A new approach to the reconstruction of contour lines extracted from topographic maps

SAMET R., Hancer E.

JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION, cilt.23, sa.4, ss.642-647, 2012 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 23 Sayı: 4
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.jvcir.2012.02.005
  • Dergi Adı: JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.642-647
  • Anahtar Kelimeler: Topographic maps, Contour lines, Gaps and end points, Reconstruction, Geometric properties, Feature extraction, Geophysical image processing, Cartography
  • Ankara Üniversitesi Adresli: Evet

Özet

It is known that after segmentation and morphological operations on topographic maps, gaps occur in contour lines. It is also well known that filling these gaps and reconstruction of contour lines with high accuracy is not an easy problem. In this paper, a nontrivial semi-automatic approach to solve this problem is proposed. The main idea of the proposed approach is based on local and geometric properties such as (1) parabolic and opposite directions, (2) the differences of y-ordinate of end points, (3) changing the directions of x-axis and y-ordinate to the nearest clockwise direction and (4) avoiding the use of the second end point of a small piece of any contour line in the same mask if its other end point is used. The proposed approach was implemented on the base of many topographic maps with different resolutions and complexity. The obtained results show that the proposed approach increases accuracy and performance. (c) 2012 Elsevier Inc. All rights reserved.