Results 21 to 30 of about 207,214 (277)

Fast approximation of visibility dominance using topographic features as targets and the associated uncertainty [PDF]

open access: yes, 2003
An approach to reduce visibility index computation time andmeasure the associated uncertainty in terrain visibility analysesis presented. It is demonstrated that the visibility indexcomputation time in mountainous terrain can be reduced substantially ...
Rana, S
core   +1 more source

Evaluation of a hydrographic technique to measure on-farm water storage volumes [PDF]

open access: yes, 2005
Digital terrain models of on-farm water storages are required to assist in accurately measuring the on-farm water balance and water use efficiency components including storage capacity, inflow, seepage, evaporation and discharge volumes.
Clark   +10 more
core   +1 more source

Sparsity-Driven Digital Terrain Model Extraction [PDF]

open access: yesIGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018
Preprint. Paper published in IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, Valencia, 2018, pp.
Nar, Fatih   +2 more
openaire   +4 more sources

Probability maps as a measure of reliability for indivisibility analysis [PDF]

open access: yesSpatium, 2005
Digital terrain models (DTMs) represent segments of spatial data bases related to presentation of terrain features and landforms. Square grid elevation models (DEMs) have emerged as the most widely used structure during the past decade because of their ...
Joksić Dušan, Bajat Branislav
doaj   +1 more source

Terrain Sculptor: generalizing terrain models for relief shading [PDF]

open access: yes, 2010
Shaded relief derived from high-resolution terrain models often contains distracting terrain details that need to be removed for medium- and small- scale mapping. When standard raster filter operations are applied to digital terrain data, important ridge
Hurni, L, Jenny, B, Leonowicz, A M
core   +1 more source

MODELING OF THE "PLAN DA MATTUN" ARCHAEOLOGICAL SITE USING A COMBINATION OF DIFFERENT SENSORS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
Plan da Mattun is located at ~2200 metre above sea level in the Tasna valley in alpine south-eastern Switzerland. In this remote location, finds dating back to the time of Ötzi (3000 B.C.) were discovered by archaeologists from the University of Zurich.
D. Novák, P. Tokarczyk, P. W. Theiler
doaj   +1 more source

Documentation of landslides and inaccessible parts of a mine using an unmanned uav system and methods of digital terrestrial photogrammetry [PDF]

open access: yes, 2015
Quite a big boom has recently been experienced in the technology of unmanned aerial vehicles (UAV). In conjunction with dense matching system, it gives one a powerful tool for the creation of digital terrain models and orthophotomaps.
Jiránková, Eva   +3 more
core   +1 more source

DETERMINING THE SUITABILITY OF DIFFERENT DIGITAL ELEVATION MODELS AND SATELLITE IMAGES FOR FANCY MAPS. AN EXAMPLE OF CYPRUS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
The article describes the possibility of developing an overall map of the selected area on the basis of publicly available data. Such a map would take the form designed by the author with the colors that meets his expectations and a content, which he ...
J. Drachal, A. K. Kawel
doaj   +1 more source

Method for Measuring the Information Content of Terrain from Digital Elevation Models

open access: yesEntropy, 2015
As digital terrain models are indispensable for visualizing and modeling geographic processes, terrain information content is useful for terrain generalization and representation.
Lujin Hu   +3 more
doaj   +1 more source

FOSS4G date assessment on the isprs optical stereo satellite data. A benchmark for DSM generation [PDF]

open access: yes, 2017
The ISPRS Working Group 4 Commission I on "Geometric and Radiometric Modelling of Optical Spaceborne Sensors", provides a benchmark dataset with several stereo data sets from space borne stereo sensors.
Crespi, Mattia   +2 more
core   +1 more source

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