ENPLAN has over 700 square miles of high definition LiDAR digital elevation model (DEM) data in stock. The data was collected via aircraft for our firm by a nationally recognized aerial mapping company. Growing areas of Shasta, Tehama and Siskiyou counties are covered. Delivery lead time is generally two to three business days.
Coverage Maps
Deliverables
- Bare-earth DEM
- TIN models
- Contour lines
- Canopy and hardscape models
- Shaded relief surface visualizations
Applications
- Planning and engineering
- Environmental constraints analysis
- Buildable area delineations
- Tree surveys
- Profiles and sections
- Slope classifications
- Line-of-sight determinations
- Shaded relief maps
- 3-D perspectives
- HEC-RAS stream channel geometry
- Watershed and basin delineation
Our LiDAR
Our LiDAR collections are designed to obtain elevations at one-meter horizontal postings and provide vertical accuracies of ±6 inches at 1 Sigma on flat exposed ground. Precision ground survey checks of our bare earth digital elevation model (DEM) data that have been conducted independently for ENPLAN show this vertical accuracy objective to have been met consistently on such surfaces. As with photogrammetry, accuracies vary where laser pulses do not consistently reach the ground due to the presence of obscuring features such as vegetation. Overall, the dense and diverse mass-point cloud created by LiDAR yields a DEM with excellent fidelity and broader utility when compared with DEMs produced via photogrammetry.
Elevation datasets available from ENPLAN include bare earth and canopy or hardscape digital elevation models. Our canopy and hardscape DEMs define vegetation, buildings, and other surface features rising above bare earth. Return intensity files are also available and can be used to produce imagery that differentiates surface textures. Digital, site-specific datasets can be extracted and conveyed very quickly to users. Our LiDAR coverage presently includes over 700 square miles.
LiDAR Explained
Airborne Light Detection and Ranging (LiDAR) technology involves a powerful laser, sensor, precision airborne global positioning system (GPS), an inertial measurement unit (IMU) and specialized software. The laser and sensor operate through a portal on the underside of an aircraft. Laser pulses are emitted very rapidly (100,000+ per second) and the sensor measures both the timing and intensity of returns from strike points on the terrain or other features below. The result is a point cloud from which the primary raw elevation data is extracted. See the links below for more details.
LiDAR-Wikipedia
LiDAR-NOAA
DEM-Wikipedia
