the Arcscan toolbar is greyed out.

  1. The Arcscan extension is enabled.
  2. The raster is a "bi-level" image
  3. There is an editable polyline layer in the ArcMap TOC

Do you have any idea why i still can't use ArcScan?

  1. Edit: Edit session was started. Unique Value was set. enter image description here

Still not enabled.

@mr.adam how can i check the binary classification? I used copy raster and set the pixel type to 1_BIT

Do I have to consider any other settings?

  • 1
    First step is to double-check the binary classification and to have an edit session open.
    – mr.adam
    Feb 24 '15 at 17:08
  • use Copy Raster (Data Management resources.arcgis.com/en/help/main/10.1/index.html#//… make sure the output image is tiff 1 bit (0 or 1)
    – Mapperz
    Feb 24 '15 at 18:33
  • Make sure the ArcScan extension is activated; under Customize > Extensions.
    – user92549
    Mar 1 '17 at 9:37

Your raster classification is incorrect. You need to change the symbology to either 'Unique Values' or 'Classified', doing this will enable your ArcScan toolbar.

Right click layer > Layer properties > Symbology tab> "Unique Values" or "Classified"

***ArcScan tool bar WILL NOT enable with 'Stretched' or 'Discrete Color' symbolization.

***ArcScan tool bar WILL enable with 'Unique Values' or 'Classified' symbolization.

enter image description here

enter image description here

  • Thanks for your comment but it was already set to unique values.
    – Tama
    Mar 4 '15 at 10:38

Check this help info from ESRI. https://support.esri.com/en/technical-article/000007637

I was having the same problem. I changed the symbology to classified with two categorize and it works.

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