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ISPRS International Journal of Geo-Information, Volume 10, Issue 3

March 2021 - 89 articles

Cover Story: The ubiquity of the Internet enabled the establishment of well-recognised online projects and knowledge bases. Online communities evolve around these projects that enhance and maintain their content, but these communities and their members are often ignored during the usage or analysis of the projects’ data. The systematic framework established in this publication enables a comparable analysis of online community members. Four contextual dimensions of effect on community members are identified: engagement and skill, physical location, digital location, community involvement and personal attributes. They influence many aspects of the data produced by community members. The framework is applied to the use case of OpenStreetMap mappers to assess the impact of community events on them and how these events influence the knowledge they produce. View this paper
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Articles (89)

  • Article
  • Open Access
32 Citations
8,367 Views
11 Pages

Multitemporal Analysis of Land Use and Land Cover within an Oil Block in the Ecuadorian Amazon

  • Sergio Llerena-Montoya,
  • Andrés Velastegui-Montoya,
  • Bryan Zhirzhan-Azanza,
  • Viviana Herrera-Matamoros,
  • Marcos Adami,
  • Aline de Lima,
  • Francisco Moscoso-Silva and
  • Luis Encalada

The Ecuadorian Amazon is considered a biodiverse region, and at the same time contains the largest number of oil blocks and oilfields in the country. Oil exploitation requires the implementation of oil facilities and related infrastructure, such as r...

  • Article
  • Open Access
22 Citations
4,657 Views
29 Pages

Evapotranspiration is the major component of the water cycle, so a correct estimate of this variable is fundamental. The purpose of the present research is to assess the monthly scale accuracy of six meteorological data-based models in the prediction...

  • Article
  • Open Access
10 Citations
3,290 Views
21 Pages

The Three-River Source Region (TRSR) is vital to the ecological security of China. However, the impact of global warming on the dynamics of vegetation along the elevation gradient in the TRSR remains unclear. Accordingly, we used multi-source remote...

  • Article
  • Open Access
27 Citations
4,571 Views
21 Pages

A Precision Evaluation Index System for Remote Sensing Data Sampling Based on Hexagonal Discrete Grids

  • Yue Ma,
  • Guoqing Li,
  • Xiaochuang Yao,
  • Qianqian Cao,
  • Long Zhao,
  • Shuang Wang and
  • Lianchong Zhang

With the rapid development of earth observation, satellite navigation, mobile communication, and other technologies, the order of magnitude of the spatial data we acquire and accumulate is increasing, and higher requirements are put forward for the a...

  • Article
  • Open Access
4 Citations
5,804 Views
41 Pages

Over the last decade, innovative computer technologies and the multiplication of geospatial data acquisition solutions have transformed the geographic information systems (GIS) landscape and opened up new opportunities to close the gap between GIS an...

  • Article
  • Open Access
43 Citations
6,171 Views
17 Pages

The Influence of Spatial Grid Division on the Layout Analysis of Urban Functional Areas

  • Shaohua Luo,
  • Yang Liu,
  • Mingyi Du,
  • Siyan Gao,
  • Pengfei Wang and
  • Xiaoyu Liu

The identification of urban functional areas is essential for urban planning and sustainable development. Spatial grids are the basic units for the implementation of urban plans and management by cities or development zones. The emergence of internet...

  • Article
  • Open Access
4 Citations
4,734 Views
22 Pages

Current spatiotemporal data has facilitated movement studies to shift objectives from descriptive models to explanations of the underlying causes of movement. From both a practical and theoretical standpoint, progress in developing approaches for the...

  • Article
  • Open Access
18 Citations
7,670 Views
26 Pages

Determining the flow accumulation threshold (FAT) is a key task in the extraction of river networks from digital elevation models (DEMs). Several methods have been developed to extract river networks from Digital Elevation Models. However, few studie...

  • Article
  • Open Access
58 Citations
7,952 Views
23 Pages

3D scene classification has become an important research field in photogrammetry, remote sensing, computer vision and robotics with the widespread usage of 3D point clouds. Point cloud classification, called semantic labeling, semantic segmentation,...

  • Article
  • Open Access
4 Citations
7,310 Views
24 Pages

The General Allotment Act of 1887, also known as the Dawes Act, established the legal basis for the United States government to break up remaining tribally-owned reservation lands in the U.S. by allotting individual parcels to tribal members and sell...

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ISPRS Int. J. Geo-Inf. - ISSN 2220-9964