Bridging Two Geography Languages: Experience in Mapping SEF to GML

author: Chin-Lung Chang, Yi-Hong Chang, Tyng-Ruey Chuang, Steve Ho and Feng-Tyan Lin
publication date: July 2003
cite this with: Chin-Lung Chang, Yi-Hong Chang, Tyng-Ruey Chuang, Steve Ho and Feng-Tyan Lin. Bridging Two Geography Languages: Experience in Mapping SEF to GML. At GML Dev Days: 2nd GML Developers Conference. Vancouver, Canada. July 2003.
link this with: http://tsm.iis.sinica.edu.tw/papers/gml03/
copyright: all rights reserved
category: XML and Web Technologies
tag: GIS, GML, SVG, Schema Mapping, SEF
full paper: html

Abstract

We report our experience in mapping SEF — a data exchange standard for topographic map in Taiwan — to GML. Often there are two goals in such a schematic mapping: Preservation and improvement. That is, the new vocabulary must be used in a way that it losslessly carries over all information that is expressible in the old format, but at the same time opens up opportunities for new functionalities. We discuss in this paper the requirements and design choices we face in mapping the SEF data format to a GML application schema, as well as various visualization issues in a GML-to-SVG mapping. We have built the necessary SEF-to-GML and GML-to-SVG conversion tools, and have used them to process and visualize existing topographic data. Real-world examples are shown in this paper.

 
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