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Imagery and Raster performance

For grid coverage data (imagery and raster):

  • Adding overlays to a raster improves performance when zoomed out

  • Adding internal tiling to a raster improves performance when zoomed in

  • The Importer REST API can perform the addition of overlays and internal tiling when processing an uploaded GeoTIFF.

  • If your raster data is too large for a single file setup an image mosaic.

    It can be worthwhile to process your image mosaic into an image pyramid (to providing at least one overview to improve the speed on all scale ranges).

  • Setting up a small image mosaic is possible with the user interface. When the mosaic is created the folder will be scanned for individual granules to form into the mosaic.

    For larger mosaic with hundreds of granules the REST API is required to manage contents (as the scan cannot complete before the user interface times out).