Description
The State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced a digital surface model (DSM) and an orthorectified aerial optical image mosaic (orthoimagery) of the Resurrection Bay watershed, surrounding the city of Seward in south-central Alaska. Aerial photographs and Global Navigation Satellite System (GNSS) data were collected on August 13, 2015, and were processed using Structure-from-Motion (SfM) photogrammetric techniques to create the DSM and orthoimagery. All data are projected in UTM Zone 6 North (meters) using the NAD83 (2011; EPSG 26906) horizontal datum and NAVD88 (Geoid12A; EPOCH 2010.00) vertical datum. The project was part of an ongoing investigation of the impact of flooding, slope instability, and cryosphere hazards on infrastructure and public safety. For the purpose of enabling open access to geospatial datasets in Alaska, this collection is being released as a Raw Data File with an open end-user license. All files can be downloaded free of charge from the DGGS website (http://doi.org/10.14509/29824). The orthoimage is a three-band, 8-bit unsigned GeoTIFF file using LZW compression. The orthoimage has a GSD of 0.2 m per pixel, and the No Data value is set to 0. Variable lighting in the orthoimages may result from variable sky conditions during the time of data acquisition.
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| orthoimage | Unknown | CSDGM IMPORT ERROR: No digtinfo/formcont | Open resource |
| Web Resource | Unknown | Open resource |
Tags
- aerial
- bear creek
- bear lake
- bear lake glacier
- bear mountain
- box canyon creek
- caines head
- callisto peak
- clear creek
- derby cove
- engineering
- engineering geology
- environmental
- first lake
- fourth of july creek
- geologic
- geological process
- geologic hazards
- geology
- geomorphology
- godwin creek
- grouse lake
- hazards
- japanese creek
- lakes
- likes creek
- little bear lake
- lost creek
- lost lake trail
- lowell creek
- lowell point
- marathon mountain
- methods
- mount alice
- mount benson
- mount eva
- orthoimagery
- phoenix peak
- preachers pond
- prospect glacier
- race point
- raster image
- resurrection bay
- resurrection river
- salmon creek
- sawmill creek
- scheffler creek
- second lake
- seward
- slope
- spring creek
- spruce creek
- surface
- surficial
- surficial geology
- the lagoon
- thumb cove
- tiehacker mountain
- tonsina creek
- tonsina point
- vegetation
- water
- woodrow