proj_define.h

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/*
   0 = Geographic
   1 = Universal Transverse Mercator (UTM)
   2 = State Plane Coordinates
   3 = Albers Conical Equal Area
   4 = Lambert Conformal Conic
   5 = Mercator
   6 = Polar Stereographic
   7 = Polyconic
   8 = Equidistant Conic
   9 = Transverse Mercator
  10 = Stereographic
  11 = Lambert Azimuthal Equal Area
  12 = Azimuthal Equidistant
  13 = Gnomonic
  14 = Orthographic
  15 = General Vertical Near-Side Perspective
  16 = Sinusiodal
  17 = Equirectangular
  18 = Miller Cylindrical
  19 = Van der Grinten
  20 = (Hotine) Oblique Mercator 
  21 = Robinson
  22 = Space Oblique Mercator (SOM)
  23 = Alaska Conformal
  24 = Interrupted Goode Homolosine 
  25 = Mollweide
  26 = Interrupted Mollweide
  27 = Hammer
  28 = Wagner IV
  29 = Wagner VII
  30 = Oblated Equal Area
  99 = User defined
 */
 
#define GEO 0
#define UTM 1
#define SPCS 2
#define ALBERS 3
#define LAMCC 4
#define MERCAT 5
#define PS 6
#define POLYC 7
#define EQUIDC 8
#define TM 9
#define STEREO 10
#define LAMAZ 11
#define AZMEQD 12
#define GNOMON 13
#define ORTHO 14
#define GVNSP 15
#define SNSOID 16
#define EQRECT 17
#define MILLER 18
#define VGRINT 19
#define HOM 20
#define ROBIN 21
#define SOM 22
#define ALASKA 23
#define GOOD 24
#define MOLL 25
#define IMOLL 26
#define HAMMER 27
#define WAGIV 28
#define WAGVII 29
#define OBEQA 30
#define USDEF 99 
 
#define IN_BREAK -2
#define COEFCT 15  /*  projection coefficient count      */
#define PROJCT 31  /*  projection count              */
#define DATMCT 20  /*  datum count                   */
 
#define MAXPROJ 30  /*  Maximum projection number */
#define MAXUNIT 5  /*  Maximum unit code number */
#define GEO_TERM 0  /*  Array index for print-to-term flag */
#define GEO_FILE 1  /*  Array index for print-to-file flag */
#define GEO_TRUE 1  /*  True value for geometric true/false flags */
#define GEO_FALSE -1  /*  False val for geometric true/false flags */
 
#ifndef PI
#define PI  3.14159265358979323846
#endif
#define HALF_PI 1.57079632679489661923
#define TWO_PI  6.28318530717958647692
#define EPSLN 1.0e-10
#define R2D     57.2957795131
/*
#define D2R     0.0174532925199
 */
#define D2R     1.745329251994328e-2
#define S2R 4.848136811095359e-6
 
#define OK 0
#define ERROR  -1
 
/* Misc macros
  -----------*/
#define SQUARE(x)       x * x   /* x**2 */
#define CUBE(x)     x * x * x   /* x**3 */
#define QUAD(x) x * x * x * x   /* x**4 */
 
#define GMAX(A, B)      ((A) > (B) ? (A) : (B)) /* assign maximum of a and b */
#define GMIN(A, B)      ((A) < (B) ? (A) : (B)) /* assign minimum of a and b */
 
#define IMOD(A, B)      (A) - (((A) / (B)) * (B)) /* Integer mod function */
 
#define sincos SinCos