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Click image to view current layer on interactive map. Above static image does not reflect current conditions.

Tech & Sources

GDAL, PostgreSQL/PostGIS, MapServer, Apache

SQL, Bash

Data Sources (one or more):
U.S. Geological Survey (USGS), U.S. Forest Service (USFS), National Elevation Data (NED), National Land Cover Data(NLCD), National Hydrography Data (NHD), Tiger/Line Census, 3D Elevation Program (3DEP), Geographic Names Information Service (GNIS), Open Street Map (OSM), Protected Areas Database v2.1 (PAD), National Interagency Fire Center (NIFC), National Weather Service (NWS), NASA, NOAA, National Wildfire Coordinating Group (NWCG),, U.S. Department of Interior (DOI), National Digital Forecast Database (NDFD), European Space Agency (ESA),, ESRI, Google, Continental Divide Trail Coalition, Appalachian Trail Conservancy (ATC), National Snow and Ice Data Center (NSIDC), PRISM Climate Data Oregon State University, et al, and data collected in the field (trail trace)


Image: 20 meter Sentinel 2, 8 day snow cover San Juan Mountains in New Mexico/Colorado.

Download Sentinel manifest and discover newly available rasters from ESA using Bash script daily. Wget new rasters and merge 8 days rasters into single raster. Sentinel is only available for specific areas. In this case the San Juans. The WMS/WMTS layer is served by Apache/MapServer as defined by the sanjuansscl layer.

WMS Resource:

Interactive map using WMTS:
   &sanjuansscl=1 © 2005-2024 - W3C - @postholer