1 /**************************************************************************
2 * constants.h -- various constant definitions
4 * Written by Curtis Olson, started July 1997.
6 * Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * (Log is kept at end of this file)
24 **************************************************************************/
31 /* Radius of Earth in meters at the equator. Another source had
32 * 6378165 but this is probably close enough */
33 #define EARTH_RAD 6378.155
36 /* Degrees to Radians */
37 #define DEG_TO_RAD 0.017453292
39 /* Radians to Degrees */
40 #define RAD_TO_DEG 57.29577951
42 /* Arc seconds to radians */
43 #define ARCSEC_TO_RAD 4.84813681109535993589e-06
46 #define FEET_TO_METER 0.3048
49 #define METER_TO_FEET 3.28083989501312335958
56 /* Revision 1.2 1997/07/08 18:20:11 curt
57 /* Working on establishing a hard ground.
59 * Revision 1.1 1997/07/07 21:02:36 curt