FGDC Geologic Map Icons for use in MapLibre/Mapbox

Icons extracted from the FGDC Digital Cartographic Standard for Geologic Map Symbolization. Spritesheets were generated using spreet.

Includes test_server.py for testing the sprites in Maputnik.

Commands used to generate spritesheets

spreet svg fgdc_icons --ratio 4
spreet svg fgdc_icons@2x --ratio 8