2 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
4 * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 #ifdef HAVE_SYS_TYPES_H
29 #include <sys/types.h>
31 #ifdef HAVE_SYS_STAT_H
38 #include <glib/gi18n.h>
45 #include "background.h"
46 #include "vikwaypoint.h"
48 #include "vikviewport.h"
49 #include "viktreeview.h"
51 #include "vikaggregatelayer.h"
52 #include "viklayerspanel.h"
53 #include "vikmapslayer.h"
54 #include "vikdemlayer.h"
60 #include "icons/icons.h"
62 #define MAPS_CACHE_DIR maps_layer_default_dir()
64 #define SRTM_CACHE_TEMPLATE "%ssrtm3-%s%s%c%02d%c%03d.hgt.zip"
65 #define SRTM_HTTP_SITE "dds.cr.usgs.gov"
66 #define SRTM_HTTP_URI "/srtm/version2_1/SRTM3/OLD/"
68 #ifdef VIK_CONFIG_DEM24K
69 #define DEM24K_DOWNLOAD_SCRIPT "dem24k.pl"
73 static void dem_layer_marshall( VikDEMLayer *vdl, guint8 **data, gint *len );
74 static VikDEMLayer *dem_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp );
75 static gboolean dem_layer_set_param ( VikDEMLayer *vdl, guint16 id, VikLayerParamData data, VikViewport *vp );
76 static VikLayerParamData dem_layer_get_param ( VikDEMLayer *vdl, guint16 id );
77 static void dem_layer_update_gc ( VikDEMLayer *vdl, VikViewport *vp, const gchar *color );
78 static void dem_layer_post_read ( VikLayer *vl, VikViewport *vp, gboolean from_file );
79 static void srtm_draw_existence ( VikViewport *vp );
81 #ifdef VIK_CONFIG_DEM24K
82 static void dem24k_draw_existence ( VikViewport *vp );
85 static VikLayerParamScale param_scales[] = {
91 static gchar *params_source[] = {
92 "SRTM Global 90m (3 arcsec)",
93 #ifdef VIK_CONFIG_DEM24K
100 static gchar *params_type[] = {
101 N_("Absolute height"),
102 N_("Height gradient"),
106 enum { DEM_SOURCE_SRTM,
107 #ifdef VIK_CONFIG_DEM24K
113 enum { DEM_TYPE_HEIGHT = 0,
118 static VikLayerParam dem_layer_params[] = {
119 { "files", VIK_LAYER_PARAM_STRING_LIST, VIK_LAYER_GROUP_NONE, N_("DEM Files:"), VIK_LAYER_WIDGET_FILELIST },
120 { "source", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, N_("Download Source:"), VIK_LAYER_WIDGET_RADIOGROUP_STATIC, params_source, NULL },
121 { "color", VIK_LAYER_PARAM_STRING, VIK_LAYER_GROUP_NONE, N_("Color:"), VIK_LAYER_WIDGET_ENTRY },
122 { "type", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, N_("Type:"), VIK_LAYER_WIDGET_RADIOGROUP_STATIC, params_type, NULL },
123 { "min_elev", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_GROUP_NONE, N_("Min Elev:"), VIK_LAYER_WIDGET_SPINBUTTON, param_scales + 0 },
124 { "max_elev", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_GROUP_NONE, N_("Max Elev:"), VIK_LAYER_WIDGET_SPINBUTTON, param_scales + 0 },
125 { "line_thickness", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, N_("Line Thickness:"), VIK_LAYER_WIDGET_SPINBUTTON, param_scales + 1 },
129 enum { PARAM_FILES=0, PARAM_SOURCE, PARAM_COLOR, PARAM_TYPE, PARAM_MIN_ELEV, PARAM_MAX_ELEV, PARAM_LINE_THICKNESS, NUM_PARAMS };
131 static gpointer dem_layer_download_create ( VikWindow *vw, VikViewport *vvp);
132 static gboolean dem_layer_download_release ( VikDEMLayer *vdl, GdkEventButton *event, VikViewport *vvp );
133 static gboolean dem_layer_download_click ( VikDEMLayer *vdl, GdkEventButton *event, VikViewport *vvp );
135 static VikToolInterface dem_tools[] = {
136 { N_("DEM Download/Import"), (VikToolConstructorFunc) dem_layer_download_create, NULL, NULL, NULL,
137 (VikToolMouseFunc) dem_layer_download_click, NULL, (VikToolMouseFunc) dem_layer_download_release,
138 (VikToolKeyFunc) NULL, GDK_CURSOR_IS_PIXMAP, &cursor_demdl_pixbuf },
145 static gchar *dem_height_colors[] = {
147 "#9b793c", "#9c7d40", "#9d8144", "#9e8549", "#9f894d", "#a08d51", "#a29156", "#a3955a", "#a4995e", "#a69d63",
148 "#a89f65", "#aaa267", "#ada569", "#afa76b", "#b1aa6d", "#b4ad6f", "#b6b071", "#b9b373", "#bcb676", "#beb978",
149 "#c0bc7a", "#c2c07d", "#c4c37f", "#c6c681", "#c8ca84", "#cacd86", "#ccd188", "#cfd58b", "#c2ce84", "#b5c87e",
