Filtering MapsΒΆ

This section shows the GeoServer WMS filtering capabilities.

  1. Navigate to the GeoServer Welcome Page.

  2. Go to the Layer Preview link at the bottom of the left-hand menu and show the geosolutions:WorldCountries layer with OpenLayers ‘Common Format’.

    ../_images/filtering1.png

    Showing the GeoServer layer preview

    ../_images/filtering2.png

    Show the layer with OpenLayers

  3. From the Filter combo box select ‘CQL’ and enter the following command in the text field:

    POP_EST <= 5000000 AND POP_EST >100000

  4. Click ‘Apply Filter’ button on the right.

    ../_images/filtering3.png

    Result of the CQL filter

    The corresponding WMS request is:

    http://localhost:8083/geoserver/geosolutions/wms?service=WMS&version=1.1.0&request=GetMap&layers=geosolutions:WorldCountries&styles=&bbox=-180.0,-89.99889902136009,180.00000000000003,83.59960032829278&width=684&height=330&srs=EPSG:4326&format=image/png&CQL_FILTER=POP_EST%20%3C=%205000000%20AND%20POP_EST%20%3E100000

  5. Now enter the following command in the text field:

    DISJOINT(the_geom, POLYGON((-90 40, -90 45, -60 45, -60 40, -90 40))) AND strToLowerCase(NAME) LIKE '%on%'

  6. Click ‘Apply Filter’ button on the right.

    ../_images/filtering6.png

    Result of the CQL filter

    The corresponding WMS request is:

    http://localhost:8083/geoserver/geosolutions/wms?service=WMS&version=1.1.0&request=GetMap&layers=geosolutions:WorldCountries&styles=&bbox=-180.0,-89.99889902136009,180.00000000000003,83.59960032829278&width=684&height=330&srs=EPSG:4326&format=image/png&CQL_FILTER=DISJOINT%28the_geom%2C%20POLYGON%28%28-90%2040%2C%20-90%2045%2C%20-60%2045%2C%20-60%2040%2C%20-90%2040%29%29%29%20AND%20strToLowerCase%28NAME%29%20LIKE%20%27%25on%25%27

  7. From the Filter combo box select ‘OGC’ and enter the following filter in the text field:

    <Filter><PropertyIsEqualTo><PropertyName>TYPE</PropertyName><Literal>Sovereign country</Literal></PropertyIsEqualTo></Filter>

  8. Click ‘Apply Filter’ button on the right.

    ../_images/filtering4.png

    Result of the OGC filter

    The corresponding WMS request is

    http://localhost:8083/geoserver/geosolutions/wms?service=WMS&version=1.1.0&request=GetMap&layers=geosolutions:WorldCountries&styles=&bbox=-180.0,-89.99889902136009,180.00000000000003,83.59960032829278&width=684&height=330&srs=EPSG:4326&format=image/png&CQL_FILTER=TYPE%20%3D%20%27Sovereign%20country%27

  9. From the Filter combo box select ‘FeatureID’ and enter the following features ids in the text field separated by comma:

    WorldCountries.227,WorldCountries.184,WorldCountries.33

  10. Click ‘Apply Filter’ button on the right.

    ../_images/filtering5.png

    Result of the FeatureID filter

    The corresponding WMS request is:

    http://localhost:8083/geoserver/geosolutions/wms?service=WMS&version=1.1.0&request=GetMap&layers=geosolutions:WorldCountries&styles=&bbox=-180.0,-89.99889902136009,180.00000000000003,83.59960032829278&width=684&height=330&srs=EPSG:4326&format=image/png&FEATUREID=WorldCountries.227,WorldCountries.184,WorldCountries.33