Results 21 to 30 of about 130,088 (262)

Research on cyberspace surveying and mapping technology

open access: yes网络与信息安全学报, 2016
Cyberspace surveying and mapping technology is a network common foundation and application technology.The research progress of cyberspace surveying and mapping technology was reviewed and discussed.Firstly,the con-notation and principle framework of ...
Fan ZHAO,Xiang-yang LUO,Fen-lin LIU
doaj   +3 more sources

Comparing sample bias correction methods for species distribution modeling using virtual species

open access: yesEcosphere, 2021
A key assumption in species distribution modeling (SDM) with presence‐background (PB) methods is that sampling of occurrence localities is unbiased and that any sampling bias is proportional to the background distribution of environmental covariates ...
Richard Inman   +3 more
doaj   +1 more source

Lunar Surface Temperature and Emissivity Retrieval From Diviner Lunar Radiometer Experiment Sensor

open access: yesEarth and Space Science, 2021
The lunar surface temperature (LST) derived from thermal infrared (TIR) measurements can aid in understanding the physical properties of the lunar surface.
Huazhong Ren   +6 more
doaj   +1 more source

GEOGRAPHICAL GRADIENTS - AS A MEASUREMENT OF GEOGRAPHICAL SPACE

open access: yesГеосистемы Северо-Восточной Азии, 2021
Предлагается более широкий круг градиентных измерений географического пространства. В природной сфере – различия в биоразнообразии и ландшафтном разнообразии. В природно-ресурсной сфере – различия в запасах и продуктивности природных ресурсов, имеющих пространственно непрерывное распределение (лесных, земельных), а также – различия в сочетаниях ...
openaire   +1 more source

Evolutions and threats to land management in the peri-urban area of the city of Sidi Bel Abbes (Algeria) - an analysis based on spatial cadastral data

open access: yesGeoadria, 2023
Sidi Bel Abbes, the capital of Mekerra, a city of the interior plain, where agricultural land has experienced urban spillover at the expense of peri-urban land. The accelerated sprawl between 1987 and 2019 is expressed by threats to peri-urban state land,
Djamel Mansour   +4 more
doaj   +1 more source

Heat and Drought Stress Advanced Global Wheat Harvest Timing from 1981–2014

open access: yesRemote Sensing, 2019
Studying wheat phenology can greatly enhance our understanding of how wheat growth responds to climate change, and guide us to reasonably confront its influence. However, comprehensive global-scale wheat phenology–climate analysis is still lacking.
Shilong Ren   +4 more
doaj   +1 more source

Vector Angular Continuity in the Fusion of Coseismic Deformations at Multiple Optical Correlation Scales

open access: yesSensors, 2023
As one of the common techniques for measuring coseismic deformations, optical image correlation techniques are capable of overcoming the drawbacks of inadequate coherence and phase blurring which can occur in radar interferometry, as well as the problem ...
Rui Guo, Qiming Zeng, Shangzong Lu
doaj   +1 more source

Semantični splet in koncept globalne geo-ontologije ( = Semantic web and the concept of global geo-ontology) [PDF]

open access: yesGeodetski Vestnik, 2013
Geographic information systems have been applied on the World Wide Web with different approaches and there is a need to recognize how different groups of users conceptualize the domain of geographic space.
Marjan Čeh   +2 more
doaj   +2 more sources

Quality Assessment of TanDEM-X DEMs, SRTM and ASTER GDEM on Selected Chinese Sites

open access: yesRemote Sensing, 2021
Digital elevation models (DEMs) are the basic data of science and engineering technology research. SRTM and ASTER GDEM are currently widely used global DEMs, and TanDEM-X DEM, released in 2016, has attracted users’ attention due to its unprecedented ...
Haijiao Han, Qiming Zeng, Jian Jiao
doaj   +1 more source

An Adaptive Decomposition Approach with Dipole Aggregation Model for Polarimetric SAR Data

open access: yesRemote Sensing, 2021
Polarimetric synthetic aperture radar (PolSAR) has attracted lots of attention from remote sensing scientists because of its various advantages, e.g., all-weather, all-time, penetrating capability, and multi-polarimetry.
Zezhong Wang, Qiming Zeng, Jian Jiao
doaj   +1 more source

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