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Paper Abstract and Keywords
Presentation 2009-02-20 13:45
Direction estimation using square lattice for cadastral map assembling
Yusuke Takahashi, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura (Mie Univ.) PRMU2008-236
Abstract (in Japanese) (See Japanese page) 
(in English) The technique for automatically assembling the cadastral map separately drawn in each district has been developed. After estimating and normalizing direction of the map, those techniques assemble the map. It causes the error and the failure of the map assembling when there is estimation error of direction. Therefore, accuracy improvement of direction estimation is needed. In a past technique, a direction was
estimated using the north arrow in the map. However, only one north arrow is drawn in the map. Therefore, the estimation error of about $\pm 0.5$ degree on the average is caused by the drawing error of the north arrow. In the proposed technique, direction estimation is performed by the square lattice regularly plotted in the map in addition to the north arrow. Because about tens of square lattices are drawn in the map, the drawing error is less than the north arrow. In the proposed technique, the noise is removed by the area of connected element with the expansion/shrinking processing as a preprocessing of direction estimation. Then, direction estimation is done detecting the square lattice by using the Merlin-Farber method. As a result of the experiment, direction estimation is performed successfully in 485 cadastral maps.
Keyword (in Japanese) (See Japanese page) 
(in English) cadastral map / north arrow / square lattice / direction estimation / Merlin-farber method / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 432, PRMU2008-236, pp. 169-174, Feb. 2009.
Paper # PRMU2008-236 
Date of Issue 2009-02-12 (PRMU) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF PRMU2008-236

Conference Information
Committee PRMU  
Conference Date 2009-02-19 - 2009-02-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Univ. of Tokyo (IIS) 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To PRMU 
Conference Code 2009-02-PRMU 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Direction estimation using square lattice for cadastral map assembling 
Sub Title (in English)  
Keyword(1) cadastral map  
Keyword(2) north arrow  
Keyword(3) square lattice  
Keyword(4) direction estimation  
Keyword(5) Merlin-farber method  
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1st Author's Name Yusuke Takahashi  
1st Author's Affiliation Mie University (Mie Univ.)
2nd Author's Name Wataru Ohyama  
2nd Author's Affiliation Mie University (Mie Univ.)
3rd Author's Name Tetsushi Wakabayashi  
3rd Author's Affiliation Mie University (Mie Univ.)
4th Author's Name Fumitaka Kimura  
4th Author's Affiliation Mie University (Mie Univ.)
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Speaker Author-1 
Date Time 2009-02-20 13:45:00 
Presentation Time 30 minutes 
Registration for PRMU 
Paper # PRMU2008-236 
Volume (vol) vol.108 
Number (no) no.432 
Page pp.169-174 
#Pages 6 
Date of Issue 2009-02-12 (PRMU) 

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