Surveying & Built Environment Vol. 22 Issue 1 (December 2012)
Surveying & Built Environment Vol. 22 Issue 1 (December 2012)
Surveying & Built Environment Vol. 22 Issue 1 (December 2012)
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SBE<br />
74<br />
direct Geo-referencing and<br />
orthophoto Correlation with<br />
demarcation district Sheets<br />
Conrad H. W. Tang* and H. D. Zhang**<br />
ABSTRACT<br />
This paper introduces two methods of deriving horizontal coordinates from a<br />
Demarcation District Sheet. The first method performs geo-referencing using longlasting<br />
prominent features on a Demarcation District Sheet directly. The second<br />
method performs geo-referencing against the 1963 orthophoto images, and this<br />
method is recommended and expected to have a wide application in the land<br />
boundary industry.<br />
KEY WoRdS<br />
Demarcation District Sheets, geo-referencing, orthophoto, land Boundary Record<br />
*Associate Professor, Department of Land <strong>Surveying</strong> and Geo-Informatics, The Hong Kong Polytechnic<br />
University. Email: lstang@polyu.edu.hk<br />
**Department of Land <strong>Surveying</strong> and Geo-Informatics, The Hong Kong Polytechnic University. Email:<br />
zhdong66@gmail.com