-GisPoint *gis_point_new();
-void gis_point_set_lle(GisPoint *point, gdouble lat, gdouble lon, gdouble elev);
-void gis_point_set_xyz(GisPoint *point, gdouble x, gdouble y, gdouble z);
-void gis_point_set_coords(GisPoint *point, gdouble x, gdouble y);
-void gis_point_project(GisPoint *point, GisProjection *proj);
-GisPoint *gis_point_ref(GisPoint *point);
-void gis_point_unref(GisPoint *point);