150 "#a9c278", "#9cbb71", "#8fb56b", "#83af65", "#76a95e", "#6aa358", "#5e9d52", "#63a055", "#69a458", "#6fa85c",
151 "#74ac5f", "#7ab063", "#80b467", "#86b86a", "#8cbc6e", "#92c072", "#94c175", "#97c278", "#9ac47c", "#9cc57f",
152 "#9fc682", "#a2c886", "#a4c989", "#a7cb8d", "#aacd91", "#afce99", "#b5d0a1", "#bbd2aa", "#c0d3b2", "#c6d5ba",
153 "#ccd7c3", "#d1d9cb", "#d7dbd4", "#DDDDDD", "#e0e0e0", "#e4e4e4", "#e8e8e8", "#ebebeb", "#efefef", "#f3f3f3",
154 "#f7f7f7", "#fbfbfb", "#ffffff"
157 static const guint DEM_N_HEIGHT_COLORS = sizeof(dem_height_colors)/sizeof(dem_height_colors[0]);
160 "#9b793c", "#9e8549", "#a29156", "#a69d63", "#ada569", "#b4ad6f", "#bcb676", "#c2c07d", "#c8ca84", "#cfd58b",
161 "#a9c278", "#83af65", "#5e9d52", "#6fa85c", "#80b467", "#92c072", "#9ac47c", "#a2c886", "#aacd91", "#bbd2aa",
162 "#ccd7c3", "#DDDDDD", "#e8e8e8", "#f3f3f3", "#FFFFFF"
166 static gchar *dem_gradient_colors[] = {
168 "#000000", "#000011", "#000022", "#000033", "#000044", "#00004c", "#000055", "#00005d", "#000066", "#00006e",
169 "#000077", "#00007f", "#000088", "#000090", "#000099", "#0000a1", "#0000aa", "#0000b2", "#0000bb", "#0000c3",
170 "#0000cc", "#0000d4", "#0000dd", "#0000e5", "#0000ee", "#0000f6", "#0000ff", "#0008f7", "#0011ee", "#0019e6",
171 "#0022dd", "#002ad5", "#0033cc", "#003bc4", "#0044bb", "#004cb3", "#0055aa", "#005da2", "#006699", "#006e91",
172 "#007788", "#007f80", "#008877", "#00906f", "#009966", "#00a15e", "#00aa55", "#00b24d", "#00bb44", "#00c33c",
173 "#00cc33", "#00d42b", "#00dd22", "#00e51a", "#00ee11", "#00f609", "#00ff00", "#08f700", "#11ee00", "#19e600",
174 "#22dd00", "#2ad500", "#33cc00", "#3bc400", "#44bb00", "#4cb300", "#55aa00", "#5da200", "#669900", "#6e9100",
175 "#778800", "#7f8000", "#887700", "#906f00", "#996600", "#a15e00", "#aa5500", "#b24d00", "#bb4400", "#c33c00",
176 "#cc3300", "#d42b00", "#dd2200", "#e51a00", "#ee1100", "#f60900", "#ff0000",
180 static const guint DEM_N_GRADIENT_COLORS = sizeof(dem_gradient_colors)/sizeof(dem_gradient_colors[0]);
183 VikLayerInterface vik_dem_layer_interface = {
188 sizeof(dem_tools) / sizeof(dem_tools[0]),
197 (VikLayerFuncCreate) vik_dem_layer_create,
198 (VikLayerFuncRealize) NULL,
199 (VikLayerFuncPostRead) dem_layer_post_read,
200 (VikLayerFuncFree) vik_dem_layer_free,
202 (VikLayerFuncProperties) NULL,
203 (VikLayerFuncDraw) vik_dem_layer_draw,
204 (VikLayerFuncChangeCoordMode) NULL,
206 (VikLayerFuncSetMenuItemsSelection) NULL,
207 (VikLayerFuncGetMenuItemsSelection) NULL,
209 (VikLayerFuncAddMenuItems) NULL,
210 (VikLayerFuncSublayerAddMenuItems) NULL,
212 (VikLayerFuncSublayerRenameRequest) NULL,
213 (VikLayerFuncSublayerToggleVisible) NULL,
215 (VikLayerFuncMarshall) dem_layer_marshall,
216 (VikLayerFuncUnmarshall) dem_layer_unmarshall,
218 (VikLayerFuncSetParam) dem_layer_set_param,
219 (VikLayerFuncGetParam) dem_layer_get_param,
221 (VikLayerFuncReadFileData) NULL,
222 (VikLayerFuncWriteFileData) NULL,
224 (VikLayerFuncDeleteItem) NULL,
225 (VikLayerFuncCopyItem) NULL,
226 (VikLayerFuncPasteItem) NULL,
227 (VikLayerFuncFreeCopiedItem) NULL,
228 (VikLayerFuncDragDropRequest) NULL,
231 struct _VikDEMLayer {
239 guint8 line_thickness;
245 GType vik_dem_layer_get_type ()
247 static GType vdl_type = 0;
251 static const GTypeInfo vdl_info =
253 sizeof (VikDEMLayerClass),
254 NULL, /* base_init */
255 NULL, /* base_finalize */
256 NULL, /* class init */
257 NULL, /* class_finalize */
258 NULL, /* class_data */
259 sizeof (VikDEMLayer),
261 NULL /* instance init */
263 vdl_type = g_type_register_static ( VIK_LAYER_TYPE, "VikDEMLayer", &vdl_info, 0 );
269 static void dem_layer_marshall( VikDEMLayer *vdl, guint8 **data, gint *len )
271 vik_layer_marshall_params ( VIK_LAYER(vdl), data, len );
274 static VikDEMLayer *dem_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp )
276 VikDEMLayer *rv = vik_dem_layer_new ();
279 /* TODO: share GCS between layers */
280 for ( i = 0; i < DEM_N_HEIGHT_COLORS; i++ )
