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Snow-Off Digital Terrain Model (DTM) shaded relief from 2010 LiDAR Niwot Ridge LTER Project Area, Colorado

Citation: Anderson, S.P., Qinghua, G., and Parrish, E.G., 2012, Snow-on and snow-off LiDAR point cloud data and digital elevation models for study of topography, snow, ecosystems, and environmental change at Boulder Creek Critical Zone Observatory, Colorado: Boulder Creek CZO, INSTAAR, University of Colorado at Boulder, digital media. This 1m Digital Terrain Model (DTM) shaded relief is a snow-off DTM derived from bare-ground Light Detection and Ranging (LiDAR) point cloud data from August 2010 for the Boulder Creek Critical Zone Observatory (CZO), near Boulder Colorado. This dataset is better suited for derived layers such as slope angle, aspect, and contours. The DTM was created from 1,375 LiDAR point cloud tiles subsampled from 10 points/m2 to 1-meter postings, acquired by the National Center for Airborne Laser Mapping (NCALM) project. This data was collected in collaboration between the Boulder Creek CZO and NCALM, both funded by the National Science Foundation (NSF). The DTM has the functionality of a map layer for use in Geographic Information Systems (GIS) or remote sensing software. Total area imaged is 598.92 km^2. The LiDAR point cloud data was acquired with an Optech Gemini Airborne Laser Terrain Mapper (ALTM) and mounted in a Piper Twin PA-31 Chieftain with Inertial Measurement Unit (IMU) at a flying height of 600 m. Data from four GPS (Global Positioning System) ground stations were used for aircraft trajectory determination. The continuous DTM surface was created by mosaicing and then kriging 0.5 x 1 km LiDAR point cloud LAS-formated tiles using Golden Software's Surfer 8 Kriging algorithm. Horizontal accuracy is at least, but usually better than, 11 cm RMSE at 1 sigma and vertical accuracy is 5-30 cm RMSE at 1 sigma. The layer is available in IMAGINE format approx. 4 GB of data. It has a UTM zone 13 projection, with a NAD83 horizonal datum and a NAVD88 vertical datum, with FGDC-compliant metadata. A shaded relief model was also generated. A similar la

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1:10,000 Soils, Niwot Ridge LTER Project Area, Colorado

Soils data digitized from 1:10,000 soils maps for most of length of Niwot Ridge. Source maps and soil classifications taken from Scott Burns' doctoral dissertation (Burns 1980). NOTE: This EML metadata file does not contain important geospatial data processing information. Before using any NWT LTER geospatial data read the ArcGIS metadata XML file in either ISO or FGDC compliant format using ArcGIS software or by viewing the .xml file provided with the geospatial dataset.

2010 Snow Survey for Green Lakes Valley, Niwot Ridge LTER, Colorado

Yearly snow surveys were conducted in the Green Lakes Valley in the City of Boulder Watershed at the estimated peak of snowpack in late spring. Over a period of several days, surveying teams (1 to several people) traversed valley slopes measuring snow depth with avalanche probes. Locations of each depth measurement were recorded as waypoints in Garmin hand-held GPS units (eTrex Legend and eTrex Legend H models). Snow depths were recorded on standardized field sheets along with dates, recorder names, waypoint numbers, and comments. GPS locations were downloaded as text files from Garmin units using Topo! software, specifying NAD83 for surveys conducted after 2009. Download files contained waypoint number, latitude, longitude, date, and elevation. Each file was imported into a Microsoft Excel spreadsheet and snow depths corresponding to waypoints were entered manually from field sheets. Shapefiles were constructed in ArcInfo/ArcGIS from dbf files generated either directly from Excel spreadsheets (before 2008) or after importing into Microsoft Access and then exporting as dbfs. All shapefiles are provided in a UTM zone 13 projection and NAD83 horizontal datum. NOTE: This EML metadata file does not contain important geospatial data processing information. Before using any NWT LTER geospatial data read the arcgis metadata XML file in either ISO or FGDC compliant format, using ArcGIS software (ArcCatalog > description), or by viewing the .xml file provided with the geospatial dataset.

