X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=src%2Fgis-world.h;h=3a347808e109c3ba50a9c311f6752382c726c753;hb=bc5aa14663ac94d7feae1600db18bac3fbbea1a0;hp=7994df2a96e70e22504b80228d4ad8407f983fad;hpb=ac7156bd84aef88b712f117f7e2f3d847d371719;p=grits

diff --git a/src/gis-world.h b/src/gis-world.h
index 7994df2..3a34780 100644
--- a/src/gis-world.h
+++ b/src/gis-world.h
@@ -26,6 +26,10 @@
 
 #define EARTH_R (6371000)
 #define EARTH_C (2*M_PI*EARTH_R)
+#define NORTH  90
+#define SOUTH -90
+#define EAST  180
+#define WEST -180
 
 /**
  * Terms
@@ -86,6 +90,9 @@ void lle2xyz(gdouble lat, gdouble lon, gdouble elev,
 void xyz2lle(gdouble x, gdouble y, gdouble z,
 		gdouble *lat, gdouble *lon, gdouble *elev);
 
+void xyz2ll(gdouble x, gdouble y, gdouble z,
+		gdouble *lat, gdouble *lon);
+
 gdouble ll2m(gdouble lon_dist, gdouble lat);
 
 gdouble distd(gdouble *a, gdouble *b);