Fixed rounding error in WMS client

When using a tile size of 256 in Web Mercator the cascaded WMS request could be computed to a height or width of 257.
MapServer · Mar 9, 2021 · a13351f · a13351f
1 parent 6f4da6e
commit a13351f
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/mapwmslayer.c b/mapwmslayer.c
@@ -734,8 +734,8 @@ msBuildWMSLayerURL(mapObj *map, layerObj *lp, int nRequestType,
 
         msRectIntersect( &bbox, &layer_rect );
 
-        bbox_width = ceil((bbox.maxx - bbox.minx) / cellsize);
-        bbox_height = ceil((bbox.maxy - bbox.miny) / cellsize);
+        bbox_width = round((bbox.maxx - bbox.minx) / cellsize);
+        bbox_height = round((bbox.maxy - bbox.miny) / cellsize);
 
         /* Force going through the resampler if we're going to receive a clipped BBOX (#4931) */
         if(msLayerGetProcessingKey(lp, "RESAMPLE") == NULL) {

diff --git a/msautotest/gdal/expected/wmsclient_3543.png b/msautotest/gdal/expected/wmsclient_3543.png