Tech & Sources
Software
GDAL, PostgreSQL/PostGIS, MapServer, Apache
Languages
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), AirNOW.gov, U.S. Department of Interior (DOI), National Digital Forecast Database (NDFD), European Space Agency (ESA), USAFacts.org, 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)
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Notes
Image: NDFD daily gradient temperatures.
Process:
NDFD Temperature raster is downloaded daily by wget in Bash script and processed with gdal_warp, gdal_translate and saved. The WMS/WMTS layer is served by Apache/MapServer as defined by the ndfdtemp layer in the ndfd.map file and further defined by the element and ndfdband parameters.
WMS Resource:
https://gis.postholer.com/services/reflect?
layers=ndfdtemp,countylines,statelines,trace,pop,milemarker
&trail_id=1
&ids=2,3,17
&t_srs=EPSG:3857
&width=1024
&bbox=-126,23,-66,50
&element=maxt
&ndfdband=1
Interactive map using WMTS:
https://www.postholer.com/google-map/Continental-Divide-Trail/2?
vw=6
&zoom=5
&lat=39.733172
&lon=-99.189895
&maxtDay1=1
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