2017 OLC Lidar DEM: Siskiyou

No metadata record for this data set was provided to the NOAA Office for Coastal Management (OCM). This record was created with information from the data report. A link to the data report is provided in the URL section of this metadata record.

This bare earth digital elevation model (DEM) represents the earth's surface with all vegetation and human-made structures removed in the OLC Siskiyou project area. Bare earth DEMs were derived from LiDAR data using TIN processing of the ground point returns. The DEM grid cell size is 3 feet.

The dataset encompasses 132,009 acres in portions of Jackson County in the state of Oregon. The bare earth digital elevation model (DEM) represents the earth's surface with all vegetation and human-made structures removed. Some elevation values have been interpolated across areas in the models where there is no elevation data (e.g. over water, over dense vegetation). Quantum Spatial, Inc. collected the lidar and created this data set for the Oregon Lidar Consortium (OLC).

In addition to these bare earth Digital Elevation Model (DEM) data, the lidar point data that these DEM data were created from are also available. These data are available for download at the link provided in the URL section of this metadata record.

This dataset provides high resolution terrain elevation and land cover elevation data in the OLC Siskiyou project area.

This dataset was contracted by the Oregon Lidar Consortium (OLC). Information regarding the use of this data set should be directed to the owner.

Any conclusions drawn from the analysis of this information are not the responsibility of OLC, NOAA, the Office for Coastal Management or its partners.

Data is available online for bulk and custom downloads.

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Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations.

Vertical accuracy reporting is designed to meet guidelines presented in the National Standard for Spatial Data Accuracy (NSSDA) (FGDC,1998) and the ASPRS Positional Accuracy Standards for Digital Geospatial Data v1.0 (ASPRS, 2014). The statistical model compares known reserved ground survey points (GSPs) to the ground model, triangulated from the neighboring laser points. Vertical accuracy statistical analysis uses reserved ground survey points in open areas where the LiDAR system has a "very high probability" that the sensor will measure the ground surface and is evaluated at the 95th percentile.

For the OLC Siskiyou study area, a total of 845 ground control points were collected and used for calibration of the LiDAR data. An additional 45 ground survey points were collected and reserved for independent verification, resulting in a non-vegetated vertical accuracy (NVA) of 0.058 meters, or 0.190 feet.

Data is backed up to tape and to cloud storage.

Quantum Spatial, Inc. has collected Light Detection and Ranging (LIDAR) data in the Siskiyou Study Area for the Oregon Lidar Consortium (OLC).

NOAA OCM has taken the data and ingested it into the Digital Coast Data Access Viewer for distribution.