1 files changed, 17 insertions, 16 deletions

diff --git a/examples/pj_obs_api_mini_demo.c b/examples/pj_obs_api_mini_demo.c
index 3df94e2d..5cd5efe4 100644
--- a/examples/pj_obs_api_mini_demo.c
+++ b/examples/pj_obs_api_mini_demo.c
@@ -1,6 +1,6 @@
 /*******************************************************************************
-    Tiny test of an evolving new API, demonstrating simple examples of
-    2D and 3D transformations.
+    Simple example code demonstrating use of the proj.h API for 2D coordinate
+    transformations.
 
     The main transformation setup object is PJ, well known from the two
     former proj APIs (projects.h and proj_api.h)
@@ -42,7 +42,7 @@
 int main (void) {
     PJ_CONTEXT *C;
     PJ *P;
-    PJ* P_for_GIS;
+    PJ *norm;
     PJ_COORD a, b;
 
     /* or you may set C=PJ_DEFAULT_CTX if you are sure you will     */
@@ -54,35 +54,36 @@ int main (void) {
                                 "+proj=utm +zone=32 +datum=WGS84", /* or EPSG:32632 */
                                 NULL);
 
-    if (0==P) {
-        fprintf(stderr, "Oops\n");
+    if (0 == P) {
+        fprintf(stderr, "Failed to create transformation object.\n");
         return 1;
     }
 
     /* This will ensure that the order of coordinates for the input CRS */
     /* will be longitude, latitude, whereas EPSG:4326 mandates latitude, */
     /* longitude */
-    P_for_GIS = proj_normalize_for_visualization(C, P);
-    if( 0 == P_for_GIS )  {
-        fprintf(stderr, "Oops\n");
+    norm = proj_normalize_for_visualization(C, P);
+    if (0 == norm) {
+        fprintf(stderr, "Failed to normalize transformation object.\n");
         return 1;
     }
     proj_destroy(P);
-    P = P_for_GIS;
+    P = norm;
 
     /* a coordinate union representing Copenhagen: 55d N, 12d E    */
     /* Given that we have used proj_normalize_for_visualization(), the order of
     /* coordinates is longitude, latitude, and values are expressed in degrees. */
-    a = proj_coord (12, 55, 0, 0);
+    a = proj_coord(12, 55, 0, 0);
 
     /* transform to UTM zone 32, then back to geographical */
-    b = proj_trans (P, PJ_FWD, a);
-    printf ("easting: %.3f, northing: %.3f\n", b.enu.e, b.enu.n);
-    b = proj_trans (P, PJ_INV, b);
-    printf ("longitude: %g, latitude: %g\n", b.lp.lam, b.lp.phi);
+    b = proj_trans(P, PJ_FWD, a);
+    printf("easting: %.3f, northing: %.3f\n", b.enu.e, b.enu.n);
+
+    b = proj_trans(P, PJ_INV, b);
+    printf("longitude: %g, latitude: %g\n", b.lp.lam, b.lp.phi);
 
     /* Clean up */
-    proj_destroy (P);
-    proj_context_destroy (C); /* may be omitted in the single threaded case */
+    proj_destroy(P);
+    proj_context_destroy(C); /* may be omitted in the single threaded case */
     return 0;
 }