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Configuring Requests
Customise visualisation by setting bands, tile matrix, rescale values, and applying colour maps.
When forming requests you can customise:
- Band Selection (bidx): Choose which bands to display and in which order.
- Expressions (expression): Perform band maths (e.g. NDVI: (b5-b4)/(b5+b4)).
- Rescaling (rescale=MIN,MAX): Stretch data values for better contrast (e.g. &rescale=0,1000).
- Colormap (colormap_name=viridis etc.): Apply a colour palette to single-band data.
- Tile Matrix (tileMatrixSetId=WebMercatorQuad): Default is Web Mercator, but other sets are available.
- Return Mask (return_mask=true/false): Include an alpha channel to handle no-data areas.
- Preview Size (width / height / max_size on /preview endpoints): Control the dimensions of preview images.
For more advanced uses (like custom colormaps, mosaic JSON, or dynamic time-slicing), see the TiTiler documentation and the EO DataHub Swagger pages.