level_dir, row, col, ext[im_type]);
if (Ctrl->I.active) /* Must pass two grids */
sprintf (cmd, "%s %s -I%s -R%s/%s/%s/%s -A%s", grdimage, z_data, i_data, W, E, S, N, imagefile);
else
sprintf (cmd, "%s %s -R%s/%s/%s/%s -A%s", grdimage, z_data, W, E, S, N, imagefile);
if (im_type) strcat (cmd, transp);
error = GMT_Call_Module (API, "grdimage", GMT_MODULE_CMD, cmd);
if (!(error == GMT_NOERROR || error == GMT_IMAGE_NO_DATA)) {
GMT_Report (API, GMT_MSG_ERROR, "Unable to create a direct PNG from grid\n");
error = GMT_RUNTIME_ERROR; goto end_times;
}
}
else {
/* Build the grdimage command to make the PostScript plot */
sprintf (psfile, "%s/grd2kml_tile_tmp_%6.6d.ps", API->tmp_dir, uniq);
if (Ctrl->I.active) /* Must pass two grids */
sprintf (cmd, "%s %s -I%s -R%s/%s/%s/%s ->%s", grdimage, z_data, i_data, W, E, S, N, psfile);
else
sprintf (cmd, "%s %s -R%s/%s/%s/%s ->%s", grdimage, z_data, W, E, S, N, psfile);
if (im_type) strcat (cmd, transp);
error = GMT_Call_Module (API, "grdimage", GMT_MODULE_CMD, cmd);
if (error == GMT_NOERROR && Ctrl->W.active) { /* Overlay contours */
sprintf (cmd, "%s %s -R%s/%s/%s/%s %s ->>%s", grdcontour, z_data, W, E, S, N, scalepen_arg, psfile);
GMT_Init_VirtualFile (API, 0, z_data); /* Read the same grid again */
GMT_Init_VirtualFile (API, 0, contour_file); /* Read the same contours again */
if ((error = GMT_Call_Module (API, "grdcontour", GMT_MODULE_CMD, cmd))) {
GMT_Report (API, GMT_MSG_ERROR, "Unable to overlay contours!\n");
error = GMT_RUNTIME_ERROR; goto end_times;
}
}
}
/* Relinquish the tile memory */
GMT_Close_VirtualFile (API, z_data);
if (GMT_Destroy_Data (API, &T) != GMT_NOERROR) {
GMT_Report (API, GMT_MSG_ERROR, "Unable to free memory of grid tile!\n");
error = GMT_RUNTIME_ERROR; goto end_times;
}
if (Ctrl->I.active) { /* Same for intensity tile */
GMT_Close_VirtualFile (API, i_data);
if (GMT_Destroy_Data (API, &I) != GMT_NOERROR) {
GMT_Report (API, GMT_MSG_ERROR, "Unable to free memory of intensity tile!\n");
error = GMT_RUNTIME_ERROR; goto end_times;
}
}
if (error == GMT_IMAGE_NO_DATA) { /* Must have found non-NaNs in the pad since the image is all NaN? */
GMT_Report (API, GMT_MSG_WARNING, "No image content for current tile (%d, %d, %d) - skipped\n", level, row, col);
gmt_remove_file (GMT, psfile);
n_bummer++;
}
else { /* Made a meaningful plot, time to rip. */
/* Create the psconvert command to convert the PS to transparent PNG */
sprintf (region, "%s/%s/%s/%s", W, E, S, N);
GMT_Report (GMT->parent, GMT_MSG_INFORMATION, "Level %2.2d: Mapped tile %s\n", level, region);
if (Ctrl->W.active) { /* Make PS, now rasterize to PNG */
if (Ctrl->D.single)
sprintf (cmd, "%s -T%c -D%s -FL%2.2dR%3.3dC%3.3d %s", ps_cmd, img_code[im_type], Ctrl->N.prefix, level, row, col, psfile);
else
sprintf (cmd, "%s -T%c -D%s -FR%3.3dC%3.3d %s", ps_cmd, img_code[im_type], level_dir, row, col, psfile);
if (GMT_Call_Module (API, "psconvert", GMT_MODULE_CMD, cmd)) {
GMT_Report (API, GMT_MSG_ERROR, "Unable to rasterize current PNG tile!\n");
error = GMT_RUNTIME_ERROR; goto end_times;
