Results 61 to 70 of about 55,303,286 (181)

Spatial scale analysis of landscape processes for digital soil mapping in Ireland [PDF]

open access: yes, 2013
Soil is one of the most precious resources on Earth because of its role in storing and recycling water and nutrients essential for life, providing a variety of ecosystem services.
Cavazzi, Stefano
core   +5 more sources

Accuracy Assessment of Digital Surface Models Based on WorldView-2 and ADS80 Stereo Remote Sensing Data

open access: yesSensors, 2012
Digital surface models (DSMs) are widely used in forest science to model the forest canopy. Stereo pairs of very high resolution satellite and digital aerial images are relatively new and their absolute accuracy for DSM generation is largely unknown. For
Christian Ginzler, Martina L. Hobi
doaj   +1 more source

AUTOMATIC BUILDING EXTRACTION AND ROOF RECONSTRUCTION IN 3K IMAGERY BASED ON LINE SEGMENTS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
We propose an image processing workflow to extract rectangular building footprints using georeferenced stereo-imagery and a derivative digital surface model (DSM) product.
A. Köhn, J. Tian, F. Kurz
doaj   +1 more source

Creating high-resolution bare-earth digital elevation models (DEMs) from stereo imagery in an area of densely vegetated deciduous forest using combinations of procedures designed for lidar point cloud filtering

open access: yesGIScience & Remote Sensing, 2017
For areas of the world that do not have access to lidar, fine-scale digital elevation models (DEMs) can be photogrammetrically created using globally available high-spatial resolution stereo satellite imagery.
Jessica D. DeWitt   +3 more
doaj   +1 more source

Evaluation of selected methods for extracting digital terrain models from satellite born digital surface models in urban areas [PDF]

open access: yes, 2011
For the generation of 3D city models from satellite stereo imagery beyond the generation of digital surface models (DSM) from stereo data the next crucial step is the separation of urban 3D objects from ground.
Arefi, Hossein   +2 more
core  

Automated DSM based Georeferencing of CARTOSAT-1 Stereo Scenes [PDF]

open access: yes, 2009
High resolution stereo satellite imagery is well suited for the creation of digital surface models (DSM). A system for highly automated and operational DSM and orthoimage generation based on CARTOSAT-1 imagery is presented, with emphasis on fully ...
Reinartz, Peter   +4 more
core  

Numerical Investigation of Terrain-Induced Turbulence in Complex Terrain Using High-Resolution Elevation Data and Surface Roughness Data Constructed with a Drone

open access: yesEnergies, 2019
Using the method based on unmanned aerial vehicle (UAV) imagery, two kinds of data can be obtained: the digital elevation model (DEM) for the digital expression of terrain, and the digital surface model (DSM) for the digital expression of the surface of ...
Takanori Uchida
doaj   +1 more source

DSM Generation from Multi-View High-Resolution Satellite Images Based on the Photometric Mesh Refinement Method

open access: yesRemote Sensing, 2022
Automatic reconstruction of DSMs from satellite images is a hot issue in the field of photogrammetry. Nowadays, most state-of-the-art pipelines produce 2.5D products.
Benchao Lv   +3 more
doaj   +1 more source

Evaluation of Digital Surface Model (DSM) constructed using digital photogrammetry for mapping applications / Associate Prof. Dr Jasmee Jaafar [PDF]

open access: yes, 2004
Pembangunan pesat dalam bidang fotogrametri telah membuka era baru dalam pemerosesan berbentuk digital. Diantara produk teknologi fotogrametri digital yang dihasilkan dalam masa yang singkat adaiah Digital Surface Model (DSM).
Jaafar, Jasmee (Associate Prof. Dr)
core  

Validation of digital surface models (DSMs) retrieved from unmanned aerial vehicle (UAV) point clouds using geometrical information from shadows

open access: yesAutonomous Air and Ground Sensing Systems for Agricultural Optimization and Phenotyping IV, 2019
Theoretically, the appearance of shadows in aerial imagery is not desirable for researchers because it leads to errors in object classification and bias in the calculation of indices. In contrast, shadows contain useful geometrical information about the objects blocking the light.
Aboutalebi, Mahyar   +5 more
openaire   +4 more sources

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