281 rv->gcs[i] = vik_viewport_new_gc ( vvp, dem_height_colors[i], rv->line_thickness );
283 for ( i = 0; i < DEM_N_GRADIENT_COLORS; i++ )
284 rv->gcsgradient[i] = vik_viewport_new_gc ( vvp, dem_gradient_colors[i], rv->line_thickness );
286 vik_layer_unmarshall_params ( VIK_LAYER(rv), data, len, vvp );
290 gboolean dem_layer_set_param ( VikDEMLayer *vdl, guint16 id, VikLayerParamData data, VikViewport *vp )
294 case PARAM_COLOR: if ( vdl->color ) g_free ( vdl->color ); vdl->color = g_strdup ( data.s ); break;
295 case PARAM_SOURCE: vdl->source = data.u; break;
296 case PARAM_TYPE: vdl->type = data.u; break;
297 case PARAM_MIN_ELEV: vdl->min_elev = data.d; break;
298 case PARAM_MAX_ELEV: vdl->max_elev = data.d; break;
299 case PARAM_LINE_THICKNESS: if ( data.u >= 1 && data.u <= 15 ) vdl->line_thickness = data.u; break;
300 case PARAM_FILES: a_dems_load_list ( &(data.sl) ); a_dems_list_free ( vdl->files ); vdl->files = data.sl; break;
305 static VikLayerParamData dem_layer_get_param ( VikDEMLayer *vdl, guint16 id )
307 VikLayerParamData rv;
310 case PARAM_FILES: rv.sl = vdl->files; break;
311 case PARAM_SOURCE: rv.u = vdl->source; break;
312 case PARAM_TYPE: rv.u = vdl->type; break;
313 case PARAM_COLOR: rv.s = vdl->color ? vdl->color : ""; break;
314 case PARAM_MIN_ELEV: rv.d = vdl->min_elev; break;
315 case PARAM_MAX_ELEV: rv.d = vdl->max_elev; break;
316 case PARAM_LINE_THICKNESS: rv.i = vdl->line_thickness; break;
321 static void dem_layer_post_read ( VikLayer *vl, VikViewport *vp, gboolean from_file )
323 VikDEMLayer *vdl = VIK_DEM_LAYER(vl);
325 g_object_unref ( G_OBJECT(vdl->gc) );
327 vdl->gc = vik_viewport_new_gc ( vp, vdl->color, vdl->line_thickness );
330 VikDEMLayer *vik_dem_layer_new ( )
332 VikDEMLayer *vdl = VIK_DEM_LAYER ( g_object_new ( VIK_DEM_LAYER_TYPE, NULL ) );
334 vik_layer_init ( VIK_LAYER(vdl), VIK_LAYER_DEM );
341 vdl->gcs = g_malloc(sizeof(GdkGC *)*DEM_N_HEIGHT_COLORS);
342 vdl->gcsgradient = g_malloc(sizeof(GdkGC *)*DEM_N_GRADIENT_COLORS);
343 /* make new gcs only if we need it (copy layer -> use old) */
346 vdl->max_elev = 1000.0;
347 vdl->source = DEM_SOURCE_SRTM;
348 vdl->type = DEM_TYPE_HEIGHT;
349 vdl->line_thickness = 3;
356 static void vik_dem_layer_draw_dem ( VikDEMLayer *vdl, VikViewport *vp, VikDEM *dem )
358 VikDEMColumn *column;
359 VikDEMColumn *nextcolumn;
361 struct LatLon dem_northeast, dem_southwest;
362 gdouble max_lat, max_lon, min_lat, min_lon;
364 /**** Check if viewport and DEM data overlap ****/
366 /* get min, max lat/lon of viewport */
367 vik_viewport_get_min_max_lat_lon ( vp, &min_lat, &max_lat, &min_lon, &max_lon );
369 /* get min, max lat/lon of DEM data */
370 if ( dem->horiz_units == VIK_DEM_HORIZ_LL_ARCSECONDS ) {
371 dem_northeast.lat = dem->max_north / 3600.0;
372 dem_northeast.lon = dem->max_east / 3600.0;
373 dem_southwest.lat = dem->min_north / 3600.0;
374 dem_southwest.lon = dem->min_east / 3600.0;
375 } else if ( dem->horiz_units == VIK_DEM_HORIZ_UTM_METERS ) {
376 struct UTM dem_northeast_utm, dem_southwest_utm;
377 dem_northeast_utm.northing = dem->max_north;
378 dem_northeast_utm.easting = dem->max_east;
379 dem_southwest_utm.northing = dem->min_north;
380 dem_southwest_utm.easting = dem->min_east;
381 dem_northeast_utm.zone = dem_southwest_utm.zone = dem->utm_zone;
382 dem_northeast_utm.letter = dem_southwest_utm.letter = dem->utm_letter;
384 a_coords_utm_to_latlon(&dem_northeast_utm, &dem_northeast);
385 a_coords_utm_to_latlon(&dem_southwest_utm, &dem_southwest);
388 if ( (max_lat > dem_northeast.lat && min_lat > dem_northeast.lat) ||
389 (max_lat < dem_southwest.lat && min_lat < dem_southwest.lat) )
391 else if ( (max_lon > dem_northeast.lon && min_lon > dem_northeast.lon) ||
392 (max_lon < dem_southwest.lon && min_lon < dem_southwest.lon) )
394 /* else they overlap */
396 /**** End Overlap Check ****/
397 /* boxes to show where we have DEM instead of actually drawing the DEM.
