1 files changed, 5 insertions, 0 deletions
diff --git a/src/Projection.H b/src/Projection.H
index 92a37c8..a003f3d 100644
--- a/src/Projection.H
+++ b/src/Projection.H
@@ -30,6 +30,11 @@ class Projection {
   double pi_d;
 
  public:
+  typedef enum {
+    TANGENTIAL = 0,
+    SPHAERIC   = 1
+  } Projection_t;
+
   Projection();
 
   virtual void set_coordinates(Hill *m, const ViewParams *parms);