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Yan Liu

UIUC/CyberGIS | Senior Research Programmer

Subject Areas: CyberGIS, high performance computing, spatial optimization, supercomputing applications

 Recent activity

ABSTRACT:

Height Above Nearest Drainage (HAND) is an approach for estimating the vertical height of any point on the landscape from the nearest stream surface or bed. This dataset is based on the U.S. Geological Survey's National Elevation Dataset (NED) with 10-meter horizontal resolution, comprising raster data for the 331 HUC-6 units in conterminous U.S. (CONUS), excluding the five units of the great lakes. This was developed at the UIUC CyberGIS supercomputing facility, and is now archived at the UT Austin TACC (Texas Advanced Computing Center) for download.

To interactively select HAND data by HUC6 basin, use the Harvey Archive Story Map [http://arcg.is/001jje] and click on the HAND tab.
To directly browse this data, visit [https://web.corral.tacc.utexas.edu/nfiedata/]. This site contains the following directories:
- HAND/ : HAND for 331 HUC6 units on CONUS, excluding the five great lakes. [https://web.corral.tacc.utexas.edu/nfiedata/HAND/]
- Harvey/ [https://web.corral.tacc.utexas.edu/nfiedata/Harvey/]
- hand/ : Single HAND geotiff for Harvey-affected area (99 counties in TX)
- flood_data/ : Additional flood model outputs from FEMA (see related resource [https://www.hydroshare.org/resource/165e2c3e335d40949dbf501c97827837/])
- docs/ : Papers and presentations [https://web.corral.tacc.utexas.edu/nfiedata/docs/]
- hydraulic-property-table/ : Hydraulic property table in NetCDF4 format [https://web.corral.tacc.utexas.edu/nfiedata/hydraulic-property-table/]
- misc/: Some useful utility files for downloading [https://web.corral.tacc.utexas.edu/nfiedata/misc/]
- ned10m/ : USGS 3DEP National Elevation Dataset 1/3 arcsec (~10m). Internal use. Download from USGS here [ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Elevation/13/]
- nhd/ : NHDPlus MR (medium resolution) and HR beta (high resolution); USGS NHD high resolution. Internal use. To download, use the following URLs:
- NHDPlus MR [http://www.horizon-systems.com/NHDPlus/V2NationalData.php]
- NHDPlus HR(beta) [ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Hydrography/NHDPlus/HU4/HighResolution/]
- NHD HR [ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Hydrography/NHD/National/HighResolution/GDB/National_NHD.zip]
- nlcd/ : USGS National Land Cover Dataset (2011). Internal use. To download, go to this link [http://www.landfire.gov/bulk/downloadfile.php?TYPE=nlcd2006&FNAME=nlcd_2006_landcover_2011_edition_2014_10_10.zip]
- vrt/ : VRT (GDAL Virtual format, http://www.gdal.org/formats_list.html) raster definition for DEM and HAND [https://web.corral.tacc.utexas.edu/nfiedata/vrt/]
- wbd/ : USGS Water Boundary Dataset. Internal use. Download from USGS here [ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Hydrography/WBD/National/GDB/WBD_National_GDB.zip]

Software
- NFIE CFIM workflow [https://github.com/cybergis/nfie-floodmap]
- TauDEM [https://github.com/dtarb/TauDEM]
- Accelerated d8flowdir and dinfflowdir in TauDEM [https://github.com/cybergis/cybergis-toolkit/tree/master/taudem]

HAND output metadata --
Assume ${HUCID} denotes the HUC6 code for each unit. This is the list of files in each HUC6 HAND directory:
- ${HUCID}-wbd.shp HUC unit boundary shape file, extracted from USGS WBD
- ${HUCID}-wbdbuf.shp HUC unit boundary shape file, extracted from USGS WBD (buffered)
- ${HUCID}-flows.shp Flowline shape file, extracted from NHDPlus V21
- ${HUCID}-inlets0.shp Inlets point shape file in the HUC unit. Native projection
- ${HUCID}-inlets.shp Inlets point shape file in the HUC unit. EPSG:4269
- ${HUCID}-weights.tif Weight grid of the rasterized inlet points
- ${HUCID}.tif Clipped HUC unit DEM from USGS 3DEP 10m elevation dataset (buffered)
- ${HUCID}fel.tif Pit-removed DEM; output of TauDEM pitremove
- ${HUCID}p.tif D8 flow direction raster; output of TauDEM d8flowdir
- ${HUCID}sd8.tif D8 slope raster; output of TauDEM d8flowdir
- ${HUCID}ang.tif Dinfinity flow direction raster; output of TauDEM dinfflowdir
- ${HUCID}slp.tif Dinfinity slope raster; output of TauDEM dinfflowdir
- ${HUCID}ssa.tif Contributing area raster; output of TauDEM aread8
- ${HUCID}src.tif Stream grid; output of TauDEM threshold (threshold=1)
- ${HUCID}dd.tif Bufferred HAND raster; output of TauDEM dinfdistdown
- ${HUCID}hand.tif HAND raster, buffer removed, final result

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ABSTRACT:

This app launches the CyberGIS-TauDEM gateway app set to take a HydroShare raster resource as an input. This app will use OAuth to authorize the access to HydroShare data from CyberGIS Gateway. The Gateway will then compute TauDEM products for the user and push results back to HydroShare on behalf of the user.

