Natural Resource Mapping Using Landsat and Lidar towards Identifying Digital Elevation, Digital Surface and Canopy Height Models
نویسندگان
چکیده
منابع مشابه
Mapping Canopy Height and Growing Stock Volume Using Airborne Lidar, ALOS PALSAR and Landsat ETM+
We have investigated for forest plantations in Chile the stand-level retrieval of canopy height (CH) and growing stock volume (GSV) using Airborne Laser Scanner (ALS), ALOS PALSAR and Landsat. In a two-stage up-scaling approach, ensemble regression tree models (randomForest) were used to relate a suite of ALS canopy structure indices to stand-level in situ measurements of CH and GSV for 319 sta...
متن کاملInundation Extent and Flood Frequency Mapping Using LANDSAT Imagery and Digital Elevation Models
We modeled the extent of inundation around Poyang Lake, China using 13 Landsat images and two digital elevation models (DEMs). Boundaries of the observed inundation extents were (a) labeled with lake-level measurements taken at a representative hydrological station and (b) interpolated to create a Water Line DEM (WL-DEM) that was used to map inundation frequency. A 30 m contour-based DEM produc...
متن کاملGenerate Digital Elevation Models Using Laser Altimetry (LIDAR) Data
A Laser Altimetry (LIDAR) system aboard an aircraft can yield highly accurate data about the ground surface and vegetation below. Raw LIDAR points must be processed to generate a digital elevation model (DEM), i.e. a digital map of the terrain surface. A number of techniques can be used to generate the DEM, and in this report I investigate several of these including a new algorithm based on rec...
متن کاملFusion of Lidar and Photogrammetric Generated Digital Elevation Models
The fusion of digital surfaces, their optimal combination into a new single dataset, is a crucial topic in the geomatic sciences. Nowadays, sensors and processing techniques provide for the same site Digital Elevation Models (DEMs) with different geometric characteristics and accuracy. Each DEM contains intrinsic errors due to the primary data acquisition technology and processing methodology s...
متن کاملAnalysis of Viewshed Accuracy with Variable Resolution LIDAR Digital Surface Models and Photogrammetrically- Derived Digital Elevation Models
The analysis of visibility between two points on the earth’s terrain is a common use of GIS software. Most commercial GIS software packages include the ability to generate a viewshed, or a map of terrain surrounding a particular location that would be visible to an observer. Viewsheds are often generated using “bare-earth” Digital Elevation Models (DEMs) derived from the process of photogrammet...
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ژورنال
عنوان ژورنال: International Journal of Environmental Sciences & Natural Resources
سال: 2017
ISSN: 2572-1119
DOI: 10.19080/ijesnr.2017.02.555580