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2.18 Fill polygon with 'holes'

2. GIS data entry

2.18 Fill Polygon with ‘Holes’

Level of expertise required for this Chapter: Advanced; general Map Maker training

If you have a polygon with ‘holes’, which you can not easily ‘fill’, for example with the Join-tool from the toolbar left, you have to run the following process:

1. With the Polygon-tool from the toolbar left, define a polygon around the ‘hole’, and give it the same display label as the main polygon (in this example: 17)

2. The result should look like this:

3. With the Select-tool from the toolbar left you select the main polygon and the new polygon:

The Selection Manager should show the same display labels (2 column).

4. In the Selection Manager window: Actions > Polygon manipulation > Join adjacent polygons of the same display label > (If a warning message of overwriting appears: Yes)

5. You might have to run the previous process (step 4) again, to have the result below.

6. The result should like this:

Note: If there are more units with different labels:
Selection Manager > Actions > IDs and labels > Amend labels and IDs > Amend labels and IDs window: Set all display labels to: Enter the most appropriate code for the label (here: 68) > OK

Sub-Menu:

2.1 Create new layer
2.2 Digitize line
2.3 Digitize point
2.4 Digitize polygon
2.5 Edit existing layer
2.6 Delete feature
2.7 Split line
2.8 Split polygon
2.9 Merge lines from different layers
2.10 Unite lines
2.11 Snap lines
2.12 Join polygons
2.13 Extend polygon
2.14 Insert island
2.15 Define unit surrounding islands
2.16 Create 'doughnut'
2.17 Fill 'doughnut' polygon
2.18 Fill polygon with 'holes' ←
2.19 Digitize parcels from sector layout