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Investigation of differences of topographical map and GIS-derived spatial map with actual ground data in Peninsular Malaysia.

In a geographical information system (GIS), digital maps usually used to show multiple views of geographical objects either through two-dimensional or three-dimensional, which topographical parameters are digitally generated. Digital maps are often used in extensively environmental application witho...

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Main Authors: Ismail, Mohd Hasmadi, J. C, Taylor
Format: Article
Language:English
English
Published: Canadian Center of Science and Education 2009
Online Access:http://psasir.upm.edu.my/id/eprint/15300/1/Investigation%20of%20differences%20of%20topographical%20map%20and%20GIS.pdf
http://psasir.upm.edu.my/id/eprint/15300/
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spelling my.upm.eprints.153002015-09-29T08:00:19Z http://psasir.upm.edu.my/id/eprint/15300/ Investigation of differences of topographical map and GIS-derived spatial map with actual ground data in Peninsular Malaysia. Ismail, Mohd Hasmadi J. C, Taylor In a geographical information system (GIS), digital maps usually used to show multiple views of geographical objects either through two-dimensional or three-dimensional, which topographical parameters are digitally generated. Digital maps are often used in extensively environmental application without quantifying the effect of their errors. This study was carried out to investigate the difference of elevation and slope of topographical map and GIS-derived spatial map with actual ground data. The analyses of differences were quantified from interpolation process, sampling and measurement in the field. The RMSE of the DEM creation for the test site was 0.62. The result was based on the 10 m DEM resolutions and 20 m contour interval. From the analysis of differences (elevation and slope) of topographical map and actual ground data, it’s showed that the difference is only about 2 % and 28%, respectively. The great differences on slope may be due to error during data collection by different enumerators and also inconsistent reading of slope measurement and target. Despite the difficulty occurs during ground data collection, estimation method was applied and this relatively simple procedure but appears acceptable in regard to sufficient data sets at nominal map scale 1:50000. Canadian Center of Science and Education 2009 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/15300/1/Investigation%20of%20differences%20of%20topographical%20map%20and%20GIS.pdf Ismail, Mohd Hasmadi and J. C, Taylor (2009) Investigation of differences of topographical map and GIS-derived spatial map with actual ground data in Peninsular Malaysia. Modern Applied Science, 3 (1). pp. 81-88. ISSN 1913-1852 http://www.ccsenet.org English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description In a geographical information system (GIS), digital maps usually used to show multiple views of geographical objects either through two-dimensional or three-dimensional, which topographical parameters are digitally generated. Digital maps are often used in extensively environmental application without quantifying the effect of their errors. This study was carried out to investigate the difference of elevation and slope of topographical map and GIS-derived spatial map with actual ground data. The analyses of differences were quantified from interpolation process, sampling and measurement in the field. The RMSE of the DEM creation for the test site was 0.62. The result was based on the 10 m DEM resolutions and 20 m contour interval. From the analysis of differences (elevation and slope) of topographical map and actual ground data, it’s showed that the difference is only about 2 % and 28%, respectively. The great differences on slope may be due to error during data collection by different enumerators and also inconsistent reading of slope measurement and target. Despite the difficulty occurs during ground data collection, estimation method was applied and this relatively simple procedure but appears acceptable in regard to sufficient data sets at nominal map scale 1:50000.
format Article
author Ismail, Mohd Hasmadi
J. C, Taylor
spellingShingle Ismail, Mohd Hasmadi
J. C, Taylor
Investigation of differences of topographical map and GIS-derived spatial map with actual ground data in Peninsular Malaysia.
author_facet Ismail, Mohd Hasmadi
J. C, Taylor
author_sort Ismail, Mohd Hasmadi
title Investigation of differences of topographical map and GIS-derived spatial map with actual ground data in Peninsular Malaysia.
title_short Investigation of differences of topographical map and GIS-derived spatial map with actual ground data in Peninsular Malaysia.
title_full Investigation of differences of topographical map and GIS-derived spatial map with actual ground data in Peninsular Malaysia.
title_fullStr Investigation of differences of topographical map and GIS-derived spatial map with actual ground data in Peninsular Malaysia.
title_full_unstemmed Investigation of differences of topographical map and GIS-derived spatial map with actual ground data in Peninsular Malaysia.
title_sort investigation of differences of topographical map and gis-derived spatial map with actual ground data in peninsular malaysia.
publisher Canadian Center of Science and Education
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/15300/1/Investigation%20of%20differences%20of%20topographical%20map%20and%20GIS.pdf
http://psasir.upm.edu.my/id/eprint/15300/
http://www.ccsenet.org
_version_ 1643825892950016000
score 13.211869

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