Digitizing in GIS is the process of converting geographic data either from a hardcopy or a scanned image into vector data by tracing the features. During the digitzing process, features from the traced map or image are captured as coordinates in either point, line, or polygon format.

1. Digitizing features
MASHHOOD ARIF

2. Create new feature class
 Created in ArcCatalog
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3. Create new feature class
 Add spatial reference information
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4. Create new feature class
 Add new fields
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5. Create new feature class
 Feature class created
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6. Creating Feature Layers or Shapefiles in ArcMap
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Within ArcMap:
-Locate an existing data layer that is similar to the layer that
you wish to create.
-Start editing the existing layer, then digitize the new feature
-Select the new feature
-Export the selection to a shapefile
-Add the shapefile- fields already present and map projection
is already defined
-Examples in the instructor exercise

7. Digitize new features
 Create base map
 Add feature in ArcMap
 Start editing (Editor toolbar)
 Digitize feature
 Stop editing and save
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8. Create base map for digitizing
 Vector features or raster images
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9. Add new feature class
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10. Add Editor toolbar
 Customize, Toolbars, Editor toolbar
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11. Start editing
 Editor, Start editing
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12. Begin digitizing
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13. Click point (tree) locations
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14. Stop editing
 Editor, Stop editing
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15. Edit attribute data
 Start editing, populate fields in table
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16. ADVANCED DIGITIZING TOOLS
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17. Specify angle and length
 Lines and polygons
 Straight segment tool
 Type length and angle
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18. Snapping tools
 Snapping toolbar
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Point Snapping
Endpoint Snapping
Vertex Snapping
Edge Snapping

19. Trace tool
 Good for complicated shapes
 Editor toolbar, Trace tool
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20. Generalize tool
 Creates features for use at small scales with less detail while
preserving basic shapes
 U.S. Census cartographic boundary files
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Census TIGER water feature City planning rivers

21. Smooth tool
 Smoothes sharp angles in polygon outlines to improve
aesthetic or cartographic quality
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Smooth before Smooth after

22. Cut polygons
 Creates two polygons from one original
 Cut polygon tool
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Polygon before Polygon after