Results 21 to 30 of about 926,063 (298)

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

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

Modeling industrial evolution in geographical space [PDF]

open access: yesJournal of Economic Geography, 2007
In this article we study a class of evolutionary models of industrial agglomeration with local positive feedbacks, which allow for a wide set of empirically testable implications. Their roots rest in the Generalized Polya Urn framework. Here, however, we build on a birth-death process over a finite number of locations and a finite population of firms ...
Giulio Bottazzi   +3 more
openaire   +5 more sources

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

Spatiotemporal Variation of Vegetation Productivity and Its Feedback to Climate Change in Northeast China over the Last 30 Years

open access: yesRemote Sensing, 2021
Gross primary productivity (GPP) represents total vegetation productivity and is crucial in regional or global carbon balance. The Northeast China (NEC), abundant in vegetation resources, has a relatively large vegetation productivity; however, under ...
Ling Hu   +4 more
doaj   +1 more source

Through a glass darkly: a case for the study of virtual space [PDF]

open access: yes, 2002
This paper begins to examine the similarities and differences between virtual space and real space, as taken from anarchitectural (as opposed to a biological, psychological, geographic, philosophical or information theoretic)standpoint.
Bazan, B   +4 more
core   +2 more sources

GEOBIA Achievements and Spatial Opportunities in the Era of Big Earth Observation Data

open access: yesISPRS International Journal of Geo-Information, 2019
The primary goal of collecting Earth observation (EO) imagery is to map, analyze, and contribute to an understanding of the status and dynamics of geographic phenomena.
Stefan Lang   +4 more
doaj   +1 more source

Making Space for Failure in Geographic Research [PDF]

open access: yes, 2017
The idea that field research is an inherently “messy” process has become widely accepted by geographers in recent years. There has thus far been little acknowledgment, however, of the role that failure plays in doing human geography.
Alexis-Martin B.   +18 more
core   +5 more sources

Rediscovering the Geographic Space through the Geographical Space

open access: yesGEOUSP: Espaço e Tempo (Online), 1998
Este artigo pretende discutir a técnica enquanto expressáo das relações entre o Homem e o espaço por ele ocupado, por ele transformado. Buscando nos aproximar de uma visão geográfica das ações do Homem sobre a Natureza, tentam os entender a construção do "presente" e sua configuração nos tempos ...
openaire   +3 more sources

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