src/osm.c

   1 /*
   2  * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
   3  *
   4  * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  *
  20  */
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #include <gtk/gtk.h>
  26 #include <glib/gi18n.h>
  27 #ifdef HAVE_MATH_H
  28 #include <math.h>
  29 #endif
  30 #include "viking.h"
  31 #include "coords.h"
  32 #include "vikcoord.h"
  33 #include "mapcoord.h"
  34 #include "vikmapslayer.h"
  35 #include "vikwebtoolcenter.h"
  36 #include "vikexttools.h"
  37
  38 #include "osm.h"
  39
  40 static guint8 osm_zoom ( gdouble mpp );
  41
  42 static gboolean osm_coord_to_mapcoord ( const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest );
  43 static void osm_mapcoord_to_center_coord ( MapCoord *src, VikCoord *dest );
  44 static int osm_maplint_download ( MapCoord *src, const gchar *dest_fn );
  45 static int osm_mapnik_download ( MapCoord *src, const gchar *dest_fn );
  46 static int osm_osmarender_download ( MapCoord *src, const gchar *dest_fn );
  47 static int osm_cycle_download ( MapCoord *src, const gchar *dest_fn );
  48 #ifdef VIK_CONFIG_BLUEMARBLE
  49 static int bluemarble_download ( MapCoord *src, const gchar *dest_fn );
  50 #endif
  51 #ifdef VIK_CONFIG_OPENAERIAL
  52 static int openaerialmap_download ( MapCoord *src, const gchar *dest_fn );
  53 #endif
  54
  55 static DownloadOptions osm_options = { NULL, 0, a_check_map_file };
  56
  57 /* initialisation */
  58 void osm_init () {
  59   VikMapsLayer_MapType osmarender_type = { 12, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, osm_coord_to_mapcoord, osm_mapcoord_to_center_coord, osm_osmarender_download };
  60   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 };
  61   VikMapsLayer_MapType cycle_type = { 17, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, osm_coord_to_mapcoord, osm_mapcoord_to_center_coord, osm_cycle_download };
  62
  63 #ifdef VIK_CONFIG_BLUEMARBLE
  64   VikMapsLayer_MapType bluemarble_type = { 15, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, osm_coord_to_mapcoord, osm_mapcoord_to_center_coord, bluemarble_download };
  65 #endif
  66
  67 #ifdef VIK_CONFIG_OPENAERIAL
  68   VikMapsLayer_MapType openaerialmap_type = { 20, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, osm_coord_to_mapcoord, osm_mapcoord_to_center_coord, openaerialmap_download };
  69 #endif
  70
  71   maps_layer_register_type("OpenStreetMap (Osmarender)", 12, &osmarender_type);
  72   maps_layer_register_type("OpenStreetMap (Mapnik)", 13, &mapnik_type);
  73   maps_layer_register_type("OpenStreetMap (Maplint)", 14, &maplint_type);
  74   maps_layer_register_type("OpenStreetMap (Cycle)", 17, &cycle_type);
  75
  76 #ifdef VIK_CONFIG_BLUEMARBLE
  77   maps_layer_register_type("BlueMarble", 15, &bluemarble_type);
  78 #endif
  79 #ifdef VIK_CONFIG_OPENAERIAL
  80   maps_layer_register_type("OpenAerialMap", 20, &openaerialmap_type);
  81 #endif
  82
  83   // Webtools
  84   VikWebtoolCenter *webtool = NULL;
  85   webtool = vik_webtool_center_new_with_members ( _("OSM (view)"), "http://openstreetmap.org/?lat=%s&lon=%s&zoom=%d&layers=B000FTF" );
  86   vik_ext_tools_register ( VIK_EXT_TOOL ( webtool ) );
  87   g_object_unref ( webtool );
  88
  89   webtool = vik_webtool_center_new_with_members ( _("OSM (edit)"), "http://www.openstreetmap.org/edit?lat=%s&lon=%s&zoom=%d" );
  90   vik_ext_tools_register ( VIK_EXT_TOOL ( webtool ) );
  91   g_object_unref ( webtool );
  92
  93   webtool = vik_webtool_center_new_with_members ( _("OSM (render)"), "http://www.informationfreeway.org/?lat=%s&lon=%s&zoom=%d&layers=B0000F000F" );
  94   vik_ext_tools_register ( VIK_EXT_TOOL ( webtool ) );
  95   g_object_unref ( webtool );
  96 }
  97
  98 /* 1 << (x) is like a 2**(x) */
