[mapserver-commits] r7508 - trunk/mapserver

[svn at osgeo.org]

Author: warmerdam
Date: 2008-04-09 14:57:12 -0400 (Wed, 09 Apr 2008)
New Revision: 7508

Modified:
   trunk/mapserver/mapserv.c
Log:
add some explanation of the magic lat/long recognition code

Modified: trunk/mapserver/mapserv.c
===================================================================
--- trunk/mapserver/mapserv.c	2008-04-09 17:46:44 UTC (rev 7507)
+++ trunk/mapserver/mapserv.c	2008-04-09 18:57:12 UTC (rev 7508)
@@ -393,7 +393,15 @@
         msFreeCharArray(tokens, 4);
     
 #ifdef USE_PROJ
-        /* make sure both coordinates are in range! */
+        /* 
+         * If there is a projection in the map file, and it is not lon/lat, and the 
+         * extents "look like" they *are* lon/lat, based on their size,
+         * then convert the extents to the map file projection.
+         *
+         * DANGER: If the extents are legitimately in the mapfile projection
+         *         and coincidentally fall in the lon/lat range, bad things
+         *         will ensue.
+         */
         if(msObj->Map->projection.proj && !pj_is_latlong(msObj->Map->projection.proj)
            && (msObj->Map->extent.minx >= -180.0 && msObj->Map->extent.minx <= 180.0) 
            && (msObj->Map->extent.miny >= -90.0 && msObj->Map->extent.miny <= 90.0)