398 * useful if we want to see what areas we have coverage for (if we want
399 * to get elevation data for a track) but don't want to cover the map.
403 /* draw a box if a DEM is loaded. in future I'd like to add an option for this
404 * this is useful if we want to see what areas we have dem for but don't want to
405 * cover the map (or maybe we just need translucent DEM?) */
407 VikCoord demne, demsw;
409 vik_coord_load_from_latlon(&demne, vik_viewport_get_coord_mode(vp), &dem_northeast);
410 vik_coord_load_from_latlon(&demsw, vik_viewport_get_coord_mode(vp), &dem_southwest);
412 vik_viewport_coord_to_screen ( vp, &demne, &x1, &y1 );
413 vik_viewport_coord_to_screen ( vp, &demsw, &x2, &y2 );
415 if ( x1 > vik_viewport_get_width(vp) ) x1=vik_viewport_get_width(vp);
416 if ( y2 > vik_viewport_get_height(vp) ) y2=vik_viewport_get_height(vp);
417 if ( x2 < 0 ) x2 = 0;
418 if ( y1 < 0 ) y1 = 0;
419 vik_viewport_draw_rectangle ( vp, GTK_WIDGET(vp)->style->black_gc,
420 FALSE, x2, y1, x1-x2, y2-y1 );
425 if ( dem->horiz_units == VIK_DEM_HORIZ_LL_ARCSECONDS ) {
426 VikCoord tmp; /* TODO: don't use coord_load_from_latlon, especially if in latlon drawing mode */
428 gdouble max_lat_as, max_lon_as, min_lat_as, min_lon_as;
429 gdouble start_lat_as, end_lat_as, start_lon_as, end_lon_as;
431 gdouble start_lat, end_lat, start_lon, end_lon;
433 struct LatLon counter;
435 guint x, y, start_x, start_y;
439 guint skip_factor = ceil ( vik_viewport_get_xmpp(vp) / 40 ); /* todo: smarter calculation. */
441 gdouble nscale_deg = dem->north_scale / ((gdouble) 3600);
442 gdouble escale_deg = dem->east_scale / ((gdouble) 3600);
444 max_lat_as = max_lat * 3600;
445 min_lat_as = min_lat * 3600;
446 max_lon_as = max_lon * 3600;
447 min_lon_as = min_lon * 3600;
449 start_lat_as = MAX(min_lat_as, dem->min_north);
450 end_lat_as = MIN(max_lat_as, dem->max_north);
451 start_lon_as = MAX(min_lon_as, dem->min_east);
452 end_lon_as = MIN(max_lon_as, dem->max_east);
454 start_lat = floor(start_lat_as / dem->north_scale) * nscale_deg;
455 end_lat = ceil (end_lat_as / dem->north_scale) * nscale_deg;
456 start_lon = floor(start_lon_as / dem->east_scale) * escale_deg;
457 end_lon = ceil (end_lon_as / dem->east_scale) * escale_deg;
459 vik_dem_east_north_to_xy ( dem, start_lon_as, start_lat_as, &start_x, &start_y );
461 /* verify sane elev interval */
462 if ( vdl->max_elev <= vdl->min_elev )
463 vdl->max_elev = vdl->min_elev + 1;
465 for ( x=start_x, counter.lon = start_lon; counter.lon <= end_lon; counter.lon += escale_deg * skip_factor, x += skip_factor ) {
466 if ( x > 0 && x < dem->n_columns ) {
467 column = g_ptr_array_index ( dem->columns, x );
468 if(x+1 == dem->n_columns) {
469 nextcolumn = g_ptr_array_index ( dem->columns, x-1);
471 nextcolumn = g_ptr_array_index ( dem->columns, x+1);
474 for ( y=start_y, counter.lat = start_lat; counter.lat <= end_lat; counter.lat += nscale_deg * skip_factor, y += skip_factor ) {
475 if ( y > column->n_points )
477 elev = column->points[y];
479 if(vdl->type == DEM_TYPE_HEIGHT) {
480 if ( elev != VIK_DEM_INVALID_ELEVATION && elev < vdl->min_elev )
482 if ( elev != VIK_DEM_INVALID_ELEVATION && elev > vdl->max_elev )
489 vik_coord_load_from_latlon(&tmp, vik_viewport_get_coord_mode(vp), &counter);
490 vik_viewport_coord_to_screen(vp, &tmp, &a, &b);
491 if(vdl->type == DEM_TYPE_GRADIENT) {
492 if( elev == VIK_DEM_INVALID_ELEVATION ) {
495 // calculate gradient, but only in two orthogonal directions.
