Extracting Farmland Features from Lidar-Derived DEM for Improving Flood Plain Delineation
نویسندگان
چکیده
منابع مشابه
Impact of Lidar Nominal Post-spacing on DEM Accuracy and Flood Zone Delineation
Lidar data have become a major source of digital terrain information for use in many applications including hydraulic modeling and flood plane mapping. Based on established relationships between sampling intensity and error, nominal post-spacing likely contributes significantly to the error budget. Post-spacing is also a major cost factor during lidar data collection. This research presents met...
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A raster grid with 1m spacing was created using simple kriging from LiDAR point clouds. The 2, 3, 4, 5, 8, and 10 m resolution were created from the original 1 m DEM using nearest neighbor resampling method. The derived DEM were used to study the sensitivity of terrain attributes while changing DEM resolution and possibly introduce a minimum required resolution for the study area. A variety of ...
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The aim of this study is to investigate the capability of integration of LiDAR derived terrain and hydrological features with other salinity related datasets to improve prediction of areas at risk from salinity in a catchment area in Victoria, Australia. Terrain and hydrological features including slope, drainage density and hilltop were generated from LiDAR derived DEM and a relative low quali...
متن کاملThe Effect of Lidar Posting Density on Dem Accuracy and Flood Extent Delineation a Gis-simulation Approach
Recently a number of local communities and a few statewide agencies have undertaken efforts to acquire more accurate digital elevation surfaces for various applications including flood hazard mapping. The technology most widely adopted for this purpose has been LIDAR remote sensing. The acquisition of a spatially dense set of elevation postings representing the " bare " ground may be the greate...
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Obtaining high resolution Digital Elevation Models (DEMs) is a critical task for analysis and visualization in several remote sensing applications. LIDAR technology provides an effective way for obtaining highresolution topographic information. This paper presents a textured-based novel automatic algorithm for DEM generation from LIDAR data. The proposed technique uses multifractal-based textur...
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ژورنال
عنوان ژورنال: Water
سال: 2018
ISSN: 2073-4441
DOI: 10.3390/w10030252