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Remote Sens. 2011, 3(6), 1177-1187; doi:10.3390/rs3061177
Article

Development of a New Ground Truth Database for Global Urban Area Mapping from a Gazetteer

1,* , 2
 and 1
Received: 13 April 2011; in revised form: 21 May 2011 / Accepted: 31 May 2011 / Published: 3 June 2011
(This article belongs to the Special Issue Urban Remote Sensing)
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Abstract: We developed a ground truth database for urban areas from the Global Rural-Urban Mapping Project (GRUMP) Settlement Points gazetteer of populated place names by visually interpreting 3,734 urban points on satellite images, thus acquiring 2,144 urban and 1,388 non-urban data points. Our database contained many more urban data points than the existing databases, which had only 0 to 11 ground truth data points. We used our database in combination with the Degree Confluence Project database to assess the accuracy of eight satellite-derived urban area maps, among which the MODIS Terra + Aqua Land Cover Type Yearly L3 Global 500 m SIN Grid was the most accurate (84% overall accuracy; kappa coefficient, 0.63). Moreover, the most recently published maps were not necessarily the most accurate. We compared the accuracy assessment results of our database with those of another database and found that ours detected more errors of commission but included less chance agreement.
Keywords: global urban area mapping; ground truth; gazetteer global urban area mapping; ground truth; gazetteer
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Miyazaki, H.; Iwao, K.; Shibasaki, R. Development of a New Ground Truth Database for Global Urban Area Mapping from a Gazetteer. Remote Sens. 2011, 3, 1177-1187.

AMA Style

Miyazaki H, Iwao K, Shibasaki R. Development of a New Ground Truth Database for Global Urban Area Mapping from a Gazetteer. Remote Sensing. 2011; 3(6):1177-1187.

Chicago/Turabian Style

Miyazaki, Hiroyuki; Iwao, Koki; Shibasaki, Ryosuke. 2011. "Development of a New Ground Truth Database for Global Urban Area Mapping from a Gazetteer." Remote Sens. 3, no. 6: 1177-1187.


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