02806nam a2200433 4500 20260818144320.0 280898 th eng .b10077704 AIT Thesis no. CS-91-6 Yang, Pao-gaun An investigation of contouring methods Bangkok : Asian Institute of Technology, 1991 82 p. Thesis ; no. CS-91-6 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 1991 Contour maps are a very important tool for urban planning, route selections, Geology analysis, etc. It is necessary to choose a good contouring method and develop a computer package that is able to generate contour maps automatically. In the present study, three methods have been considered. The first method is a gridding local fit by moving average, the second a gridding global fit by Kriging and the third a triangulation by Delaunay triangle. In the Kriging method four models to fit the semi- variogram --linear, exponential, Gaussian, spherical -- were also considered. Several data sets were selected to test the performance of these methods. From the comparisons carried in the study, is appears that no method is good in all cases. As such, three programs were developed for the three methods to constitute a useful software package because they can help the user in their actual directions where any model is possible. Contours (Cartography) Computer graphics H. N. Phien, Chairperson Zhao, Ming, Examination committee Bohez, Erik L.J., Examination Committee The R.O.C. Government, Scholarship donor Asian Institute of Technology. Thesis ; no. CS-91-6 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B17328 .b10077704 mnait x 240410 2 951012 m a x 3 mnait mnait mnarc 22 40 20 Barcode : 30050120677207 CREATED : 1995-10-13 RECORD # : i1007823x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120372932 CREATED : 2016-08-06 RECORD # : i13025922 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121000631 CREATED : 2021-03-03 RECORD # : i13330214 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 64674 64674 0 0 0 0 MAIN MAIN mnait 2026-08-18 10.00 0 AIT Thesis no. CS-91-6 30050120677207 2026-08-18 14:43:20 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. CS-91-6 30050120372932 2026-08-18 14:43:20 2026-08-18 40 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. CS-91-6 30050121000631 2026-08-18 14:43:20 1 2026-08-18 20