| Abstract: | The U. S. Geological Survey has a requirement for the collection of large amounts of digital map data from existing graphic map separates. Prototype production techniques have been developed to capture line data from the map separates using a raster-scanning input device. After minimal editing in raster form, the data are converted to ‘unstructured‘ vector form. In order to be processed further, the line data must be topologically structured (nodes identified and start-node, end-node, area-left, and area-right tags associated with each line-segment chain). This paper describes the techniques which have been developed at the U. S. Geological Survey to topologically structure the raster-scanned line map data. |
| Genre: | Conference Paper |
| ProdID: | 70013912 |
| Citation Author: | Fegeas, Robin, G.; Pearsall, Richard, A. |
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| Citation End Page: | 272 |
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| Citation Language: | English |
| Citation Larger Work Title: | Technical Papers of the American Congress of Surveying and Mapping |
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| Citation Number Of Pages: | 9 |
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| Citation Publisher: | American Congress on Surveying & Mapping |
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| Citation Search Results Text: | TOPOLOGICAL STRUCTURING OF RASTER-SCANNED LINE MAP DATA.; 1984; Conference Paper; Technical Papers of the American Congress of Surveying and Mapping; Fegeas, Robin, G.; Pearsall, Richard, A. |
| Citation Start Page: | 264 |
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| Citation Year: | 1984 |
| Type: | citation/reference |
| Text: | TOPOLOGICAL STRUCTURING OF RASTER-SCANNED LINE MAP DATA.; 1984; Conference Paper; Technical Papers of the American Congress of Surveying and Mapping; Fegeas, Robin, G.; Pearsall, Richard, A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1984 00:00 -0600 |
| Publisher: | American Congress on Surveying & Mapping |
