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• Geomorphic Processes and the Differences of Scale

• Lidar Data Use: Examples from the Upper Neuse River

• Simulated Water Erosion Model (SIMWE)

• Land Use History of Piedmont North Carolina

• NCSU Aquatic Animal Species Epidemiology and Conservation Genomics Laboratory Population and Pathobiology

• Freshwater Mussels

The use of Light Detection and Range (Lidar) Technology and data is rapidly becoming a staple in GIS processing. Many of the physical science disciplines are using lidar data to generate high resolution digital elevation models (DEM) that in turn may serve as the basis for GIS applications, e.g., modeling erosion and deposition on hillslopes and in streams. The increasing use and easy access to lidar data suggests the need for better understanding of its potential and limitations, as well as documented methodologies of its use. The following images and links are the partial results of a study to assess the use and accuracy of lidar data.

Evaluation includes comparison between DEMs produced by The North Carolina Flood Mapping Program (NCFM) and DEMs generated using GRASS-based functions (RST) for interpolation. Both DEM sets are based on Lidar bare earth points. Stream extraction and flow accumulation maps are products of GRASS-based functions performed on DEM sets.

McGowan Creek, Eno R.,Orange County DEMs

RST 20-foot NCFM 20-foot

RST 50-foot NCFM 50-foot

Comparisons / RST and NCFM DEMs

Comparisons / RST and NCFM Stream Extraction