Evaluation of third class survey data for national digital cadastral database population
The objective of Digital Cadastral Database (DCDB) introduced 'by the Department of Survey and Mapping Malaysia (DSMM) is to ease the production of land title and to facilitate the realization of e-cadastre system. The development of e-cadastre system is to change the existing method of cada...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2009
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/7195/1/24p%20ABD.%20SUKOR%20SARIF.pdf |
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| Summary: | The objective of Digital Cadastral Database (DCDB) introduced 'by the
Department of Survey and Mapping Malaysia (DSMM) is to ease the production of
land title and to facilitate the realization of e-cadastre system. The development
of e-cadastre system is to change the existing method of cadastral management to
fully digital system in accordance with information technology development.
National Digital Cadastral Database (NDCDB) is a critical dataset in e-cadastre
system. Currently, DCDB was developed based on First Class and Second Class
observations. This criterion caused the Third Class survey data is left out because of
the low data quality. Third Class survey data is a value of scale distance without
bearing or connection line. A new methodology is needed in order to integrate Third
Class survey data into DCDB. The objectives of this study are: i) to check the quality
of an existing Third Class survey, and ii) to adjust the Third Class survey of the study
area with acceptable accuracy. Least Square Adjustment technique was used because
the measurements with differences quality can be systematically adjusted. The
cadastral network was formed into several parts and the least square adjustment were
carried out systematically to minimum the error propogations. Systematic summary
of the adjustment results are tabulated. Locality adjustments give good results while
the adjustments of inter CP's are less accurate. Results show that the existing Third
Class survey is not suitable to be integrated in developing of NDCDB. Upgrading the
Third Class survey Certified Plan to more accurate First Class survey is important for
repopulation of NDCDB. |
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