Paper Info
Title
A Quality Study of the OpenStreetMap Dataset for Tehran.
Abstract
There has been enormous progress in geospatial data acquisition in the last decade. Centralized data collection, mainly by land surveying offices and local government agencies, has changed dramatically to voluntary data provision by citizens. Among a broad list of initiatives dealing with user generated geospatial information, OpenStreetMap (OSM) is one of the most famous crowd-sourced products. It is believed that the quality of collected information remains a valid concern. Therefore, qualitative assessment of OSM data as the most significant instance of volunteered geospatial information (VGI) is a considerable issue in the geospatial information community. One aspect of VGI quality assessment pertains to its comparison with institutionally referenced geospatial databases. This paper proposes a new quality metric for assessment of VGI accuracy and as well as for quality analysis of OSM dataset by evaluating its consistency with that of a reference map produced by Municipality of Tehran, Iran. A gridded map is employed and heuristic metrics such as Minimum Bounding Geometry area and directional distribution (Standard Deviational Ellipse), evaluated for both VGI and referenced data, are separately compared in each grid. Finally, in order to have a specific output as an integrated quality metric for VGI, its consistency with ground-truth data is evaluated using fuzzy logic. The results of this research verify that the quality of OSM maps in the study area is fairly good, although the spatial distribution of uncertainty in VGI varies throughout the dataset.
Year
DOI
Venue
2014
10.3390/ijgi3020750
ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION
Keywords
Field
DocType
VGI,spatial data quality,fuzzy,open street map dataset
Geospatial analysis,Data science,Data collection,Heuristic,Fuzzy logic,Volunteered geographic information,Surveyor,Geography,Grid,Bounding overwatch
Journal
Volume
Issue
ISSN
3
2
2220-9964
Citations 
PageRank 
References 
19
0.86
6
Authors
2
Name
Order
Citations
PageRank
Mohammad Forghani1201.54
Mahmoud Reza Delavar210614.99