Intersection
The Intersection
operation computes the spatial intersection between the objects of
two
layers. The objects of the input layer that have intersection with
the
objects of the overlay layer will be cut and included in an output
layer.
It is
accessed through:
Processing > Vector
Processing > Intersection...
- Input Layer (A): select the input
layer
- Only Selected: optionally, check this box to apply
the intersection over the selected objects on Map Display.
- Overlay Layer (B): select the overlay layer to
intersect with.
- Only Selected: optionally, check this box to apply the
intersection only over selected objects on Map Display.
- Attributes Selection:
select the attributes from A and B that will appear at the
resulting layer. They will be prefixed by 'A_' and 'B_".
- Output: inform where to save the result by clicking
on:
-
to select the output directory
and also inform the new layer name to store the result, or
- Inform the new Layer Name to store the
intersection result (when the repository is a data
source).
- Click OK to perform the operation or Cancel
to close the interface.
Tips:
If the Input Layer and
the Overlay Layer
are in different SRSs (Spatial Reference System) the geometries of
the
Overlay layer will be
converted before executing the operation. If only
one of then have an unknown SRS a message will be issued, since no
conversion will be possible and the result might be
incorrect.
The option to use only
selected
objects from the Input and/or Overlay layers is under development.
to select the output Data
Source