2011 Snow Survey for Green Lakes Valley, Niwot Ridge LTER, Colorado

2012 Snow Survey for Green Lakes Valley, Niwot Ridge LTER, Colorado

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1982-11-23

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1982-11-23 (17:11:53.3020000Z) by Landsat 4, row 032, path 034. Cloud cover was 10 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT40340321982327XXX03, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:43:43Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1982-12-25

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1982-12-25 (17:11:47.4730250Z) by Landsat 4, row 032, path 034. Cloud cover was 0 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT40340321982359XXX04, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:43:33Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1989-06-19

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1989-06-19 (17:16:53.6460250Z) by Landsat 4, row 032, path 034. Cloud cover was 40 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT40340321989170AAA02, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:49:06Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1989-07-05

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1989-07-05 (17:16:55.6090750Z) by Landsat 4, row 032, path 034. Cloud cover was 0 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT40340321989186XXX04, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:48:37Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1989-09-07

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1989-09-07 (17:16:56.3140750Z) by Landsat 4, row 032, path 034. Cloud cover was 10 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT40340321989250XXX02, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T01:57:29Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1992-06-11

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1992-06-11 (16:50:20.6020310Z) by Landsat 4, row 032, path 034. Cloud cover was 40 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT40340321992163XXX02, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:49:59Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1984-04-10

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1984-04-10 (17:10:38.7930560Z) by Landsat 5, row 032, path 034. Cloud cover was 20 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT50340321984101XXX03, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:43:31Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1984-05-12

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1984-05-12 (17:11:00.1940250Z) by Landsat 5, row 032, path 034. Cloud cover was 27.34 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT50340321984133PAC00, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:43:10Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1984-05-28

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1984-05-28 (17:11:26.9460690Z) by Landsat 5, row 032, path 034. Cloud cover was 37.09 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT50340321984149PAC09, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:42:55Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1984-06-13

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1984-06-13 (17:11:45.4940750Z) by Landsat 5, row 032, path 034. Cloud cover was 46.98 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT50340321984165PAC04, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:43:16Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1984-06-29

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1984-06-29 (17:11:58.2420060Z) by Landsat 5, row 032, path 034. Cloud cover was 10.93 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT50340321984181PAC20, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:47:43Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1984-11-04

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1984-11-04 (17:13:25.7410190Z) by Landsat 5, row 032, path 034. Cloud cover was 20 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT50340321984309XXX02, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:42:39Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1984-11-20

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1984-11-20 (17:13:21.2760940Z) by Landsat 5, row 032, path 034. Cloud cover was 0 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT50340321984325XXX02, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:42:54Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1984-12-22

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1984-12-22 (17:13:38.6890250Z) by Landsat 5, row 032, path 034. Cloud cover was 10 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT50340321984357XXX02, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:42:35Z.

LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER collected on 1985-01-23

This LTER Remote Sensing spatial raster dataset consists of LEDAPS corrected Landsat Enhanced Thematic Mapper image data for Niwot Ridge LTER, originally collected on 1985-01-23 (17:13:51.4050810Z) by Landsat 5, row 032, path 034. Cloud cover was 0 percent. The Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) software was originally developed by the National Aeronautics and Space Administrationâ€“Goddard Space Flight Center and the University of Maryland to produce top-of-atmosphere reflectance from Landsat Thematic Mapper and Enhanced Thematic Mapper Plus Level 1 digital numbers and to apply atmospheric corrections to generate a surface-reflectance product. The U.S. Geological Survey (USGS) has adopted the LEDAPS algorithm for producing the Landsat Surface Reflectance Climate Data Record. NASA Landsat Program, 2009, Landsat TM LT50340321985023XXX04, LPGS_12.1.2, USGS, Sioux Falls, 2012-11-01T11:43:13Z.