Real-time data collection quality assurance models in three-dimensional spatial information systems |
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| Authors: | HOWARD TURNER |
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| Institution: | Purdue University , West Lafayette, Indiana, 47907, U.S.A. |
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| Abstract: | Abstract Databases used in geographical information systems must be supplied with current data. Maps are usually out of date when they are published. Satellite imagery and aerial photographs supply up-to-date three-dimensional data. Three different models for real-time quality assurance control in three-dimensional data collection for geographical information systems are discussed. Emphasis is placed on the visual detection of ‘blunders’ in three-dimensional data. One data collection quality assurance model has been implemented in the Photogrammetric Analysis Laboratory at Purdue University. An example from this system is given and the precision and speed of digitization of three-dimensional data are discussed. |
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