Experience in Building GML-based Interoperable Geo-spatial Systems
Chin-Lung Chang, Yi-Hong Chang, Miller Chiang, Dongpo Deng, Tyng-Ruey- INSTITUTE OF INFORMATION SCIENCE, ACADEMIA SINICA
We report experience in using GML for integrating heterogeneous geo-spatial
datasets in building an experimental geographic information system (GIS).
An GML application schema is developed to serve as an application profile
that include 1/1000 scale
topographic maps, urban land-use zoning maps, and digital terrain models
(DTM). In addition to using and modifying open source data conversion
tools to transfer dgn-, shp-, and grd-formatted datasets to GML-coded
documents, we have also developed our own query tools to retrieve collections
of geo-spatial features from large GML documents. The retrieved collection
of GML-coded geo-spatial features is rendered to SVG at the server-side
and sent to the client-side for visual presentation and navigation.
As the current study is conducted as a pilot project in a municipal administration setting, we shall also summarize in this paper possible organizational and operational issues in moving legacy GIS to large-scale and GML-native GIS.