500 if(y+1 == column->n_points)
501 newelev = column->points[y-1];
503 newelev = column->points[y+1];
504 if(newelev != VIK_DEM_INVALID_ELEVATION)
505 change += abs(newelev - elev);
508 if(y+1 == nextcolumn->n_points)
509 newelev = nextcolumn->points[y-1];
511 newelev = nextcolumn->points[y+1];
512 if(newelev != VIK_DEM_INVALID_ELEVATION)
513 change += abs(newelev - elev);
516 newelev = nextcolumn->points[y];
517 if(newelev != VIK_DEM_INVALID_ELEVATION)
518 change += abs(newelev - elev);
522 newelev = nextcolumn->points[y+1];
524 newelev = nextcolumn->points[y-1];
525 if(newelev != VIK_DEM_INVALID_ELEVATION)
526 change += abs(newelev - elev);
528 change = log(change) * log(change) * log(change);
530 if(change < vdl->min_elev)
531 change = vdl->min_elev;
533 if(change > vdl->max_elev)
534 change = vdl->max_elev;
536 // void vik_viewport_draw_rectangle ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint x1, gint y1, gint x2, gint y2 );
537 vik_viewport_draw_rectangle(vp, vdl->gcsgradient[(gint)floor((change - vdl->min_elev)/(vdl->max_elev - vdl->min_elev)*(DEM_N_GRADIENT_COLORS-2))+1], TRUE, a-2, b-2, 4, 4 );
540 if(vdl->type == DEM_TYPE_HEIGHT) {
541 if ( elev == VIK_DEM_INVALID_ELEVATION )
542 ; /* don't draw it */
543 else if ( elev <= 0 )
544 vik_viewport_draw_rectangle(vp, vdl->gcs[0], TRUE, a-2, b-2, 4, 4 );
546 vik_viewport_draw_rectangle(vp, vdl->gcs[(gint)floor((elev - vdl->min_elev)/(vdl->max_elev - vdl->min_elev)*(DEM_N_HEIGHT_COLORS-2))+1], TRUE, a-2, b-2, 4, 4 );
554 } else if ( dem->horiz_units == VIK_DEM_HORIZ_UTM_METERS ) {
555 gdouble max_nor, max_eas, min_nor, min_eas;
556 gdouble start_nor, start_eas, end_nor, end_eas;
560 guint x, y, start_x, start_y;
562 VikCoord tmp; /* TODO: don't use coord_load_from_latlon, especially if in latlon drawing mode */
565 guint skip_factor = ceil ( vik_viewport_get_xmpp(vp) / 10 ); /* todo: smarter calculation. */
567 VikCoord tleft, tright, bleft, bright;
569 vik_viewport_screen_to_coord ( vp, 0, 0, &tleft );
570 vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), 0, &tright );
571 vik_viewport_screen_to_coord ( vp, 0, vik_viewport_get_height(vp), &bleft );
572 vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), vik_viewport_get_height(vp), &bright );
575 vik_coord_convert(&tleft, VIK_COORD_UTM);
576 vik_coord_convert(&tright, VIK_COORD_UTM);
577 vik_coord_convert(&bleft, VIK_COORD_UTM);
578 vik_coord_convert(&bright, VIK_COORD_UTM);
580 max_nor = MAX(tleft.north_south, tright.north_south);
581 min_nor = MIN(bleft.north_south, bright.north_south);
582 max_eas = MAX(bright.east_west, tright.east_west);
583 min_eas = MIN(bleft.east_west, tleft.east_west);
585 start_nor = MAX(min_nor, dem->min_north);
586 end_nor = MIN(max_nor, dem->max_north);
587 if ( tleft.utm_zone == dem->utm_zone && bleft.utm_zone == dem->utm_zone
588 && (tleft.utm_letter >= 'N') == (dem->utm_letter >= 'N')
589 && (bleft.utm_letter >= 'N') == (dem->utm_letter >= 'N') ) /* if the utm zones/hemispheres are different, min_eas will be bogus */
590 start_eas = MAX(min_eas, dem->min_east);
592 start_eas = dem->min_east;
593 if ( tright.utm_zone == dem->utm_zone && bright.utm_zone == dem->utm_zone
594 && (tright.utm_letter >= 'N') == (dem->utm_letter >= 'N')
595 && (bright.utm_letter >= 'N') == (dem->utm_letter >= 'N') ) /* if the utm zones/hemispheres are different, min_eas will be bogus */
596 end_eas = MIN(max_eas, dem->max_east);
598 end_eas = dem->max_east;
600 start_nor = floor(start_nor / dem->north_scale) * dem->north_scale;
601 end_nor = ceil (end_nor / dem->north_scale) * dem->north_scale;
602 start_eas = floor(start_eas / dem->east_scale) * dem->east_scale;
603 end_eas = ceil (end_eas / dem->east_scale) * dem->east_scale;
605 vik_dem_east_north_to_xy ( dem, start_eas, start_nor, &start_x, &start_y );
607 /* TODO: why start_x and start_y are -1 -- rounding error from above? */
609 counter.zone = dem->utm_zone;
610 counter.letter = dem->utm_letter;
