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 #include "vikmapslayer.h"
32 static guint8 osm_zoom ( gdouble mpp );
34 static gboolean osm_coord_to_mapcoord ( const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest );
35 static void osm_mapcoord_to_center_coord ( MapCoord *src, VikCoord *dest );
36 static int osm_maplint_download ( MapCoord *src, const gchar *dest_fn );
37 static int osm_mapnik_download ( MapCoord *src, const gchar *dest_fn );
38 static int osm_osmarender_download ( MapCoord *src, const gchar *dest_fn );
39 static int bluemarble_download ( MapCoord *src, const gchar *dest_fn );
41 static DownloadOptions osm_options = { NULL, 0 };
45 VikMapsLayer_MapType osmarender_type = { 12, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, osm_coord_to_mapcoord, osm_mapcoord_to_center_coord, osm_osmarender_download };
46 VikMapsLayer_MapType mapnik_type = { 13, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, osm_coord_to_mapcoord, osm_mapcoord_to_center_coord, osm_mapnik_download }; VikMapsLayer_MapType maplint_type = { 14, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, osm_coord_to_mapcoord, osm_mapcoord_to_center_coord, osm_maplint_download };
48 VikMapsLayer_MapType bluemarble_type = { 15, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, osm_coord_to_mapcoord, osm_mapcoord_to_center_coord, bluemarble_download };
50 maps_layer_register_type("OpenStreetMap (Osmarender)", 12, &osmarender_type);
51 maps_layer_register_type("OpenStreetMap (Mapnik)", 13, &mapnik_type);
52 maps_layer_register_type("OpenStreetMap (Maplint)", 14, &maplint_type);
54 maps_layer_register_type("BlueMarble", 15, &bluemarble_type);
57 /* 1 << (x) is like a 2**(x) */
58 #define GZ(x) (1<<(x))
60 static const gdouble scale_mpps[] = { GZ(0), GZ(1), GZ(2), GZ(3), GZ(4), GZ(5), GZ(6), GZ(7), GZ(8), GZ(9),
61 GZ(10), GZ(11), GZ(12), GZ(13), GZ(14), GZ(15), GZ(16), GZ(17) };
63 static const gint num_scales = (sizeof(scale_mpps) / sizeof(scale_mpps[0]));
65 #define ERROR_MARGIN 0.01
66 guint8 osm_zoom ( gdouble mpp ) {
68 for ( i = 0; i < num_scales; i++ ) {
69 if ( ABS(scale_mpps[i] - mpp) < ERROR_MARGIN )
75 static gboolean osm_coord_to_mapcoord ( const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest )
77 g_assert ( src->mode == VIK_COORD_LATLON );
82 dest->scale = osm_zoom ( xzoom );
83 if ( dest->scale == 255 )
86 dest->x = (src->east_west + 180) / 360 * GZ(17) / xzoom;
87 dest->y = (180 - MERCLAT(src->north_south)) / 360 * GZ(17) / xzoom;
92 static void osm_mapcoord_to_center_coord ( MapCoord *src, VikCoord *dest )
94 gdouble socalled_mpp = GZ(src->scale);
95 dest->mode = VIK_COORD_LATLON;
96 dest->east_west = ((src->x+0.5) / GZ(17) * socalled_mpp * 360) - 180;
97 dest->north_south = DEMERCLAT(180 - ((src->y+0.5) / GZ(17) * socalled_mpp * 360));
101 * Ex: http://dev.openstreetmap.org/~ojw/Tiles/maplint.php/10/517/375.png
103 static int osm_maplint_download ( MapCoord *src, const gchar *dest_fn )
106 gchar *uri = g_strdup_printf ( "/~ojw/Tiles/maplint.php/%d/%d/%d.png", 17-src->scale, src->x, src->y );
107 res = a_http_download_get_url ( "dev.openstreetmap.org", uri, dest_fn, &osm_options );
112 static int osm_mapnik_download ( MapCoord *src, const gchar *dest_fn )
115 gchar *uri = g_strdup_printf ( "/osamrender/%d/%d/%d.png", 17-src->scale, src->x, src->y );
116 res = a_http_download_get_url ( "tile.openstreetmap.org", uri, dest_fn, &osm_options );
121 static int osm_osmarender_download ( MapCoord *src, const gchar *dest_fn )
124 gchar *uri = g_strdup_printf ( "/Tiles/tile/%d/%d/%d.png", 17-src->scale, src->x, src->y );
125 res = a_http_download_get_url ( "tah.openstreetmap.org", uri, dest_fn, &osm_options );
130 static int bluemarble_download ( MapCoord *src, const gchar *dest_fn )
133 gchar *uri = g_strdup_printf ( "/com.modestmaps.bluemarble/%d-r%d-c%d.jpg", 17-src->scale, src->y, src->x );
134 g_print("s3.amazonaws.com/%s\n", uri);
135 res = a_http_download_get_url ( "s3.amazonaws.com", uri, dest_fn, &osm_options );