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

July 27, 2022 airborne lidar survey of the upper Barry Arm fjord in southcentral Alaska, collected by the State of Alaska. The data provide a classified point cloud, digital terrain model (DTM), surface model (DSM), and intensity model to assess landslide movement during snow-free conditions. These data are published as Raw Data File 2026-9 by the Alaska Division of Geological & Geophysical Surveys (DGGS).

Use Cases

• Monitor landslide displacement over time based on repeat digital surface model (DSM) surveys.
• Model terrain and ground surface characteristics based on the digital terrain model (DTM) and surface model (DSM).
• Analyze surface reflectance properties based on the lidar intensity model.
• Classify ground vs. non-ground points for geomorphic analysis based on the classified point cloud.

Strengths

• Data collected during near snow-free ground conditions, which is specified as a goal for assessing landslide movement.
• Includes multiple derived products: a classified point cloud, DTM, DSM, and intensity model.
• Airborne data and ground control were collected on a specific date (July 27, 2022) and processed with industry-standard software (Terrasolid and ArcGIS).

Limitations

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

Provenance

Source

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

Collection Method

Airborne lidar survey and ground control collection, processed in Terrasolid and ArcGIS.

Time Range

July 27, 2022.

Freshness

Last updated 2026-03-08 03:04:16.749575; freshness should be verified.

Geography

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