Combination of Lidar, Digital Photogrammetry and Terrestrial Survey to Generate High-quality Dems
نویسندگان
چکیده
The paper describes the work-flow that has been developed at the State Surveying & Mapping Agency of Bavaria which consists of a combination of LIDAR (in Europe laser scanning“) data collection and additional photogrammetric and terrestrial measurements for checking and complementing the mass data derived from LIDAR. This workflow is based upon procedures and recommendations for LIDAR-projects put together by a German user group that consisted of members of several German State Mapping Agencies (SMA’s). Finally some experiences and practical results are presented.
منابع مشابه
LiDAR-Derived High Quality Ground Control Information and DEM for Image Orthorectification
Orthophotos (or orthoimages if in digital form) have long been recognised as a supplement or alternative to standard maps. The increasing applications of orthoimages require efforts to ensure the accuracy of produced orthoimages. As digital photogrammetry technology has reached a stage of relative maturity and stability, the availability of high quality ground control points (GCPs) and digital ...
متن کاملAccuracy Assessment of Lidar-derived Digital Elevation Models
Despite the relatively high cost of airborne lidar-derived digital elevation models (DEMs), such products are usually presented without a satisfactory associated estimate of accuracy. For the most part, DEM accuracy estimates are typically provided by comparing lidar heights against a finite sample of check point coordinates from an independent source of higher accuracy, supposing a normal dist...
متن کاملA field investigation of application of digital terrestrial photogrammetry to characterize geometric properties of discontinuities in open-pit slopes
In order to analyze the slope stability in open-pit mines, the structural parameters of rock mass such as persistence and spatial orientation of discontinuities are characterized through field surveys, which involve spending high costs and times as well as posing high risks of rock toppling and rock fall. In the present work, a new application of terrestrial digital photogrammetry is introduced...
متن کاملEffects of DEM source and resolution on WEPP hydrologic and erosion simulation: A case study of two forest watersheds in northern Idaho
The recent modification of the Water Erosion Prediction Project (WEPP) model has improved its applicability to hydrology and erosion modeling in forest watersheds. To generate reliable topographic and hydrologic inputs for the WEPP model, carefully selecting digital elevation models (DEMs) with appropriate resolution and accuracy is essential because topography is a major factor controlling wat...
متن کاملEffects of Topographic Variability and Lidar Sampling Density on Several DEM Interpolation Methods
This study aims to quantify the effects of topographic variability (measured by coefficient variation of elevation, CV) and lidar (Light Detection and Ranging) sampling density on the DEM (Digital Elevation Model) accuracy derived from several interpolation methods at different spatial resolutions. Interpolation methods include natural neighbor (NN), inverse distance weighted (IDW), triangulate...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2002