i am using arcgis 9.3.1 at my college. its is quite an old version.in a new file in arcmap i have added a georeferenced .tiff file and a feature class(type polygon). i have set the spatial reference same for both the feature class and the .tiff file. but when i try editting i get the error messgae.
The feature cannot be created.The geometry is invalid.
Any kind of help shall be appreciated.