}
}
/* Update our list of tiles created */
Q[n] = gmt_M_memory (GMT, NULL, 1, struct GMT_QUADTREE);
Q[n]->row = row; Q[n]->col = col; Q[n]->level = level; Q[n]->type = im_type;
Q[n]->wesn[XLO] = wesn[XLO]; Q[n]->wesn[XHI] = wesn[XHI];
Q[n]->wesn[YLO] = wesn[YLO]; Q[n]->wesn[YHI] = wesn[YHI];
sprintf (Q[n]->tag, "L%2.2dR%3.3dC%3.3d", level, row, col);
Q[n]->region = strdup (region);
if (++n == n_alloc) { /* Extend the array */
n_alloc <<= 1;
Q = gmt_M_memory (GMT, Q, n_alloc, struct GMT_QUADTREE *);
}
n_img[im_type]++;
}
}
else { /* Just NaNs inside this tile */
GMT_Report (API, GMT_MSG_INFORMATION, "Level %2.2d: Tile %s/%s/%s/%s had no data - skipped\n", level, W, E, S, N);
n_skip++;
}
col++; /* Onwards to next column */
wesn[XLO] = wesn[XHI];
strcpy (W, E);
}
row++; /* Onwards to next row */
wesn[YLO] = wesn[YHI];
strcpy (S, N);
}
if (step > 1)
sprintf (box, "%g x %g d", step, step);
else
sprintf (box, "%g x %g m", 60*step, 60*step);
GMT_Report (GMT->parent, GMT_MSG_NOTICE, "Level %2.2d: Tile size: %18s Tiles: %3d by %3d = %5d %5d mapped %3d empty%s\n", level, box, row, col, row*col, row*col - n_skip, n_skip, filt_report);
if (level < max_level) { /* Delete the temporary filtered grid(s) */
gmt_remove_file (GMT, Zgrid);
if (Ctrl->I.active) gmt_remove_file (GMT, Igrid);
}
grd2kml_halve_dimensions (&inc, &step);
}
n_tiles = n;
if (n_bummer)
GMT_Report (GMT->parent, GMT_MSG_DEBUG, "Found %d tiles that passed the no-NaN test but gave a blank image (?)\n", n_bummer);
/* Clean up any temporary files */
if (z_extend && !access (DataGrid, F_OK))
gmt_remove_file (GMT, DataGrid);
if (i_extend && !access (IntensGrid, F_OK))
gmt_remove_file (GMT, IntensGrid);
if (Ctrl->I.derive)
gmt_remove_file (GMT, Ctrl->I.file);
if (tmp_cpt)
gmt_remove_file (GMT, Ctrl->C.file);
/* Process quadtree links */
GMT_Report (GMT->parent, GMT_MSG_INFORMATION, "Processes quadtree links for %d tiles.\n", n);
Q = gmt_M_memory (GMT, Q, n, struct GMT_QUADTREE *); /* Final size */
for (level = max_level; level > 0; level--) {
for (k = 0; k < n; k++) {
if (Q[k]->level != level) continue; /* Only deal with this level here */
/* Determine the parent tile and the quad (0-3) we belong to */
/* This is the parent row and col since we increase by a factor of 2 each time */
row = Q[k]->row / 2; col = Q[k]->col / 2;
/* The quad is given by comparing the high and low values of row, col */
quad = 2 * (Q[k]->row - 2 * row) + (Q[k]->col - 2 * col);
kk = grd2kml_find_quad_above (Q, n, row, col, level-1); /* kk is the parent of k */
if (kk < 0) { /* THis can happen when the lower-level tile grazes one above it but there really are no data involved */
GMT_Report (GMT->parent, GMT_MSG_INFORMATION, "Tile %s: Unable to link tile for row = %d, col = %d at level %d to a parent (!?). Probably empty - skipped.\n", Q[k]->tag, row, col, level);
GMT_Report (GMT->parent, GMT_MSG_INFORMATION, "Tile %s: Region was %g/%g/%g/%g.\n", Q[k]->tag, Q[k]->wesn[XLO], Q[k]->wesn[XHI], Q[k]->wesn[YLO], Q[k]->wesn[YHI]);
continue;