612 for ( x=start_x, counter.easting = start_eas; counter.easting <= end_eas; counter.easting += dem->east_scale * skip_factor, x += skip_factor ) {
613 if ( x > 0 && x < dem->n_columns ) {
614 column = g_ptr_array_index ( dem->columns, x );
615 for ( y=start_y, counter.northing = start_nor; counter.northing <= end_nor; counter.northing += dem->north_scale * skip_factor, y += skip_factor ) {
616 if ( y > column->n_points )
618 elev = column->points[y];
619 if ( elev != VIK_DEM_INVALID_ELEVATION && elev < vdl->min_elev )
621 if ( elev != VIK_DEM_INVALID_ELEVATION && elev > vdl->max_elev )
626 vik_coord_load_from_utm(&tmp, vik_viewport_get_coord_mode(vp), &counter);
627 vik_viewport_coord_to_screen(vp, &tmp, &a, &b);
628 if ( elev == VIK_DEM_INVALID_ELEVATION )
629 ; /* don't draw it */
630 else if ( elev <= 0 )
631 vik_viewport_draw_rectangle(vp, vdl->gcs[0], TRUE, a-2, b-2, 4, 4 );
633 vik_viewport_draw_rectangle(vp, vdl->gcs[(gint)floor((elev - vdl->min_elev)/(vdl->max_elev - vdl->min_elev)*(DEM_N_HEIGHT_COLORS-2))+1], TRUE, a-2, b-2, 4, 4 );
641 /* return the continent for the specified lat, lon */
643 static const gchar *srtm_continent_dir ( gint lat, gint lon )
645 extern const char *_srtm_continent_data[];
646 static GHashTable *srtm_continent = NULL;
647 const gchar *continent;
650 if (!srtm_continent) {
653 srtm_continent = g_hash_table_new(g_str_hash, g_str_equal);
654 s = _srtm_continent_data;
655 while (*s != (gchar *)-1) {
658 g_hash_table_insert(srtm_continent, (gpointer) *s, (gpointer) continent);
664 g_snprintf(name, sizeof(name), "%c%02d%c%03d",
665 (lat >= 0) ? 'N' : 'S', ABS(lat),
666 (lon >= 0) ? 'E' : 'W', ABS(lon));
668 return(g_hash_table_lookup(srtm_continent, name));
671 void vik_dem_layer_draw ( VikDEMLayer *vdl, gpointer data )
673 VikViewport *vp = (VikViewport *) data;
674 GList *dems_iter = vdl->files;
678 /* search for SRTM3 90m */
680 if ( vdl->source == DEM_SOURCE_SRTM )
681 srtm_draw_existence ( vp );
682 #ifdef VIK_CONFIG_DEM24K
683 else if ( vdl->source == DEM_SOURCE_DEM24K )
684 dem24k_draw_existence ( vp );
687 while ( dems_iter ) {
688 dem = a_dems_get ( (const char *) (dems_iter->data) );
690 vik_dem_layer_draw_dem ( vdl, vp, dem );
691 dems_iter = dems_iter->next;
695 void vik_dem_layer_free ( VikDEMLayer *vdl )
698 if ( vdl->gc != NULL )
699 g_object_unref ( G_OBJECT(vdl->gc) );
701 if ( vdl->color != NULL )
702 g_free ( vdl->color );
705 for ( i = 0; i < DEM_N_HEIGHT_COLORS; i++ )
706 g_object_unref ( vdl->gcs[i] );
709 if ( vdl->gcsgradient )
710 for ( i = 0; i < DEM_N_GRADIENT_COLORS; i++ )
711 g_object_unref ( vdl->gcsgradient[i] );
712 g_free ( vdl->gcsgradient );
714 a_dems_list_free ( vdl->files );
717 static void dem_layer_update_gc ( VikDEMLayer *vdl, VikViewport *vp, const gchar *color )
720 g_free ( vdl->color );
722 vdl->color = g_strdup ( color );
725 g_object_unref ( G_OBJECT(vdl->gc) );
727 vdl->gc = vik_viewport_new_gc ( vp, vdl->color, vdl->line_thickness );
730 VikDEMLayer *vik_dem_layer_create ( VikViewport *vp )
732 VikDEMLayer *vdl = vik_dem_layer_new ();
735 /* TODO: share GCS between layers */
736 for ( i = 0; i < DEM_N_HEIGHT_COLORS; i++ )
737 vdl->gcs[i] = vik_viewport_new_gc ( vp, dem_height_colors[i], vdl->line_thickness );
739 for ( i = 0; i < DEM_N_GRADIENT_COLORS; i++ )
740 vdl->gcsgradient[i] = vik_viewport_new_gc ( vp, dem_gradient_colors[i], vdl->line_thickness );
742 dem_layer_update_gc ( vdl, vp, "red" );
745 /**************************************************************
746 **** SOURCES & DOWNLOADING
747 **************************************************************/
753 VikDEMLayer *vdl; /* NULL if not alive */
759 /**************************************************
761 **************************************************/
763 static void srtm_dem_download_thread ( DEMDownloadParams *p, gpointer threaddata )
766 const gchar *continent_dir;
768 intlat = (int)floor(p->lat);
