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Web Apps

Web Apps

Click image to access app.

Tech & Sources

PostgreSQL/PostGIS, MapServer, Apache, TurfJS, LocalForage, ChartJS, Hyperlist

JavaScript, PHP, SQL, Bash, GNUPlot

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: PHTrails Web App.

PHTrails is a fully functional web app used on trail with or without internet connectivity. The app will geo-locate you with regard to your relationship to the trail and supply information about that trail location notably with the 'Databook' feature. Also creates elevation profile at your location, weather forecasts (requires network) and 'Check-In' feature (requries network) to contact others. © 2005-2022 - W3C - @postholer