Static FilesSupported File FormatsStyling Raster LayersUnknown ProjectionsProcessingTile URLsExample: David Rumsey Maps
Static Files
Supported File Formats
Felt can read raster data like aerial and satellite imagery, Digital Elevation Models (DEMs), surface temperature measurements in a variety of formats:
- GeoTIFFs (
.tif,.tiff)
- Raster Geopackages (
.gpkg)
- ASCII grids (
.asc,.xyz)
- Common image formats like PNG and JPEG if an auxiliary World File (
.wld,.pnw,.jpw, etc) is provided.
Styling Raster Layers
You can control the opacity, legend and position of a raster layer relative to the basemap in the Style Editor. Learn more about layer styling in the Styling Vector Data page
Unknown Projections
Most raster formats include relevant information about the Coordinate Reference System the data is in. However, if no such metadata is found, Felt will assume coordinates to be in latitude & longitude (when inside bounds) or Webmercator meters.
Processing
For adequate display, Felt will convert the source data to PNGs with values fitted to the 0-255 range. This might mean some colors may appear slightly different from the original data.
Color tables (paletted values) and No Data values will be respected if present.