I have been using gdal wms layers to view various basemaps in QGIS. I am using this technique rather than open layers because this I can reproject gdal WMS layers as needed.
When I get close to the max zoom on my google layer my images become discolored (sometimes all in blues, other times yellows). I have checked my layer settings to ensure that my color band settings are correct.
I only have this problem when using a google maps layer, I have not seen any problems with other gdal wms layers.
I have checked for this problem in both the 32bit and 64 bit versions of qgis on multiple windows 7 computers. I only observed this problem on the 32 bit version.
Also is there any way to make qgis log my tile requests?
The layer xml is below.
<GDAL_WMS>
<Service name="TMS">
<ServerUrl>http://mt.google.com/vt/lyrs=y&x=${x}&y=${y}&z=${z}</ServerUrl>
</Service>
<DataWindow>
<UpperLeftX>-20037508.34</UpperLeftX>
<UpperLeftY>20037508.34</UpperLeftY>
<LowerRightX>20037508.34</LowerRightX>
<LowerRightY>-20037508.34</LowerRightY>
<TileLevel>19</TileLevel>
<TileCountX>1</TileCountX>
<TileCountY>1</TileCountY>
<YOrigin>top</YOrigin>
</DataWindow>
<Projection>EPSG:3857</Projection>
<BlockSizeX>256</BlockSizeX>
<BlockSizeY>256</BlockSizeY>
<BandsCount>3</BandsCount>
<Cache>
<Depth>2</Depth>
<Extension>.jpg</Extension>
</Cache>
</GDAL_WMS>