10-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_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
dataQuality true
identifier NPS_DataStore_2208649
issued 2014-03-17
landingPage https://irma.nps.gov/DataStore/Reference/Profile/2208649
modified 2014-03-17
old-spatial -84.02396,35.4183655,-82.99266,35.84451
programCode {010:118,010:119}
publisher National Park Service
references {https://irma.nps.gov/DataStore/Reference/Profile/2208649}
resource-type Dataset
source_datajson_identifier true
source_hash 34642bad0a854e7485f6adc4a30907f3cc811231
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
  • aphn
  • appalachian-highlands-network
  • blockhouse-tn
  • blount-county
  • bryson-city-nc
  • bunches-bald-nc
  • cades-cove-tn
  • calderwood-tn
  • ckan
  • 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
  • geo
  • geoscientific-information
  • geoss
  • 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
  • national-standards-for-spatial-digital-accuracy-nssda
  • natural-resource-inventory-and-monitoring-program
  • nc
  • noland-creek-nc
  • none
  • north-america
  • 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 irma@nps.gov
metadata_created 2025-11-22T18:14:09.826673
metadata_modified 2025-11-22T18:14:09.826678
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 80
title 10-m Topographic Wetness Index