769 intlon = (int)floor(p->lon);
770 continent_dir = srtm_continent_dir(intlat, intlon);
772 if (!continent_dir) {
773 g_warning(N_("No SRTM data available for %f, %f"), p->lat, p->lon);
777 gchar *src_fn = g_strdup_printf("%s%s/%c%02d%c%03d.hgt.zip",
780 (intlat >= 0) ? 'N' : 'S',
782 (intlon >= 0) ? 'E' : 'W',
785 static DownloadOptions options = { 0, NULL, 0, a_check_map_file };
786 a_http_download_get_url ( SRTM_HTTP_SITE, src_fn, p->dest, &options, NULL );
790 static gchar *srtm_lat_lon_to_dest_fn ( gdouble lat, gdouble lon )
793 const gchar *continent_dir;
795 intlat = (int)floor(lat);
796 intlon = (int)floor(lon);
797 continent_dir = srtm_continent_dir(intlat, intlon);
800 continent_dir = "nowhere";
802 return g_strdup_printf("srtm3-%s%s%c%02d%c%03d.hgt.zip",
805 (intlat >= 0) ? 'N' : 'S',
807 (intlon >= 0) ? 'E' : 'W',
812 /* TODO: generalize */
813 static void srtm_draw_existence ( VikViewport *vp )
815 gdouble max_lat, max_lon, min_lat, min_lon;
816 gchar buf[strlen(MAPS_CACHE_DIR)+strlen(SRTM_CACHE_TEMPLATE)+30];
819 vik_viewport_get_min_max_lat_lon ( vp, &min_lat, &max_lat, &min_lon, &max_lon );
821 for (i = floor(min_lat); i <= floor(max_lat); i++) {
822 for (j = floor(min_lon); j <= floor(max_lon); j++) {
823 const gchar *continent_dir;
824 if ((continent_dir = srtm_continent_dir(i, j)) == NULL)
826 g_snprintf(buf, sizeof(buf), SRTM_CACHE_TEMPLATE,
830 (i >= 0) ? 'N' : 'S',
832 (j >= 0) ? 'E' : 'W',
834 if ( g_file_test(buf, G_FILE_TEST_EXISTS ) == TRUE ) {
839 sw.mode = VIK_COORD_LATLON;
840 ne.north_south = i+1;
842 ne.mode = VIK_COORD_LATLON;
843 vik_viewport_coord_to_screen ( vp, &sw, &x1, &y1 );
844 vik_viewport_coord_to_screen ( vp, &ne, &x2, &y2 );
845 if ( x1 < 0 ) x1 = 0;
846 if ( y2 < 0 ) y2 = 0;
847 vik_viewport_draw_rectangle ( vp, GTK_WIDGET(vp)->style->black_gc,
848 FALSE, x1, y2, x2-x1, y1-y2 );
855 /**************************************************
857 **************************************************/
859 #ifdef VIK_CONFIG_DEM24K
861 static void dem24k_dem_download_thread ( DEMDownloadParams *p, gpointer threaddata )
864 gchar *cmdline = g_strdup_printf("%s %.03f %.03f",
865 DEM24K_DOWNLOAD_SCRIPT,
868 /* FIX: don't use system, use execv or something. check for existence */
872 static gchar *dem24k_lat_lon_to_dest_fn ( gdouble lat, gdouble lon )
874 return g_strdup_printf("dem24k/%d/%d/%.03f,%.03f.dem",
881 /* TODO: generalize */
882 static void dem24k_draw_existence ( VikViewport *vp )
884 gdouble max_lat, max_lon, min_lat, min_lon;
885 gchar buf[strlen(MAPS_CACHE_DIR)+40];
888 vik_viewport_get_min_max_lat_lon ( vp, &min_lat, &max_lat, &min_lon, &max_lon );
890 for (i = floor(min_lat*8)/8; i <= floor(max_lat*8)/8; i+=0.125) {
891 /* check lat dir first -- faster */
892 g_snprintf(buf, sizeof(buf), "%sdem24k/%d/",
895 if ( g_file_test(buf, G_FILE_TEST_EXISTS) == FALSE )
897 for (j = floor(min_lon*8)/8; j <= floor(max_lon*8)/8; j+=0.125) {
898 /* check lon dir first -- faster */
899 g_snprintf(buf, sizeof(buf), "%sdem24k/%d/%d/",
903 if ( g_file_test(buf, G_FILE_TEST_EXISTS) == FALSE )
905 g_snprintf(buf, sizeof(buf), "%sdem24k/%d/%d/%.03f,%.03f.dem",
911 if ( g_file_test(buf, G_FILE_TEST_EXISTS ) == TRUE ) {
915 sw.east_west = j-0.125;
916 sw.mode = VIK_COORD_LATLON;
917 ne.north_south = i+0.125;
919 ne.mode = VIK_COORD_LATLON;
920 vik_viewport_coord_to_screen ( vp, &sw, &x1, &y1 );
921 vik_viewport_coord_to_screen ( vp, &ne, &x2, &y2 );
922 if ( x1 < 0 ) x1 = 0;
923 if ( y2 < 0 ) y2 = 0;
924 vik_viewport_draw_rectangle ( vp, GTK_WIDGET(vp)->style->black_gc,
925 FALSE, x1, y2, x2-x1, y1-y2 );
932 /**************************************************
933 * SOURCES -- DOWNLOADING & IMPORTING TOOL *
934 **************************************************
937 static void weak_ref_cb ( gpointer ptr, GObject * dead_vdl )
939 DEMDownloadParams *p = ptr;
940 g_mutex_lock ( p->mutex );
942 g_mutex_unlock ( p->mutex );
945 /* Try to add file full_path.
