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NLCD Urban Areas

NLCD Urban Areas

Click image to view New York area layer on interactive map. Southern California shown.

Tech & Sources

Software
GDAL, PostgreSQL/PostGIS, MapServer, Apache

Languages
Bash, SQL

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)

Notes

Image: NLCD 2019 urban areas of all densities for Southern California.

Process:
NLCD is downloaded by wget in Bash script. Out of band raster tiles are imported into database using raster2pgsql. The WMS/WMTS layer is served by Apache/MapServer as defined by the nlcdurban.map file.

WMS Resource:
https://gis.postholer.com/services/reflect?
   layers=nlcdlite,nlcdurban,demshade,countylines,statelines,pop
   &bbox=-119.96,32.55,-115.29,34.56
   &trail_id=1
   &ids=4
   &width=1024
   &t_srs=EPSG:3857
   &format=image/png

Interactive map using WMTS:
https://www.postholer.com/google-map/Appalachian-Trail/3?
   vw=6
   &zoom=8
   &lat=41.281292
   &lon=-73.380973
   &nlcdurban=1

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