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Title: The geospatial metadata server : on-line metadata database, data conversion and GIS processing
Author: Pradhan, Anup
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 2000
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This research proposes an on-line software demonstrator called the Geospatial Metadata Server (GMS), which is designed to catalogue, enter, maintain and query metadata using a centralised metadatabase. The system also converts geospatial data to and from a variety of different formats as well as proactively searches for data throughout the Web using an automated hyperlinks retrieval program. GMS is divided into six components, three of which constitute a Metadata Cataloguing tool. The metadatabase is implemented within an RDBMS, which is capable of querying large quantities of on-line metadata in standardised format. The database schema used to store the metadata was patterned in part off of the Content Standard for Digital Geographic Metadata, which provides geospatial data providers and users a common assemblage of descriptive terminology. Because of the excessive length of metadata records, GMS is equipped with a parsing algorithm and database entry utility that is used to enter delimited on-line metadata text files into the metadatabase. Alternatively the system provides a metadata entry and update utility, which is divided into a series of HTML forms each corresponding to a metadatabase table. The utility cleverly allows users to maintain their personal metadata records over the Web. The other three GMS components constitute a Metadata Querying tool. GMS consists of a search engine that can access its metadatabase, examine retrieved information and use the information within on-line server side software. The search engine integrates the metadatabase, on-line geospatial data and GIS software (i.e. the GMS conversion utilities) over the Web. The on-line conversion utilities are capable of converting geospatial data from anywhere on the Web solving many of the problems associated with the interoperability of vendor specific GIS data formats. Because the conversion utilities operate over the Web, the technology is easier to use and more accessible to a greater number of GIS users. Also integrated into the search engine is a Web robot designed to automatically seek out geospatial data from remote Web sites and index their hypertext links within a file or database.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available