new products of the usgs 3d elevation...
TRANSCRIPT
New Products of the USGS 3D Elevation Program
(3DEP)Amanda Lowe, Geographer, USGS
ESRI User Conference 2015Tuesday, July 21st, 2015
USGS 3D Elevation Program (3DEP)
3DEP Operations
3DEP Operations
Conveyance TransformerFeatherweightProject Seam
3DEP ProductsLayer
Seamless DEM2 Arc Second (~ 60 meter resolution)1 Arc Second (~ 30 meter resolution)1/3 Arc Second (~ 10 meter resolution)
Project Based DEM1/9 Arc Second (~ 3meter resolution)1 meter5 meter
Source DataSource DEM – Original Product Resolution (OPR)Digital Surface Model (DSM)Orthorectified Radar Intensity Imagery (ORI)Lidar Point Cloud
3DEP ProductsLayer
Seamless DEM2 Arc Second (~ 60 meter resolution)1 Arc Second (~ 30 meter resolution)1/3 Arc Second (~ 10 meter resolution)
Project Based DEM1/9 Arc Second (~ 3meter resolution)1 meter5 meter
Source DataSource DEM – Original Product Resolution (OPR)Digital Surface Model (DSM)Orthorectified Radar Intensity Imagery (ORI)Lidar Point Cloud
NEW to The National Map!
Seamless DEM
• 2 Arc-second, 1 Arc-second & 1/3 Arc-second
- Seamless- Geographic Coordinate System- Bare Earth- Hydroflattened- 1 Degree Blocks- Formats: ArcGrid, IMG and GridFloat
2 Arc-second
1:40,000
1 Arc-second
1:40,000
1/3 Arc-second
1:40,000
Project Based DEM
• 1/9 Arc-second
- Bare Earth- Geographic Coordinate System- 15 minute tiles- Format: IMG- No longer being updated
- Still distributed, and is presently the highest resolution standard DEM for about 25% of CONUS
Project Based DEM
• 1 meter
- Bare Earth- Universal Transverse Mercator (UTM)- Hydroflattened- 10 km tiles- Format: IMG- CONUS Only- Coverage will increase as 1 meter, or higher, resolution DEMs
are processed for 3DEP
1 meter DEM
1:10,000
Project Based DEM
• 5 meter
- Alaska only- Bare Earth- Alaska Albers- Hydroflattened- 1 Degree Blocks- Format: ArcGrid
Alaska Ifsar 5 Meter DEM
1:100,000
Alaska Ifsar 5 Meter DEM
1:40,000
Source Data
• Source DEM – Original Product Resolution (OPR)
- Bare Earth- Original Spatial Reference - Original Resolution- Any Hydro Treatment - Full Project - Format: ArcGrid- Not distributed if identical to 1 meter product
Source Data
• Digital Surface Model (DSM)
- Alaska only- Alaska Albers Projection- 5 meter- Hydroflattened- 15 Minute Tiles zipped by 1 Degree Blocks
- As Delivered- Format: TIFF
Alaska Ifsar DSM
1:40,000
Alaska Ifsar 5 Meter DEM
1:40,000
Source Data
• Orthorectified Radar Intensity Imagery (ORI)
- Alaska only- Alaska Albers Projection- 0.625 meter- 15 Minute Tiles zipped by 1 Degree Blocks
- As Delivered- Format: TIFF
Alaska Ifsar ORI
1:40,000
Source Data
• Lidar Point Cloud (LPC)
- Point Classifications- Tiled- Original Spatial Reference – As Delivered- Original Tile Size – As Delivered- Format: LAS
Lidar Point Cloud
Photo Credit: Ray Fuoto, http://panoramio.com/photo/42448850
Spatial Metadata
• Product Based
- Included with each delivery bundle
Spatial Metadata
• Full Extent
- Available directly from FTP - Link within each delivery bundle- ftp://internalrockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/El
evation/
The National Map nationalmap.gov
Access
• The National Map- http://viewer.nationalmap.gov/beta/bulk_client/
• Direct FTP Access- ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Elevation/
• Science Base- https://www.sciencebase.gov/
• GeoPlatform- https://www.geoplatform.gov
• Data.gov - http://www.data.gov/