Advanced image settings
The Advanced image settings can be accessed from the screent, that comes prior rendering by clicking on the “advanced options” button.
There are several options you can choose.
The produced tiles can be saved in one of several image format. MapTiler includes optimization of the final filesize and used number of colors (quantization), to minimize the disk size occupied by the rendered maps as well as the time necessary to transfer the maps to clients once the tiles are online.
Formats with support for transparency are:
Non-transparent formats are:
The visual quality of the output tiles is also defined by the resampling method. Selected method is used for interpolation of the values of individual pixels and it affects the sharpness vs smoothness of the produced maps.
This option is typically used to eliminate borders of multiple map sheets that are stitched together. You can set a specific color of the map to be considered fully transparent during rendering.