1. 8. ArcScan 8.1 Interactive vectorization 8.2 Automatic vectorization
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Advanced GIS
UNT Geography 
8. ArcScan
8.1 Interactive vectorization
8.2 Automatic vectorization

2. Interactive vectorization Automatic vectorization
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Advanced GIS
UNT Geography 
ArcScan provides tools for converting scanned images into vector-based feature layers (vectorization) in two ways:
Interactive vectorization
Automatic vectorization
Labs 8.1 and 8.2 are step-by-step exercises for
interactive and automatic vectorization. This lecture provides an example of automatic vectorization using a scanned map in Denon, TX.
To use ArcScan, go to the Customize menu of ArcMap,
select “Extensions…”, then check “ArcScan”. Then open the ArcScan toolbar from Customize  Toolbars.

3. Convert color to grayscale (Image Analysis Window)
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Advanced GIS
UNT Geography 
Convert color to grayscale (Image Analysis Window) ❶ ❸ ❷

4. ❶ ❸ ❷ ❹ ___________________________________________________________
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Advanced GIS
UNT Geography  ❶ ❸ ❷ ❹

5. Grayscale Function Properties
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Advanced GIS
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Grayscale Function Properties ❶ ❷

6. Converted Grayscale Raster
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Advanced GIS
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Converted Grayscale Raster

7. Identify Cell Values for Different Features
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Advanced GIS
UNT Geography 
Identify Cell Values for Different Features
❶Identify Tool
255
❷Click on a cell
241
❸Pixel value
149
127
155

8. Create Binary Raster Using CON
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Advanced GIS
UNT Geography 
Create Binary Raster Using CON

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Advanced GIS
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Binary Raster

10. From Color to Grayscale to Binary
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Advanced GIS
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From Color to Grayscale to Binary ❶
Color ❷
Grayscale
Binary ❸

11. Check ArcScan Extension and Toolbar
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Advanced GIS
UNT Geography 
Check ArcScan Extension and Toolbar

12. Start Editing the Binary Raster
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Advanced GIS
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Start Editing the Binary Raster

13. Two Toolbars: ArcScan and Editor
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Advanced GIS
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Two Toolbars: ArcScan and Editor

14. ___________________________________________________________
Advanced GIS
UNT Geography 
Cell Selection

15. Select Connected Cells
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Advanced GIS
UNT Geography 
Select Connected Cells

16. Select Multiple Objects
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Advanced GIS
UNT Geography 
Select Multiple Objects
Hold down the shift key to select multiple objects

17. ___________________________________________________________
Advanced GIS
UNT Geography 
Start Cleanup

18. ___________________________________________________________
Advanced GIS
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Erase Selected Cells

19. ___________________________________________________________
Advanced GIS
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Selected Cells Erased

20. Select Connected Cells Using Diagonal Length
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Advanced GIS
UNT Geography 
Select Connected Cells Using Diagonal Length

21. Selected Objects (Labels)
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Advanced GIS
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Selected Objects (Labels)

22. ___________________________________________________________
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Advanced GIS
UNT Geography 
Hold the shift and click the selected objects to unselect them if needed.

23. Selected Objects (Labels)
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Advanced GIS
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Selected Objects (Labels)

24. ___________________________________________________________
Advanced GIS
UNT Geography 
Erase Selected Cells

25. Set Vectorization Options
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Advanced GIS
UNT Geography 
Set Vectorization Options

26. Set Vectorization Settings
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Advanced GIS
UNT Geography 
Set Vectorization Settings

27. Set Vectorization Settings
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Advanced GIS
UNT Geography 
Set Vectorization Settings

28. Create an empty polyline shapefile (DentonContours)
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Advanced GIS
UNT Geography 
Create an empty polyline shapefile (DentonContours)
in ArcCatalog, add the shapefile to ArcMap, then
starting editing the shapefile. Use the shapefile as the
Template in the “Generate Features” window.

29. Only lines less than 3 cells wide will be vectorized
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Advanced GIS
UNT Geography 
Only lines less than 3 cells wide will be vectorized
(see settings in previous slides).

30. ___________________________________________________________
Advanced GIS
UNT Geography 
Vectorized Contours

31. Comparison between Input and Output
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Advanced GIS
UNT Geography 
Comparison between Input and Output

32. Review 8.1 Interactive vectorization 8.2 Automatic vectorization
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Advanced GIS
UNT Geography 
Review
8.1 Interactive vectorization
8.2 Automatic vectorization