1 files changed, 38 insertions, 0 deletions
diff --git a/src/projections/wag2.cpp b/src/projections/wag2.cpp
new file mode 100644
index 00000000..1bee737a
--- /dev/null
+++ b/src/projections/wag2.cpp
@@ -0,0 +1,38 @@
+#define PJ_LIB__
+
+#include <math.h>
+
+#include "projects.h"
+
+PROJ_HEAD(wag2, "Wagner II") "\n\tPCyl, Sph";
+
+#define C_x 0.92483
+#define C_y 1.38725
+#define C_p1 0.88022
+#define C_p2 0.88550
+
+
+static XY s_forward (LP lp, PJ *P) {           /* Spheroidal, forward */
+    XY xy = {0.0,0.0};
+	lp.phi = aasin (P->ctx,C_p1 * sin (C_p2 * lp.phi));
+	xy.x = C_x * lp.lam * cos (lp.phi);
+	xy.y = C_y * lp.phi;
+	return (xy);
+}
+
+
+static LP s_inverse (XY xy, PJ *P) {           /* Spheroidal, inverse */
+    LP lp = {0.0,0.0};
+	lp.phi = xy.y / C_y;
+	lp.lam = xy.x / (C_x * cos(lp.phi));
+	lp.phi = aasin (P->ctx,sin(lp.phi) / C_p1) / C_p2;
+	return (lp);
+}
+
+
+PJ *PROJECTION(wag2) {
+    P->es = 0.;
+    P->inv = s_inverse;
+    P->fwd = s_forward;
+    return P;
+}