Topological Error Correcting in GIS

It is agreed upon that topological relations ore of great importance regarding to GIS data sets consistency. A lot of errors that can be found in GIS data sets are coming from a lack of knowledge about topological relations between the geographical objects stored in the database. Consequently, topology can help to find errors in GIS data sets, and can help to correct them. The topic of this paper is to present how topological relation can be used to detect and to correct errors in GIS data sets. Such an approach required three partsÊ: the definition of errors, how to check the database and how to correct errors. This paper focus on the first and the third part. Error will be described using topological integrity constraints. This method allowed one to define the constraints that fit its own data set, and then allowed to take the semantics of data into account. Correction will be made by applying transformations to the data. For each error, a set of possible corrections will be comput...

• Type: Conference
• Year: 1997
• Where: SSD
• Authors: Thierry Ubeda, Max J. Egenhofer
• Keywords: Correct Errors, Database, GIS Data Sets, SSD 1997, Topological Relation