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
35 #include "vikmapslayer.h"
37 #include "terraserver.h"
39 static gboolean
terraserver_topo_coord_to_mapcoord ( const VikCoord
*src
, gdouble xmpp
, gdouble ympp
, MapCoord
*dest
);
40 static int terraserver_topo_download ( MapCoord
*src
, const gchar
*dest_fn
);
42 static gboolean
terraserver_aerial_coord_to_mapcoord ( const VikCoord
*src
, gdouble xmpp
, gdouble ympp
, MapCoord
*dest
);
43 static int terraserver_aerial_download ( MapCoord
*src
, const gchar
*dest_fn
);
45 static gboolean
terraserver_urban_coord_to_mapcoord ( const VikCoord
*src
, gdouble xmpp
, gdouble ympp
, MapCoord
*dest
);
46 static int terraserver_urban_download ( MapCoord
*src
, const gchar
*dest_fn
);
48 static void terraserver_mapcoord_to_center_coord ( MapCoord
*src
, VikCoord
*dest
);
50 static DownloadOptions terraserver_options
= { NULL
, 0, a_check_map_file
};
52 void terraserver_init () {
53 VikMapsLayer_MapType map_type_1
= { 2, 200, 200, VIK_VIEWPORT_DRAWMODE_UTM
, terraserver_topo_coord_to_mapcoord
, terraserver_mapcoord_to_center_coord
, terraserver_topo_download
};
54 VikMapsLayer_MapType map_type_2
= { 1, 200, 200, VIK_VIEWPORT_DRAWMODE_UTM
, terraserver_aerial_coord_to_mapcoord
, terraserver_mapcoord_to_center_coord
, terraserver_aerial_download
};
55 VikMapsLayer_MapType map_type_3
= { 4, 200, 200, VIK_VIEWPORT_DRAWMODE_UTM
, terraserver_urban_coord_to_mapcoord
, terraserver_mapcoord_to_center_coord
, terraserver_urban_download
};
57 maps_layer_register_type("Terraserver Topos", 2, &map_type_1
);
58 maps_layer_register_type("Terraserver Aerials", 1, &map_type_2
);
59 maps_layer_register_type("Terraserver Urban Areas", 4, &map_type_3
);
62 #define TERRASERVER_SITE "terraserver-usa.com"
63 #define MARGIN_OF_ERROR 0.001
65 static int mpp_to_scale ( gdouble mpp
, guint8 type
)
69 if ( ABS(mpp
- t
) > MARGIN_OF_ERROR
)
73 case 1: return (type
== 4) ? 8 : 0;
74 case 2: return (type
== 4) ? 9 : 0;
75 case 4: return (type
!= 2) ? 10 : 0;
89 static gdouble
scale_to_mpp ( gint scale
)
91 return pow(2,scale
- 10);
94 static gboolean
terraserver_coord_to_mapcoord ( const VikCoord
*src
, gdouble xmpp
, gdouble ympp
, MapCoord
*dest
, guint8 type
)
96 g_assert ( src
->mode
== VIK_COORD_UTM
);
101 dest
->scale
= mpp_to_scale ( xmpp
, type
);
105 dest
->x
= (gint
)(((gint
)(src
->east_west
))/(200*xmpp
));
106 dest
->y
= (gint
)(((gint
)(src
->north_south
))/(200*xmpp
));
107 dest
->z
= src
->utm_zone
;
111 static gboolean
terraserver_topo_coord_to_mapcoord ( const VikCoord
*src
, gdouble xmpp
, gdouble ympp
, MapCoord
*dest
)
112 { return terraserver_coord_to_mapcoord ( src
, xmpp
, ympp
, dest
, 2 ); }
113 static gboolean
terraserver_aerial_coord_to_mapcoord ( const VikCoord
*src
, gdouble xmpp
, gdouble ympp
, MapCoord
*dest
)
114 { return terraserver_coord_to_mapcoord ( src
, xmpp
, ympp
, dest
, 1 ); }
115 static gboolean
terraserver_urban_coord_to_mapcoord ( const VikCoord
*src
, gdouble xmpp
, gdouble ympp
, MapCoord
*dest
)
116 { return terraserver_coord_to_mapcoord ( src
, xmpp
, ympp
, dest
, 4 ); }
118 static void terraserver_mapcoord_to_center_coord ( MapCoord
*src
, VikCoord
*dest
)
120 // FIXME: slowdown here!
121 gdouble mpp
= scale_to_mpp ( src
->scale
);
122 dest
->mode
= VIK_COORD_UTM
;
123 dest
->utm_zone
= src
->z
;
124 dest
->east_west
= ((src
->x
* 200) + 100) * mpp
;
125 dest
->north_south
= ((src
->y
* 200) + 100) * mpp
;
128 static int terraserver_download ( MapCoord
*src
, const gchar
*dest_fn
, guint8 type
)
131 gchar
*uri
= g_strdup_printf ( "/tile.ashx?T=%d&S=%d&X=%d&Y=%d&Z=%d", type
,
132 src
->scale
, src
->x
, src
->y
, src
->z
);
133 res
= a_http_download_get_url ( TERRASERVER_SITE
, uri
, dest_fn
, &terraserver_options
);
138 static int terraserver_topo_download ( MapCoord
*src
, const gchar
*dest_fn
)
139 { return terraserver_download ( src
, dest_fn
, 2 ); }
140 static int terraserver_aerial_download ( MapCoord
*src
, const gchar
*dest_fn
)
141 { return terraserver_download ( src
, dest_fn
, 1 ); }
142 static int terraserver_urban_download ( MapCoord
*src
, const gchar
*dest_fn
)
143 { return terraserver_download ( src
, dest_fn
, 4 ); }