Results 31 to 40 of about 51,029,080 (298)

Vertical accuracy assessment of open access digital elevation models: Bucaramanga-Colombia case study

open access: yesGeodesy and Cartography, 2022
Digital Elevation Models (DEMs), are fundamental data that allow to represent topographic information continuously. They are widely used in various applications such as geoscience, and in the graphical representation of the landscape surface ...
Jhonathan Aponte Saravia
doaj   +1 more source

The Creation of Space Vector Models of Buildings From RPAS Photogrammetry Data

open access: yesSlovak Journal of Civil Engineering, 2017
The results of Remote Piloted Aircraft System (RPAS) photogrammetry are digital surface models and orthophotos. The main problem of the digital surface models obtained is that buildings are not perpendicular and the shape of roofs is deformed.
Trhan Ondrej
doaj   +1 more source

Simplification algorithms of selection parameters of LIDAR ground surface points cloud

open access: yesGeodesy and Cartography, 2012
The paper treats experiment of LIDAR points filtering. The goal of filtering is to remove redundancy points for map sheets printing and designing tasks. General aim is the precision of filtering data for designing tasks.
Žilvinas Stankevičius   +1 more
doaj   +1 more source

Improving Intertidal Reef Mapping Using UAV Surface, Red Edge, and Near-Infrared Data

open access: yesDrones, 2019
Coastal living reefs provide considerable services from tropical to temperate systems. Threatened by global ocean-climate and local anthropogenic changes, reefs require spatially explicit management at the submeter scale, where socioecological processes ...
Antoine Collin   +3 more
doaj   +1 more source

Application of RUSLE model for estimating soil erosion in Gaza strip in Palestine using geographic information system [PDF]

open access: yesمجلة جامعة النجاح للأبحاث العلوم الطبيعية, 2020
The study aimed to calculate the amount of soil erosion in Gaza Strip and identify areas of most exposed to soil erosion risk to take appropriate measures.
Basim Almughari
doaj   +1 more source

An Information Model for Surface Metrology [PDF]

open access: yes, 2013
According to ISO standards, the specification and verification of surface texture includes an ordered set of operations. In order to reduce the specification uncertainty, it is of importance to model the significant information related to surface ...
Li, Tukun   +3 more
core   +1 more source

Sugarcane canopy detection using high spatial resolution UAS images and digital surface model

open access: yesEngineering and Applied Science Research, 2019
The use of an unmanned aerial system (UAS) equipped with multispectral cameras is a potential approach to acquire canopy reflectance to make various correlations with desired crop parameters. However, the acquired reflectance data are mixed with unwanted
Chanreaksa Chea   +4 more
doaj   +1 more source

INTEGRATION OF HETEROGENOUS DIGITAL SURFACE MODELS

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
Abstract. The application of extended digital surface models often reveals, that despite an acceptable global accuracy for a given dataset, the local accuracy of the model can vary in a wide range. For high resolution applications which cover the spatial extent of a whole country, this can be a major drawback.
Boesch, R., Ginzler, C.
openaire   +4 more sources

Development of a digital surface model and a digital terrain model based on ERS data

open access: yesIOP Conference Series: Materials Science and Engineering, 2020
Abstract The paper considers the development methods of a digital surface model and a digital terrain model of the Dead City territory. The work utilizes the Phantom 4 PRO UAV with high flight stability and excellent shooting quality (camera 20Mg/px) with 4K resolution that allows creating qualitative DSM, DTM with a possibility of ...
I G Gairabekov   +5 more
openaire   +1 more source

Spatially Regularized Fusion of Multiresolution Digital Surface Models [PDF]

open access: yesIEEE Transactions on Geoscience and Remote Sensing, 2017
In this paper, we propose an algorithm for robustly fusing digital surface models (DSMs) with different ground sampling distances and confidences, using explicit surface priors to obtain locally smooth surface models. Robust fusion of the DSMs is achieved by minimizing the L1-distance of each pixel of the solution to each input DSM.
Kuschk, Georg   +4 more
openaire   +4 more sources

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