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Merge polygons on the mapview

5 min Medium


This function enables users to combine several overlapping areas into one. For example, merge two sales areas to one larger area if their areas overlap with each other.

To merge two or more polygons, follow these steps:

Step 1. To open the Polygon Merge & Beam window, click the image716 button from the  polygon toolbar icon in toolbar.

merge polygon

Step 2. Select at least two overlapping polygons from the mapview and click the image750 button.

Step 3. Input Name for the merged layer. Select the Target layer and Main polygon from the drop-down list.

(The Target layer is the layer where the merged polygon will be located, it can be a new layer that has the same layer type with the original layer or it can be the original layer; The values of the Main polygon can be transfered to the merged polygon.)

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Step 4.
Edit the values of Target layer field name and Mapping columns:

1. If the source layer and target layer have the same layer type, vMAP will match the field automatically. If they have different layer types, you need to match the Target layer field with Source layer field by clicking and selecting from the drop-down list.

2. Set the Mapping column. vMAP offers 7 options to set the field value.

Option 1. Transfer value from the main polygon: The values of the main polygon will be transfered to the merged polygon.

Option 2. Maximum: The maximum value among the polygons that you selected will be transfered to the merged polygon.

Option 3. Minimum: The minumum value among the polygons that you selected will be transfered to the merged polygon.

Option 4. Number of entries: The number of polygons will be set as the value for the merged polygon.

Option 5. Empty: The value for the merged polygon will be empty.

Option 6. Number of unique entries: The value for the merged polygon will be set as 1.

Option 7. Manually. If you choose Manually, you can set a fixed value for the field by clicking the colorprofile9 button and entering a fixed value in the Set a fixed value for this mapping window.

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Step 5.
After the Name, Target layer, Main polygon, Target layer field and Mapping fields are all filled in, make sure that the polygons' checkbox are checked in the panel above, then click on the image639 button. (See the merged polygon in the screenshot below)

Step 6. Locate the polygon on the mapview, click on the polygon to check the merging result.

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