ELVIS Digital Elevation Model Imagery Catalog [Draft]

The Digital Elevation Model Imagery Catalog layer describes precision and non-precision elevation datasets acquired from LiDAR and aerial / satellite sensors currently archived in the department. Precision elevation products are defined as Digital Terrain Models (or bare Earth Digital Elevation Models) captured from either LiDAR sources or photogrammetrically derived from aerial photography. Non-precision Digital Surface Models (DSMs) are unedited and do not have an accuracy specification and are created during the aerotriangulation process. Their purpose is to ensure the corresponding imagery meets the required horizontal accuracy specification. LiDAR classified point clouds and derived Digital Terrain Models under a CC-BY license have been uploaded to the ELVIS Elevation and Depth Online Portal.