Bare Earth Elevation Models for Gulf Coast Islands, 2013

Eighty-five 1-meter resolution bare earth Digital Elevation Models (DEMs) were generated from a topographic lidar survey conducted July 12-14, 2013. Photo Science, Inc., collected and processed the data under contract for the U.S. Geological Survey (USGS). The DEMs cover Dauphin Island, Alabama, and Chandeleur, Stake, Grand Gosier, and Breton Islands in Louisiana.

Use Cases

• Model coastal erosion and storm surge inundation based on high-resolution bare earth elevation data.
• Assess habitat and landform changes over time using the 1-meter spatial resolution DEMs.
• Support infrastructure planning and resource management for the specific islands covered by the survey.
• Validate and calibrate broader regional elevation models with precise local topographic data.

Strengths

• Data has a high horizontal spatial resolution of 1 meter by 1 meter.
• Eighty-five DEM tiles provide systematic coverage of the entire survey area.
• Vertical datum is precisely defined as NAVD88 (GEOID12A) in meters.

Limitations

• Last updated 2013-07-14 23:59:59.999000; freshness should be verified.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

U.S. Geological Survey (USGS), collected and processed by Photo Science, Inc.

Collection Method

Topographic lidar survey processed to identify bare earth elevations.

Time Range

July 12-14, 2013

Freshness

Last updated 2013-07 14 23:59:59.999000; freshness should be verified.

Geography

Dauphin Island, Alabama and Chandeleur, Stake, Grand Gosier and Breton Islands, Louisiana, USA.