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A thorough investigation of digital ...

Terei, Gabor.

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A thorough investigation of digital terrain model generalization using adaptive filtering.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	A thorough investigation of digital terrain model generalization using adaptive filtering./
Author:	Terei, Gabor.
Description:	151 p.
Notes:	Adviser: Alan Saalfeld.
Contained By:	Dissertation Abstracts International60-11B.
Subject:	Engineering, Civil. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9951735
ISBN:	9780599550360

A thorough investigation of digital terrain model generalization using adaptive filtering.
Terei, Gabor.

A thorough investigation of digital terrain model generalization using adaptive filtering. - 151 p.

Adviser: Alan Saalfeld.

Thesis (Ph.D.)--The Ohio State University, 1999.

The amount of available data in a Geographical Information System (GIS) is growing at a very high rate. Many of the data sets are at different scales, requiring cross-referencing and integration. Real-time data processing and display capabilities of such systems are also at an all-time high, making generalization a feasible and necessary concept for interactive and automated procedures. Digital Terrain Models (DTM) are now a significant component of GIS, thus requiring generalization. An extensive literature review of DTMs---from basic definitions and conceptual frameworks to available algorithms for generalization and different applications---shows that there is no complete solution at the moment due to the lack of analytical theory underlying the generalization procedures.

ISBN: 9780599550360Subjects--Topical Terms:

783781
Engineering, Civil.

A thorough investigation of digital terrain model generalization using adaptive filtering.
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020 $a 9780599550360
035 $a (UMI)AAI9951735
035 $a AAI9951735
040 $a UMI $c UMI
100 1 $a Terei, Gabor. $3 1269134
245 1 2 $a A thorough investigation of digital terrain model generalization using adaptive filtering.
300 $a 151 p.
500 $a Adviser: Alan Saalfeld.
500 $a Source: Dissertation Abstracts International, Volume: 60-11, Section: B, page: 5400.
502 $a Thesis (Ph.D.)--The Ohio State University, 1999.
520 $a The amount of available data in a Geographical Information System (GIS) is growing at a very high rate. Many of the data sets are at different scales, requiring cross-referencing and integration. Real-time data processing and display capabilities of such systems are also at an all-time high, making generalization a feasible and necessary concept for interactive and automated procedures. Digital Terrain Models (DTM) are now a significant component of GIS, thus requiring generalization. An extensive literature review of DTMs---from basic definitions and conceptual frameworks to available algorithms for generalization and different applications---shows that there is no complete solution at the moment due to the lack of analytical theory underlying the generalization procedures.
520 $a This research explores the possibilities of combining theory with practice, that is combining the generalization of the underlying structure (SLM) and other terrain structures with the heuristic methods used to generate visually pleasing views using selective filtering. An algorithm based on the Constrained Delaunay Triangulation has been developed and thoroughly tested, using visual analysis and statistical measures. The results proved that the unification of model generalization and statistical generalization is both feasible and desirable. Several methods for comparing the outcome of generalization procedures have been developed, allowing an objective insight into the underlying structure of the terrain and theoretical aspects that lead to a better understanding to automated generalization procedures.
590 $a School code: 0168.
650 4 $a Engineering, Civil. $3 783781
650 4 $a Geodesy. $3 550741
650 4 $a Physical Geography. $3 893400
690 $a 0368
690 $a 0370
690 $a 0543
710 2 $a The Ohio State University. $3 718944
773 0 $t Dissertation Abstracts International $g 60-11B.
790 $a 0168
790 1 0 $a Saalfeld, Alan, $e advisor
791 $a Ph.D.
792 $a 1999
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9951735