Document Type

Thesis - University Access Only

Award Date


Degree Name

Master of Science (MS)

Department / School



Terrain modeling, the study of ground-surface relief and pattern by numerical methods, has become an integral part to applications in hydrology, tectonics, oceanography, climatology, and geohazard assessment. It is also important to such nongeophysical applications as land use planning, civil engineering, and microwave communications. This study examines DEM models for two square mile areas (sections) of the Sheyenne National Grasslands in North Dakota, and to determine which of three modeling methods (TOPOGRID, TIN or SPLINE) best represents the real terrain elevations. Data were derived from Digital Raster Graphics (DRGs), scanned 1 :24,000 USGS Quadrangle maps. Understanding U.S. National Map Accuracy Standards provides users of map and map-derived products with the information necessary to appropriately evaluate vertical and horizontal accuracy of these data. Statistical tests proved to be inconclusive. The choice of a particular model based on its ability to calculate elevations for this landscape did not seem to matter.

Library of Congress Subject Headings

Digital mapping -- North Dakota -- Sheyenne National Grasslands Sheyenne National Grasslands (N.D.) -- Relief models



Number of Pages



South Dakota State University