Lidar Elevation Data for Barry Arm Landslide, Alaska, October 2022

Upper Barry Arm fjord in southcentral Alaska is covered by lidar-derived elevation data collected on October 14, 2022. The State of Alaska provides a classified point cloud, digital terrain model (DTM), surface model (DSM), and intensity model, with a focus on the Barry Arm landslide near Whittier. The survey aimed to provide snow-free baseline data for assessing landslide movement through repeat surveys.

Use Cases

• Modeling landslide movement and deformation based on the digital terrain model (DTM).
• Analyzing surface features and vegetation cover based on the digital surface model (DSM).
• Assessing ground control accuracy by comparing airborne data from October 2022 with ground control points from July 2022.
• Creating baseline elevation maps for repeat survey comparison to monitor geologic hazards.

Strengths

• Data collected during near snow-free ground conditions on a specific date (October 14, 2022).
• Includes multiple derived products: classified point cloud, DTM, DSM, and intensity model.
• Ground control points were collected on July 27, 2022, for accuracy validation.

Limitations

• Row count and file size are unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data may reflect geographic bias inherent to the single fjord study area.

Provenance

Source

State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS).

Collection Method

Airborne lidar data collected on October 14, 2022, and processed in Terrasolid and ArcGIS.

Time Range

Primary data collection on October 14, 2022; ground control on July 27, 2022.

Freshness

Last updated 2026-03-15 03:17:29.647803; freshness should be verified.

Geography

Upper Barry Arm fjord, northeast of Whittier in Prince William Sound, southcentral Alaska.