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Standard Deviational Ellipse

Plugin ID: 998

Create a standard deviational ellipse for a set of points

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A standard deviational ellipse is produced according to two methods, with variations. The default method is the on presented by Robert Yuill (1971). This method does not correct for degrees of freedom. The Yuill method does not give a radius equal to the standard distance deviation for a random point distribution (to achieve this, the SDs should be multiplied by sqrt(2), as explained in the CrimeStat documentation). The plugin also offers the CrimeStat / aspace method, where there are corrections for degrees of freedom and with sqrt(2). A polygon vector layer with the standard deviational ellipse is produced, containing the attributes: meanx, meany, majorsd, minorsd, majorangle, directoind and eccentrici as explained in the documentation. The majorangle is counter-clockwise relative to the first axis. An attribute for weighting can be selected. There are no external library dependencies.

Version QGIS >= QGIS <= Date
3.0.5 - 2.99.0 3.98.0 16099 havatv 2020-01-26T17:00:50.380809+00:00
3.0.4 - 2.99.0 3.98.0 3518 havatv 2018-10-17T07:22:13.073852+00:00
3.0.3 - 2.99.0 3.98.0 566 havatv 2018-09-24T06:15:18.484074+00:00
3.0.2 - 2.99.0 3.98.0 675 havatv 2018-08-22T11:46:09.520924+00:00
3.0.1 - 2.99.0 3.98.0 458 havatv 2018-08-17T08:35:58.267745+00:00
3.0.0 - 2.99.0 3.98.0 1231 havatv 2018-04-06T09:03:00.412567+00:00
1.2.3 - 2.0.0 2.99.0 1587 havatv 2018-09-24T06:15:48.350668+00:00
1.2.2 - 2.0.0 2.99.0 426 havatv 2018-08-17T08:36:23.619988+00:00
1.2.1 - 2.0.0 2.99.0 3017 havatv 2017-01-04T15:21:01.543226+00:00
1.2 - 2.0.0 2.99.0 1643 havatv 2016-06-02T12:36:49.749010+00:00
1.1 - 2.0.0 2.99.0 719 havatv 2016-05-31T16:07:58.905222+00:00
1.0 - 2.0.0 2.99.0 869 havatv 2016-05-21T22:53:43.715000+00:00

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