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How is a confusion matrix calculated in ArcGIS?
Computes a confusion matrix with errors of omission and commission and derives a kappa index of agreement and an overall accuracy between the classified map and the reference data. This tool uses the outputs from the Create Accuracy Assessment Points tool or the Update Accuracy Assessment Points tool.
How are the accuracy assessment points generated in ArcGIS?
The accuracy assessment points are generated by the Create Accuracy Assessment Points tool and updated by the Update Accuracy Assessment Points tool. Those two tools ensure that each point with have valid class values for the CLASSIFIED and GROUND_TRUTH fields.
How is the accuracy of the confusion matrix calculated?
Those two tools ensure that each point with have valid class values for the CLASSIFIED and GROUND_TRUTH fields. The tool calculates the user’s accuracy and producer’s accuracy for each class as well as an overall kappa index of agreement. These accuracy rates range from 0 to 1, where 1 represents 100 percent accuracy.
How to calculate producer’s Accuracy in ArcGIS Pro?
Producer’s accuracy is also referred to as errors of omission, or type 2 error. The data to compute this error rate is read in the columns of the table. The Total column shows the number of points that were identified as a given class, according to the classified map.
Which is an example of a confusion matrix?
These accuracy rates range from 0 to 1, where 1 represents 100 percent accuracy. The following is an example of a confusion matrix: User’s accuracy shows false positives, where pixels are incorrectly classified as a known class when they should have been classified as something else.
How to compute confusion matrix ( Spatial Analyst )?
Available with Spatial Analyst license. Available with Image Analyst license. Computes a confusion matrix with errors of omission and commission and derives a kappa index of agreement and an overall accuracy between the classified map and the reference data.