30-m Topographic Wetness Index

The lidar Topographic Wetness Index (TWI) is the TWI data product produced and distributed by the National Park Service, Great Smoky Mountains National Park. Concave, low gradient areas will gather water (low TWI values), whereas steep, convex areas will shed water (high TWI values). Values range range from less than 1 (dry cells) to greater than 20 (wet cells).

Data and Resources

Field Value
accessLevel public
bureauCode {010:24}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://ddi.doi.gov/nps-data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier http://datainventory.doi.gov/id/dataset/nps-datastore-2208650
issued 2014-03-17T00:00:00Z
landingPage https://irma.nps.gov/DataStore/Reference/Profile/2208650
modified 2014-03-17T00:00:00Z
old-spatial -84.02396,35.4183655,-82.99266,35.84451
programCode {010:119,010:118}
publisher National Park Service
resource-type Dataset
source_datajson_identifier true
source_hash 1d0bd2ab3a09b02d9643bee953ca4b8c76675ee2bd333bda63b287b1d8bac1d8
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-84.02396, 35.4183655], [-84.02396, 35.84451], [-82.99266, 35.84451], [-82.99266, 35.4183655], [-84.02396, 35.4183655]]]}
theme {"Raster Dataset"}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • aphn
  • appalachian-highlands-network
  • blockhouse-tn
  • blount-county
  • bryson-city-nc
  • bunches-bald-nc
  • cades-cove-tn
  • calderwood-tn
  • clingmans-dome-nc
  • cocke-county
  • cove-creek-gap-nc
  • dellwood-nc
  • dem
  • digital-elevation-model
  • digital-terrain-model
  • dtm
  • ecological-framework-geology-and-soils-geomorphology-hillslope-features-and-processes
  • ecological-framework-water-hydrology-surface-water-dynamics
  • elevation
  • fines-creek-nc
  • fontana-dam-nc
  • gatlinburg-tn
  • geoscientific-information
  • graham-county
  • great-smoky-mountains-national-park
  • grid
  • grsm
  • hartford-tn
  • haywood-county
  • high-resolution
  • hillslope-wetness-index
  • jones-cove-tn
  • kinzel-springs-tn
  • lidar
  • light-detection-and-ranging
  • location
  • luftee-knob-nc
  • mount-guyot-tn
  • mount-le-conte-tn
  • national-standards-for-spatial-digital-accuracy-nssda
  • natural-resource-inventory-and-monitoring-program
  • nc
  • noland-creek-nc
  • none
  • north-carolina
  • nrim
  • pigeon-forge-tn
  • richardson-cove-tn
  • sero
  • sevier-county
  • silers-bald-nc
  • smokemont-nc
  • southeast-region
  • surface-model
  • swain-county
  • tallassee-tn
  • tapoco-nc
  • tennessee
  • terrain
  • thunderhead-mountain-nc
  • tn
  • topographic-wetness-index
  • topography
  • tuskeegee-nc
  • twi
  • u-s
  • united-states
  • us
  • usa
  • water
  • waterville-tn
  • wear-cove-tn
  • whittier-nc
isopen False
license_id notspecified
license_title License not specified
maintainer NPS IRMA Help
maintainer_email NRSS_DataStore@nps.gov
metadata_created 2025-09-24T20:24:25.988454
metadata_modified 2025-09-24T20:24:25.988464
notes The lidar Topographic Wetness Index (TWI) is the TWI data product produced and distributed by the National Park Service, Great Smoky Mountains National Park. Concave, low gradient areas will gather water (low TWI values), whereas steep, convex areas will shed water (high TWI values). Values range range from less than 1 (dry cells) to greater than 20 (wet cells).
num_resources 2
num_tags 81
title 30-m Topographic Wetness Index