Results 31 to 40 of about 16,959 (229)

Accuracy of UAV Photogrammetry in Glacial and Periglacial Alpine Terrain: A Comparison With Airborne and Terrestrial Datasets

open access: yesFrontiers in Remote Sensing, 2022
Unoccupied Aerial Vehicles (UAVs) equipped with optical instruments are increasingly deployed in high mountain environments to investigate and monitor glacial and periglacial processes.
Alexander R. Groos   +7 more
doaj   +1 more source

Assessment of tree layer biomass and structure using aerial photos in lake catchments of the Šumava Mts.

open access: yesJournal of Forest Science, 2009
The combination of georeferenced colour aerial photos and limited field measurements of individual trees was used to determine tree stand biomass in forests of prevailing Norway spruce.
K. Matějka
doaj   +1 more source

An Improved Res-UNet Model for Tree Species Classification Using Airborne High-Resolution Images

open access: yesRemote Sensing, 2020
Tree species classification is important for the management and sustainable development of forest resources. Traditional object-oriented tree species classification methods, such as support vector machines, require manual feature selection and generally ...
Kaili Cao, Xiaoli Zhang
doaj   +1 more source

Delineation of vacant building land using orthophoto and lidar data object classification [PDF]

open access: yesGeodetski Vestnik, 2019
Exact data about the location and area of vacant building land have been a major issue in several Slovene municipalities. This article deals with automatic vacant building land delineation.
Dejan Jenko   +3 more
doaj   +1 more source

Copernicus's Heliograph at Olsztyn -- the 500th Anniversary of a Scientific Milestone

open access: yes, 2017
Exactly 500 years ago, Nicolaus Copernicus drew a lattice of lines on a panel above the doorway to his rooms at Olsztyn Castle, then in the Bishopric of Warmia.
Fischer, Gordon, Graßhoff, Gerd
core   +1 more source

Object-Based Land-Cover Mapping with High Resolution Aerial Photography at a County Scale in Midwestern USA

open access: yesRemote Sensing, 2014
There are growing demands for detailed and accurate land cover maps in land system research and planning. Macro-scale land cover maps normally cannot satisfy the studies that require detailed land cover maps at micro scales.
Xiaoxiao Li, Guofan Shao
doaj   +1 more source

Creating of digital surface model and orthophoto from ASTER satellite data and their application in land/water research

open access: yesSoil and Water Research, 2008
Satellite data has become a commonly used information source. Landscapes components such as water, inorganic substances, vegetation, and the atmosphere may be distinguished making use of their spectral characteristics.
Dana Tollingerová, Karel Pavelka
doaj   +1 more source

Applying UAV-Based Remote Sensing Observation Products in High Arctic Catchments in SW Spitsbergen

open access: yesRemote Sensing, 2023
In the age of remote sensing, particularly with new generation Uncrewed Aerial Vehicles (UAVs), there is a broad spectrum of applications, especially in remote and rapidly changing areas such as the Arctic.
Abhishek Bamby Alphonse   +3 more
doaj   +1 more source

Methodology for the metric restoration of the historical cartography applied to Francisco Coello's cartografic series of the Royal Site of Aranjuez [PDF]

open access: yes, 2011
Hojas Kilométricas (Kilometric Sheets). Specifically, the study focuses on those sheets referring to the city centre and surrounding area of the Royal Site of Aranjuez, a town in the south of the Province of Madrid.
Asenjo Villar, Juan Carlos   +2 more
core   +1 more source

Geomatic methods applied to the change study of the la Paúl Rock Glacier, Spanish Pyrenees [PDF]

open access: yes, 2019
Producción CientíficaRock glaciers are one of the most important features of the mountain permafrost in the Pyrenees. La Paúl is an active rock glacier located in the north face of the Posets massif in the La Paúl glacier cirque (Spanish Pyrenees).
Gómez Lende, Manuel   +5 more
core   +2 more sources

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