Filtering data with CQL spatial operators
ECQL does not only let you create readable and powerful filters on feature attributes; obviously, it also lets you filter out geometric properties.
There are a few spatial operators that you can use in a CQL filter: EQUALS, DISJOINT, INTERSECTS, TOUCHES, CROSSES, WITHIN, CONTAINS, OVERLAPS, RELATE, DWITHIN, and BEYOND. With all these operators at your fingertips, you can really build complex filters.
In this recipe, we will use the BEYOND operator that is the inverse of DWITHIN, which we used in the recipe Using WFS spatial filters. With the filter, we will select the populated places located at least 1,000 km away from Rome, Italy. The result is shown in the following screenshot:
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