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f6171fe3 EB |
1 | /* |
2 | * viking -- GPS Data and Topo Analyzer, Explorer, and Manager | |
3 | * | |
4 | * Copyright (C) 2003-2008, 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 | ||
ad0a8c2d EB |
22 | #ifndef __VIKING_DEM_H |
23 | #define __VIKING_DEM_H | |
24 | ||
27d52569 | 25 | #define VIK_DEM_INVALID_ELEVATION -32768 |
ad0a8c2d EB |
26 | |
27 | /* unit codes */ | |
28 | #define VIK_DEM_HORIZ_UTM_METERS 2 | |
29 | #define VIK_DEM_HORIZ_LL_ARCSECONDS 3 | |
30 | ||
31 | #define VIK_DEM_VERT_DECIMETERS 2 | |
32 | ||
70147e60 EB |
33 | #define VIK_DEM_VERT_METERS 1 /* wrong in 250k? */ |
34 | ||
35 | ||
ad0a8c2d EB |
36 | typedef struct { |
37 | guint n_columns; | |
38 | GPtrArray *columns; | |
39 | ||
70147e60 EB |
40 | guint8 horiz_units; |
41 | guint8 orig_vert_units; /* original, always converted to meters when loading. */ | |
ad0a8c2d EB |
42 | gdouble east_scale; /* gap between samples */ |
43 | gdouble north_scale; | |
44 | ||
45 | gdouble min_east, min_north, max_east, max_north; | |
46 | ||
47 | guint8 utm_zone; | |
48 | gchar utm_letter; | |
49 | } VikDEM; | |
50 | ||
51 | typedef struct { | |
52 | /* east-west coordinate for ALL items in the column */ | |
53 | gdouble east_west; | |
54 | ||
55 | /* coordinate of northern and southern boundaries */ | |
56 | gdouble south; | |
57 | // gdouble north; | |
58 | ||
59 | guint n_points; | |
60 | gint16 *points; | |
61 | } VikDEMColumn; | |
62 | ||
63 | ||
64 | VikDEM *vik_dem_new_from_file(const gchar *file); | |
65 | void vik_dem_free ( VikDEM *dem ); | |
66 | gint16 vik_dem_get_xy ( VikDEM *dem, guint x, guint y ); | |
67 | ||
68 | gint16 vik_dem_get_east_north ( VikDEM *dem, gdouble east, gdouble north ); | |
5ef1d57e | 69 | gint16 vik_dem_get_simple_interpol ( VikDEM *dem, gdouble east, gdouble north ); |
c81a5cd7 | 70 | gint16 vik_dem_get_shepard_interpol ( VikDEM *dem, gdouble east, gdouble north ); |
5ef1d57e | 71 | gint16 vik_dem_get_best_interpol ( VikDEM *dem, gdouble east, gdouble north ); |
ad0a8c2d EB |
72 | |
73 | void vik_dem_east_north_to_xy ( VikDEM *dem, gdouble east, gdouble north, guint *col, guint *row ); | |
74 | ||
75 | #endif |