1 files changed, 28 insertions, 0 deletions
diff --git a/src/projections/larr.cpp b/src/projections/larr.cpp
new file mode 100644
index 00000000..e4d5d240
--- /dev/null
+++ b/src/projections/larr.cpp
@@ -0,0 +1,28 @@
+#define PJ_LIB__
+
+#include <math.h>
+
+#include "projects.h"
+
+PROJ_HEAD(larr, "Larrivee") "\n\tMisc Sph, no inv";
+
+#define SIXTH .16666666666666666
+
+
+static XY s_forward (LP lp, PJ *P) {           /* Spheroidal, forward */
+    XY xy = {0.0,0.0};
+    (void) P;
+
+    xy.x = 0.5 * lp.lam * (1. + sqrt(cos(lp.phi)));
+    xy.y = lp.phi / (cos(0.5 * lp.phi) * cos(SIXTH * lp.lam));
+    return xy;
+}
+
+
+PJ *PROJECTION(larr) {
+
+    P->es = 0;
+    P->fwd = s_forward;
+
+    return P;
+}