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

Interactive vectorization Automatic vectorization ___________________________________________________________ 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.

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

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

Grayscale Function Properties   ___________________________________________________________ Advanced GIS UNT Geography  Grayscale Function Properties ❶ ❷  

Converted Grayscale Raster   ___________________________________________________________ Advanced GIS UNT Geography  Converted Grayscale Raster  

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

Create Binary Raster Using CON   ___________________________________________________________ Advanced GIS UNT Geography  Create Binary Raster Using CON  

  ___________________________________________________________ Advanced GIS UNT Geography  Binary Raster  

From Color to Grayscale to Binary   ___________________________________________________________ Advanced GIS UNT Geography  From Color to Grayscale to Binary ❶ Color ❷ Grayscale Binary ❸  

Check ArcScan Extension and Toolbar   ___________________________________________________________ Advanced GIS UNT Geography  Check ArcScan Extension and Toolbar  

Start Editing the Binary Raster   ___________________________________________________________ Advanced GIS UNT Geography  Start Editing the Binary Raster  

Two Toolbars: ArcScan and Editor   ___________________________________________________________ Advanced GIS UNT Geography  Two Toolbars: ArcScan and Editor  

  ___________________________________________________________ Advanced GIS UNT Geography  Cell Selection  

Select Connected Cells   ___________________________________________________________ Advanced GIS UNT Geography  Select Connected Cells  

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

  ___________________________________________________________ Advanced GIS UNT Geography  Start Cleanup  

  ___________________________________________________________ Advanced GIS UNT Geography  Erase Selected Cells  

  ___________________________________________________________ Advanced GIS UNT Geography  Selected Cells Erased  

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

Selected Objects (Labels)   ___________________________________________________________ Advanced GIS UNT Geography  Selected Objects (Labels)  

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

Selected Objects (Labels)   ___________________________________________________________ Advanced GIS UNT Geography  Selected Objects (Labels)  

  ___________________________________________________________ Advanced GIS UNT Geography  Erase Selected Cells  

Set Vectorization Options   ___________________________________________________________ Advanced GIS UNT Geography  Set Vectorization Options  

Set Vectorization Settings   ___________________________________________________________ Advanced GIS UNT Geography  Set Vectorization Settings  

Set Vectorization Settings   ___________________________________________________________ Advanced GIS UNT Geography  Set Vectorization Settings  

Create an empty polyline shapefile (DentonContours)   ___________________________________________________________ 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.  

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

  ___________________________________________________________ Advanced GIS UNT Geography  Vectorized Contours  

Comparison between Input and Output   ___________________________________________________________ Advanced GIS UNT Geography  Comparison between Input and Output  

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