1 files changed, 5 insertions, 0 deletions
diff --git a/src/proj.h b/src/proj.h
index f94fb384..c0b8b7cc 100644
--- a/src/proj.h
+++ b/src/proj.h
@@ -337,6 +337,7 @@ void proj_errno_set (PJ *P, int err);
 int  proj_errno_reset (PJ *P);
 void proj_errno_restore (PJ *P, int err);
 
+
 /* Build a fully expanded proj_create() compatible representation of P */
 char *proj_definition_retrieve (PJ *P);
 /* ...and get rid of it safely */
@@ -349,6 +350,10 @@ void *proj_release (void *buffer);
 double proj_torad (double angle_in_degrees);
 double proj_todeg (double angle_in_radians);
 
+/* Check if a projection has an inverse mapping */
+int proj_has_inverse(PJ *P);
+
+
 #ifdef __cplusplus
 }
 #endif