  99 #define GZ(x) (1<<(x))
 100
 101 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),
 102                                       GZ(10), GZ(11), GZ(12), GZ(13), GZ(14), GZ(15), GZ(16), GZ(17) };
 103
 104 static const gint num_scales = (sizeof(scale_mpps) / sizeof(scale_mpps[0]));
 105
 106 #define ERROR_MARGIN 0.01
 107 guint8 osm_zoom ( gdouble mpp ) {
 108   gint i;
 109   for ( i = 0; i < num_scales; i++ ) {
 110     if ( ABS(scale_mpps[i] - mpp) < ERROR_MARGIN )
 111       return i;
 112   }
 113   return 255;
 114 }
 115
 116 static gboolean osm_coord_to_mapcoord ( const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest )
 117 {
 118   g_assert ( src->mode == VIK_COORD_LATLON );
 119
 120   if ( xzoom != yzoom )
 121     return FALSE;
 122
 123   dest->scale = osm_zoom ( xzoom );
 124   if ( dest->scale == 255 )
 125     return FALSE;
 126
 127   dest->x = (src->east_west + 180) / 360 * GZ(17) / xzoom;
 128   dest->y = (180 - MERCLAT(src->north_south)) / 360 * GZ(17) / xzoom;
 129   dest->z = 0;
 130   return TRUE;
 131 }
 132
 133 static void osm_mapcoord_to_center_coord ( MapCoord *src, VikCoord *dest )
 134 {
 135   gdouble socalled_mpp = GZ(src->scale);
 136   dest->mode = VIK_COORD_LATLON;
 137   dest->east_west = ((src->x+0.5) / GZ(17) * socalled_mpp * 360) - 180;
 138   dest->north_south = DEMERCLAT(180 - ((src->y+0.5) / GZ(17) * socalled_mpp * 360));
 139 }
 140
 141 /* Maplint tiles
 142  * Ex: http://dev.openstreetmap.org/~ojw/Tiles/maplint.php/10/517/375.png
 143  */
 144 static int osm_maplint_download ( MapCoord *src, const gchar *dest_fn )
 145 {
 146    int res = -1;
 147    gchar *uri = g_strdup_printf ( "/Tiles/maplint.php/%d/%d/%d.png", 17-src->scale, src->x, src->y );
 148    res = a_http_download_get_url ( "tah.openstreetmap.org", uri, dest_fn, &osm_options );
 149    g_free ( uri );
 150    return res;
 151 }
 152
 153 static int osm_mapnik_download ( MapCoord *src, const gchar *dest_fn )
 154 {
 155    int res = -1;
 156    gchar *uri = g_strdup_printf ( "/%d/%d/%d.png", 17-src->scale, src->x, src->y );
 157    res = a_http_download_get_url ( "tile.openstreetmap.org", uri, dest_fn, &osm_options );
 158    g_free ( uri );
 159    return res;
 160 }
 161
 162 static int osm_osmarender_download ( MapCoord *src, const gchar *dest_fn )
 163 {
 164    int res = -1;
 165    gchar *uri = g_strdup_printf ( "/Tiles/tile/%d/%d/%d.png", 17-src->scale, src->x, src->y );
 166    res = a_http_download_get_url ( "tah.openstreetmap.org", uri, dest_fn, &osm_options );
 167    g_free ( uri );
 168    return res;
 169 }
 170
 171 #ifdef VIK_CONFIG_BLUEMARBLE
 172 static int bluemarble_download ( MapCoord *src, const gchar *dest_fn )
 173 {
 174    int res = -1;
 175    gchar *uri = g_strdup_printf ( "/com.modestmaps.bluemarble/%d-r%d-c%d.jpg", 17-src->scale, src->y, src->x );
 176    res = a_http_download_get_url ( "s3.amazonaws.com", uri, dest_fn, &osm_options );
 177
 178    g_free ( uri );
 179    return res;
 180
 181 }
 182 #endif
 183
 184 #ifdef VIK_CONFIG_OPENAERIAL
 185 static int openaerialmap_download ( MapCoord *src, const gchar *dest_fn )
 186 {
 187    int res = -1;
 188    gchar *uri = g_strdup_printf ( "/tiles/1.0.0/openaerialmap-900913/%d/%d/%d.jpg", 17-src->scale, src->x, src->y );
 189    res = a_http_download_get_url ( "tile.openaerialmap.org", uri, dest_fn, &osm_options );
 190
 191    g_free ( uri );
 192    return res;
 193 }
 194 #endif
 195
 196 static int osm_cycle_download ( MapCoord *src, const gchar *dest_fn )
 197 {
 198    int res = -1;
 199    gchar *uri = g_strdup_printf ( "/tiles/cycle/%d/%d/%d.png", 17-src->scale, src->x, src->y );
 200    res = a_http_download_get_url ( "andy.sandbox.cloudmade.com", uri, dest_fn, &osm_options );
 201    g_free ( uri );
 202    return res;
 203 }