ThinkGeo Cloud
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ThinkGeo Cloud
ThinkGeo UI Controls
ThinkGeo Open Source
Help and Support
External Resources
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This class implements coordinate matching functions. The CoordinatesMatchingPlugin uses serveral DBF and R-Tree index files to accomplish matching operations. street.dbf: Contains non-geographic information for streets. rt2.dbf: Contains coordinate information for streets. tlid.dbf: Contains street TIGER line ID (TLID) and index in street.dbf. Sorted by TLID. zip.dbf: Contains zip code information. rt2.ids and rt2.idx: R-Tree index files for streets by zip.
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This method matches the source text representing coordinates. It initializes the bounding box list for zip codes and tries to find which zip code area contains the coordinates by looping through that list. Next, it gets a street list from the R-Tree index file according to the zip bounding box that was found. It then calculates the distance between the point and the streets, and gets the street that is the shortest distance from the point.
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This method formalizes the source text to get possible coordinates.
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This method is automatically called after an object becomes inaccessible, unless the object has been exempted from finalization by a call to SuppressFinalize.
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