I am exporting a GeoTIFF raster to Google Maps tiles and am getting unwanted anti-aliasing, but only at zoom levels 0 through 12 (zoom levels 13 through 15 are not anti-aliased, which is what I want). I am using Global Mapper 10.02. Here are exact steps for reproducing:
- Open "test.tif"
- File > Export Web Formats (Google Maps, VE, WW, etc.) > Export Google Maps Tiles...
- Choose "Level 15 - 4.8 meters/pixel"
- Enter "16" for number of zoom levels to use (will create Z0 through Z15)
- Click "OK"
- In the resulting files, open Z12\1634\2737.png in an image editor. Zoom in. Note that it has anti-aliasing. Now open Z13\3269\5475.png. Note that it has no anti-aliasing.
I have attached "test.zip" which contains "test.tif" and a folder called "test" containing the output of the Google Maps tiles I created.
How can I configure Global Mapper to never anti-alias when exporting to Google Maps tiles?