Save the new Signature File and close the Signature Editor table.Ĥ. With the two merged classes still selected, go to Edit > Delete to get rid them. Notice that a new class containing the data that you merged has been added to the lastrow in your table. In thisexample we will be merging classes 2 and 3 that were generated from an unsupervised classification into ninetotal classes. Hold down the shift key and then click on the other class(es) being merged. To do this, click on the row of one of the Class#'s that you want to merge. Tomerge two classes, you first need to select them from the table. You may want to do this after you go into the field and decide that two of the classes thatwere separately grouped during the unsupervised classification are really the same thing (i.e. This part of the exercise will show you how tomerge two classes. sig file is open, you may begin to edit it. The classes that you see here are thosethat were generated by the unsupervised classification and are based on spectral properties.ģ. You should now get values in your Signature Editor table. sig file that you named in your unsupervisedclassification.
Go to the File menu in the Signature Editor window and open the. Select Signature Editor from the menu and aSignature Editor table will appear. Begin by opening ERDAS from your Start Menu: Start > Programs > ERDAS IMAGINE Click on theĬlassifer button located in the main menu bar. This exercise will show you how to edit the signature file created from an Unsupervised Classification,perform a Supervised Classification, and check your data for accuracy by using Accuracy Assessment inERDAS.Ģ.
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