Intersect Operation

Computes the geometric intersection between two layers
The Intersect Operation takes the features from two source vector layers and computes the intersection between their feature geometries, storing the result on a Result Layer.
If the Source Layer has features selected, the operation will be performed against them, otherwise, the Features from the whole Layer will be used.
The Source Layers are not modified by any means. A new Target Layer is created by default, or the user can specify an existing editable vector Layer where to store the results.

Sample Usage

The Intersect Operation works over the selected features of the desired layers, or over the whole layers if no selection is set.

On this example, we'll start by selecting a single Feature from one of the layers of interest, as shown in Figure 1.

Figure 1. Limit operation scope with selection

Go to the Spatial Operations View, and select Intersect from the Operation drop down.

The Intersect Operation's specific input options will show up (Figure 2).


Figure 2. Intersect Operation controls


Fgiure 3. Progress Dialog

Once the Operation completes, if a new Layer were created to hold the result, it will be automatically added to the current Map.

Figure 4 shows the newly created Layer (Intersect-1, in green) added to the map, with the intersecting feature from the selected Municipality and the Voting Areas Layer.


Figure 4. Operation's Result

(c) Copyright (c) 2004-2008 Refractions Research Inc. and others.