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Resources
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Collection 0
Composite Resource 0
Generic 0
Geographic Feature 0
Geographic Raster 0
HIS Referenced Time Series 0
Model Instance 0
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MODFLOW Model Instance Resource 0
Multidimensional (NetCDF) 0
Script Resource 0
SWAT Model Instance 0
Time Series 0
Web App 0
Web App Resource Web App Resource
TauDEM CyberGIS Hydrologic Terrain Analysis App
Created: Feb. 18, 2016, 11:44 p.m.
Authors: Yan Liu · David Tarboton

ABSTRACT:

This app launches the CyberGIS-TauDEM gateway app set to take a HydroShare raster resource as an input. This app will use OAuth to authorize the access to HydroShare data from CyberGIS Gateway. The Gateway will then compute TauDEM products for the user and push results back to HydroShare on behalf of the user.

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Generic Generic
Height Above Nearest Drainage (HAND) for CONUS
Created: April 21, 2018, 2:36 a.m.
Authors: Yan Liu

ABSTRACT:

Height Above Nearest Drainage (HAND) is an approach for estimating the vertical height of any point on the landscape from the nearest stream surface or bed. This dataset is based on the U.S. Geological Survey's National Elevation Dataset (NED) with 10-meter horizontal resolution, comprising raster data for the 331 HUC-6 units in conterminous U.S. (CONUS), excluding the five units of the great lakes. This was developed at the UIUC CyberGIS supercomputing facility, and is now archived at the UT Austin TACC (Texas Advanced Computing Center) for download.

To interactively select HAND data by HUC6 basin, use the Harvey Archive Story Map [http://arcg.is/001jje] and click on the HAND tab.
To directly browse this data, visit [https://web.corral.tacc.utexas.edu/nfiedata/]. This site contains the following directories:
- HAND/ : HAND for 331 HUC6 units on CONUS, excluding the five great lakes. [https://web.corral.tacc.utexas.edu/nfiedata/HAND/]
- Harvey/ [https://web.corral.tacc.utexas.edu/nfiedata/Harvey/]
- hand/ : Single HAND geotiff for Harvey-affected area (99 counties in TX)
- flood_data/ : Additional flood model outputs from FEMA (see related resource [https://www.hydroshare.org/resource/165e2c3e335d40949dbf501c97827837/])
- docs/ : Papers and presentations [https://web.corral.tacc.utexas.edu/nfiedata/docs/]
- hydraulic-property-table/ : Hydraulic property table in NetCDF4 format [https://web.corral.tacc.utexas.edu/nfiedata/hydraulic-property-table/]
- misc/: Some useful utility files for downloading [https://web.corral.tacc.utexas.edu/nfiedata/misc/]
- ned10m/ : USGS 3DEP National Elevation Dataset 1/3 arcsec (~10m). Internal use. Download from USGS here [ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Elevation/13/]
- nhd/ : NHDPlus MR (medium resolution) and HR beta (high resolution); USGS NHD high resolution. Internal use. To download, use the following URLs:
- NHDPlus MR [http://www.horizon-systems.com/NHDPlus/V2NationalData.php]
- NHDPlus HR(beta) [ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Hydrography/NHDPlus/HU4/HighResolution/]
- NHD HR [ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Hydrography/NHD/National/HighResolution/GDB/National_NHD.zip]
- nlcd/ : USGS National Land Cover Dataset (2011). Internal use. To download, go to this link [http://www.landfire.gov/bulk/downloadfile.php?TYPE=nlcd2006&FNAME=nlcd_2006_landcover_2011_edition_2014_10_10.zip]
- vrt/ : VRT (GDAL Virtual format, http://www.gdal.org/formats_list.html) raster definition for DEM and HAND [https://web.corral.tacc.utexas.edu/nfiedata/vrt/]
- wbd/ : USGS Water Boundary Dataset. Internal use. Download from USGS here [ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Hydrography/WBD/National/GDB/WBD_National_GDB.zip]

Software
- NFIE CFIM workflow [https://github.com/cybergis/nfie-floodmap]
- TauDEM [https://github.com/dtarb/TauDEM]
- Accelerated d8flowdir and dinfflowdir in TauDEM [https://github.com/cybergis/cybergis-toolkit/tree/master/taudem]

HAND output metadata --
Assume ${HUCID} denotes the HUC6 code for each unit. This is the list of files in each HUC6 HAND directory:
- ${HUCID}-wbd.shp HUC unit boundary shape file, extracted from USGS WBD
- ${HUCID}-wbdbuf.shp HUC unit boundary shape file, extracted from USGS WBD (buffered)
- ${HUCID}-flows.shp Flowline shape file, extracted from NHDPlus V21
- ${HUCID}-inlets0.shp Inlets point shape file in the HUC unit. Native projection
- ${HUCID}-inlets.shp Inlets point shape file in the HUC unit. EPSG:4269
- ${HUCID}-weights.tif Weight grid of the rasterized inlet points
- ${HUCID}.tif Clipped HUC unit DEM from USGS 3DEP 10m elevation dataset (buffered)
- ${HUCID}fel.tif Pit-removed DEM; output of TauDEM pitremove
- ${HUCID}p.tif D8 flow direction raster; output of TauDEM d8flowdir
- ${HUCID}sd8.tif D8 slope raster; output of TauDEM d8flowdir
- ${HUCID}ang.tif Dinfinity flow direction raster; output of TauDEM dinfflowdir
- ${HUCID}slp.tif Dinfinity slope raster; output of TauDEM dinfflowdir
- ${HUCID}ssa.tif Contributing area raster; output of TauDEM aread8
- ${HUCID}src.tif Stream grid; output of TauDEM threshold (threshold=1)
- ${HUCID}dd.tif Bufferred HAND raster; output of TauDEM dinfdistdown
- ${HUCID}hand.tif HAND raster, buffer removed, final result

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