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ISPRS International Journal of Geo-Information, Volume 7, Issue 6

June 2018 - 35 articles

Cover Story: In the last years, new approaches aimed to increase the automation level of the positional accuracy assessment processes of spatial data have been developed. However, in such cases, an aspect as significant as the sample size has not been addressed. In our work, we study the influence of the sample size when estimating the planimetric positional accuracy of urban databases by means of an automatic assessment polygon-based methodology. Our research is based on a simulation process which extracts pairs of homologous polygons from the assessed data source and from the reference data source and applies two buffer-based methods. Our results show a significant reduction in the variability of the estimations when the sample size increased from 5 Km to 100 Km. View Paper here.
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Articles (35)

  • Article
  • Open Access
27 Citations
5,662 Views
22 Pages

Advanced Sidereal Filtering for Mitigating Multipath Effects in GNSS Short Baseline Positioning

  • Minghua Wang,
  • Jiexian Wang,
  • Danan Dong,
  • Wen Chen,
  • Haojun Li and
  • Zhiren Wang

Advanced sidereal filtering (ASF) is an observation-domain sidereal filtering that adopts the repeat time of each individual satellite separately rather than the mean repeat time, adopted by the modified sidereal filtering (MSF). To evaluate the perf...

  • Article
  • Open Access
22 Citations
6,254 Views
18 Pages

Raw remotely sensed images contain geometric distortions and cannot be used directly for map-based applications, accurate locational information extraction or geospatial data integration. A geometric correction process must be conducted to minimize t...

  • Article
  • Open Access
13 Citations
4,806 Views
18 Pages

Spatial inequalities in urban public transportation are a major concern in many countries but little of this research has focused specifically on taxi services. The taxi situation has grown more complex, as traditional ride-for-hire services face gro...

  • Article
  • Open Access
19 Citations
4,349 Views
16 Pages

Spatial Variability of Local Rural Landscape Change under Rapid Urbanization in Eastern China

  • He Xiao,
  • Yunhui Liu,
  • Liangtao Li,
  • Zhenrong Yu and
  • Xiaotong Zhang

Understanding the characteristics of rural landscape change during the urbanization process is crucial to developing more elaborate rural landscape management plans for sustainable development. However, there is little information revealing how rural...

  • Article
  • Open Access
28 Citations
5,384 Views
21 Pages

In recent years, location-based services have been receiving increasing attention because of their great development prospects. Researchers from all over the world have proposed many solutions for indoor positioning over the past several years. Howev...

  • Article
  • Open Access
28 Citations
5,668 Views
10 Pages

Analysis of Thematic Similarity Using Confusion Matrices

  • José L. García-Balboa,
  • María V. Alba-Fernández,
  • Francisco J. Ariza-López and
  • José Rodríguez-Avi

The confusion matrix is the standard way to report on the thematic accuracy of geographic data (spatial databases, topographic maps, thematic maps, classified images, remote sensing products, etc.). Two widely adopted indices for the assessment of th...

  • Article
  • Open Access
13 Citations
4,965 Views
18 Pages

Research on a 3D Geological Disaster Monitoring Platform Based on REST Service

  • Xiaopeng Leng,
  • Dunlong Liu,
  • Junsong Luo and
  • Zhanyong Mei

Representational state transfer (REST) is a resource-based service architectural style. It abstracts data and services as resources and accesses them through a unique Uniform Resource Identifier (URI). Compared with traditional Simple Object Access P...

  • Article
  • Open Access
11 Citations
6,892 Views
20 Pages

Metaphors are rhetorical devices in linguistics that facilitate the understanding of an unfamiliar concept based on a familiar concept. Map representations are usually referred to as the second language of geo-science studies, and the metaphor method...

  • Article
  • Open Access
7 Citations
5,765 Views
17 Pages

This paper describes a new multi-criteria land evaluation method, based on geomorphology and land cover, for the automated detection of suitable terrain for the sport of foot orienteering (footO). Reference data, in the form of areas already mapped a...

  • Article
  • Open Access
20 Citations
10,284 Views
18 Pages

A Citizen Science Approach for Collecting Toponyms

  • Aji Putra Perdana and
  • Frank O. Ostermann

The emerging trends and technologies of surveying and mapping potentially enable local experts to contribute and share their local geographical knowledge of place names (toponyms). We can see the increasing numbers of toponyms in digital platforms, s...

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