Hi, everybody
we are using the GDAL WMS driver for getting maps from a public WMTS
service, http://www.basemap.at. Anyway, the resulting image does not
look smooth. In particular, I would guess that the the image was scaled
with something like a nearest neighbor algorithm.
So my question is simply, if I can switch the interpolation method in
some place.
The XML file, taken from
http://gisforge.wordpress.com/2012/11/06/basemap-at-wmts-layer-in-qgis/, is:
<GDAL_WMS>
<Service name="TMS">
<ServerUrl>http://maps.wien.gv.at/basemap/geolandbasemap/normal/google3857/${z}/${y}/${x}.jpeg</ServerUrl>
</Service>
<DataWindow>
<UpperLeftX>-20037508.34</UpperLeftX>
<UpperLeftY>20037508.34</UpperLeftY>
<LowerRightX>20037508.34</LowerRightX>
<LowerRightY>-20037508.34</LowerRightY>
<TileLevel>18</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 />
</GDAL_WMS>
The command is:
gdal_translate -srcwin 35500000 23500000 100000 100000 -of JPEG -outsize
250 250 basemap_at.xml basemap_at.jpg
As can be clearly seen, the labels are hard to read.
Reagrds,
Peter
--
Peter Hopfgartner
R3 GIS
web : www.r3-gis.com
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