[mapguide-internals] tile edge effects using gdal provider in tiled mode

Paul Spencer pspencer at dmsolutions.ca
Tue Feb 20 11:11:14 EST 2007

I've got a client using the GDAL provider to render an ECW file.   
He's set up the map/viewer to use tiles rather than straight map  
draws and he is getting some edge effects (white lines in this case)  
in his tiles.  I've attached a small screengrab of part of the problem.

Any ideas?  Could this be a problem with the provider or is it more  
likely a problem elsewhere?  Note that the edge effects do not appear  
on every tile, nor on every edge of every tile, so perhaps it is a  
rounding issue in tile generation somewhere?  Or in the provider?

|Paul Spencer                          pspencer at dmsolutions.ca    |
|Chief Technology Officer                                         |
|DM Solutions Group Inc                http://www.dmsolutions.ca/ |

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