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Photogrammetry-derived digital surface model and orthoimagery of land areas near Resurrection Bay, Alaska

Dates

Publication Date
Time Period
2015
File Modification Date
2018-01-12 11:29:00

Citation

Balazs, M.S., Wolken, G.J., and Wikstrom Jones, Katreen, 2018, Photogrammetry-derived digital surface model and orthoimagery of land areas near Resurrection Bay, Alaska: Alaska Division of Geological & Geophysical Surveys, http://doi.org/10.14509/29824.

Summary

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 [...]

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Attached Files

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Purpose

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. This file was created for ongoing investigation of the impact of flooding, slope instability, and cryosphere hazards on infrastructure and public safety in the the Resurrection Bay watershed. Data were collected on August 13, 2015.

Additional Information

Identifiers

Type Scheme Key
processingUrl http://www.dggs.alaska.gov/metadata/RDF2018-2-orthoimage.xml

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