1-- gnomonic projection and its inverse
2
3CREATE FUNCTION gnomonic_proj(spoint, spoint)
4RETURNS point
5AS 'MODULE_PATHNAME'
6LANGUAGE C IMMUTABLE STRICT;
7
8COMMENT ON FUNCTION gnomonic_proj(spoint, spoint) IS
9'gnomonic projection, the second argument is the tangential point';
10
11CREATE FUNCTION gnomonic_inv(point, spoint)
12RETURNS spoint
13AS 'MODULE_PATHNAME'
14LANGUAGE C IMMUTABLE STRICT;
15
16COMMENT ON FUNCTION gnomonic_inv(point, spoint) IS
17'inverse of gnomonic projection, the second argument is the tangential point';
18