Entropy error model of planar geometry features in GIS |
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Authors: | Li Dajun Guan Yunlan Gong Jianya Du Daosheng |
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Institution: | National Laboratory for Information Engineering in Surveying, Mapping and Remote Sensing , Wuhan University , Wuhan , China |
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Abstract: | Positional error of line segments is usually described by using “g-band”, however, its band width is in relation to the confidence level choice. In fact, given different confidence levels, a series of concentric bands can be obtained. To overcome the effect of confidence level on the error indicator, by introducing the union entropy theory, we propose an entropy error ellipse index of point, then extend it to line segment and polygon, and establish an entropy error band of line segment and an entropy error donut of polygon. The research shows that the entropy error index can be determined uniquely and is not influenced by confidence level, and that they are suitable for positional uncertainty of planar geometry features. |
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Keywords: | union entropy entropy error ellipse entropy error band entropy error donut |
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