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I'm trying to do an image classification. I created a polygon with 5 different classes (identified in the Id column; 1-5). I then created a signature file (which took about an hour to complete). When I did the maximum likelihood classification using that sig file, it gave me an immediate error saying there are fewer than 1 class.

I set the data frame to Canada Lambert Conformal Conic. I added the scanned paper map. Added a townships shapefile. Georeferenced it using about 6 control points. Created new shapefile in ArcCatalog using Canada lambert conformal conic as the CRS. Created 3 polygons for each class, differentiating them using 1,2,3,4 or 5 in Id column. Created signature in same folder as other data. Performed MLC using that sig file but it immediately gave me that error.

How do I fix this?

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  • What were the precise steps (tools and all parameter values) that you used? – PolyGeo Aug 3 '17 at 20:33
  • @PolyGeo I set the data frame to Canada Lambert Conformal Conic. I added the scanned paper map. Added a townships shapefile. Georeferenced it using about 6 control points. Created new shapefile in ArcCatalog using Canada lambert conformal conic as the CRS. Created 3 polygons for each class, differentiating them using 1,2,3,4 or 5 in Id column. Created signature in same folder as other data. Performed MLC using that sig file but it immediately gave me that error. – Amy Boddah Aug 8 '17 at 14:57
  • Please use the edit button beneath your question to revise it with any requested clarifications. – PolyGeo Aug 8 '17 at 19:55
  • I don't understand what you mean by "created a polygon". Do you really mean that you created a single polygon and then created five columns for your clases? If so, this is why you are getting an error, you only have one observation. – Jeffrey Evans Nov 27 '17 at 12:13
  • I meant I made a polygon feature class. The ID column for each feature had a number between 1 and 5. – Amy Boddah Nov 28 '17 at 14:28

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