LIDAR has been collected for Eastern Nebraska. The project was funded by the Nebraska USDA-NRCS to obtain high-resolution digital elevation data developed from 1.4m GSD minimum resolution LIDAR for the entire study area. The study area includes parts of the following counties: Butler, Cass, Howard, Johnson, Merrick, Nance, Nemaha, Otoe, Platte, Polk, and Saunders. Please see the Index below for exact locations..

Vertical accuracy was specified to meet a standard of RMSE=18.5cm (Accuracyz=0.36m at 95% confidence level). Horizontal accuracy was specified to meet or exceed 0.6m RMSE (Accuracy=1.04m at the 95% confidence level). Points were to be classified in the following classes: Points were to be classified in the following classes:

Class 1- Unclassified
Class 2- Ground
Class 7- Low point and noise
It was collected in leaf-off conditions between Fall of 2010 and Spring of 2011.

The USDA-NRCS obtained and shared with Nebraska DNR LAS files, 1m DEMs, and 2 foot contours for this project. The NRCS DEMS were edge-matched to existing LIDAR, including data obtained by the Nebraska Iowa Regional Orthophotography Consortium (NIROC) in 2010 and data from the Prairie Creek project, funded by the Central Platte Natural Resource District (CPNRD) also flown in 2010. For more information on the NIROC and CPNRD Prairie Creek LIDAR date sets, see the below listed contacts. The Index provided below shows the areas covered by the NRCS and NIROC LIDAR data. DNR produced 2m DEMs from the NRCS 1m DEMs for the NRCS and NIROC LIDAR data by resampling the NRCS 1m DEMs through ArcGIS Spatial Analyst using the bilinear interpolation technique. This technique was chosen because it is the preferred technique for continuous surfaces, such as elevation data. The 2m DEMs are available below for download.