946 * full_path will be copied.
947 * returns FALSE if file does not exists, TRUE otherwise.
949 static gboolean dem_layer_add_file ( VikDEMLayer *vdl, const gchar *full_path )
951 if ( g_file_test(full_path, G_FILE_TEST_EXISTS ) == TRUE ) {
952 /* only load if file size is not 0 (not in progress) */
954 stat (full_path, &sb);
956 gchar *duped_path = g_strdup(full_path);
957 vdl->files = g_list_prepend ( vdl->files, duped_path );
958 a_dems_load ( duped_path );
959 g_debug("%s: %s", __FUNCTION__, duped_path);
960 vik_layer_emit_update ( VIK_LAYER(vdl) );
967 static void dem_download_thread ( DEMDownloadParams *p, gpointer threaddata )
969 if ( p->source == DEM_SOURCE_SRTM )
970 srtm_dem_download_thread ( p, threaddata );
971 #ifdef VIK_CONFIG_DEM24K
972 else if ( p->source == DEM_SOURCE_DEM24K )
973 dem24k_dem_download_thread ( p, threaddata );
977 g_mutex_lock ( p->mutex );
979 g_object_weak_unref ( G_OBJECT(p->vdl), weak_ref_cb, p );
981 if ( dem_layer_add_file ( p->vdl, p->dest ) )
982 vik_layer_emit_update ( VIK_LAYER(p->vdl) );
984 g_mutex_unlock ( p->mutex );
989 static void free_dem_download_params ( DEMDownloadParams *p )
991 g_mutex_free ( p->mutex );
996 static gpointer dem_layer_download_create ( VikWindow *vw, VikViewport *vvp)
1002 static gboolean dem_layer_download_release ( VikDEMLayer *vdl, GdkEventButton *event, VikViewport *vvp )
1008 gchar *dem_file = NULL;
1010 if ( vdl->source == DEM_SOURCE_NONE )
1011 a_dialog_error_msg ( VIK_GTK_WINDOW_FROM_LAYER(vdl), _("No download source selected. Edit layer properties.") );
1013 vik_viewport_screen_to_coord ( vvp, event->x, event->y, &coord );
1014 vik_coord_to_latlon ( &coord, &ll );
1017 if ( vdl->source == DEM_SOURCE_SRTM )
1018 dem_file = srtm_lat_lon_to_dest_fn ( ll.lat, ll.lon );
1019 #ifdef VIK_CONFIG_DEM24K
1020 else if ( vdl->source == DEM_SOURCE_DEM24K )
1021 dem_file = dem24k_lat_lon_to_dest_fn ( ll.lat, ll.lon );
1027 full_path = g_strdup_printf("%s%s", MAPS_CACHE_DIR, dem_file );
1029 g_debug("%s: %s", __FUNCTION__, full_path);
1031 // TODO: check if already in filelist
1033 if ( ! dem_layer_add_file(vdl, full_path) ) {
1034 gchar *tmp = g_strdup_printf ( _("Downloading DEM %s"), dem_file );
1035 DEMDownloadParams *p = g_malloc(sizeof(DEMDownloadParams));
1036 p->dest = g_strdup(full_path);
1040 p->mutex = g_mutex_new();
1041 p->source = vdl->source;
1042 g_object_weak_ref(G_OBJECT(p->vdl), weak_ref_cb, p );
1044 a_background_thread ( VIK_GTK_WINDOW_FROM_LAYER(vdl), tmp,
1045 (vik_thr_func) dem_download_thread, p,
1046 (vik_thr_free_func) free_dem_download_params, NULL, 1 );
1049 g_free ( dem_file );
1050 g_free ( full_path );
1055 static gboolean dem_layer_download_click ( VikDEMLayer *vdl, GdkEventButton *event, VikViewport *vvp )
1057 /* choose & keep track of cache dir
1058 * download in background thread
1059 * download over area */