getting-started-with-mapserver/workshop/exercises/mapfiles/clusters.map at 699c728c921e5517801d229e80f5b5a2e23a8f62 · MapServer/getting-started-with-mapserver · GitHub

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MAP
    NAME "Clusters"
    EXTENT 26.668678 58.339241 26.796582 58.40941
    UNITS DD
    SIZE 800 600
    PROJECTION
        "epsg:4326"
    END
    FONTSET "data/fonts/fontset.txt"
    WEB
        IMAGEPATH "/tmp/mapserver-data/"
        METADATA
            "ows_enable_request" "*"
            "ows_srs" "EPSG:4326 EPSG:3857"
        END
    END
    SYMBOL
        NAME "circle"
        TYPE ELLIPSE
        POINTS
            1 1
        END
        FILLED TRUE
    END
    LAYER
        NAME "trees"
        STATUS OFF
        TYPE POINT
        CONNECTIONTYPE OGR
        # cluster does not seem to work with the native FLATGEOBUF driver
        # CONNECTIONTYPE FLATGEOBUF
        # DATA "data/osm/natural.fgb"

        CONNECTION "data/osm/natural.fgb"
        CLUSTER
            MAXDISTANCE 20
            REGION "ellipse"
        END

        # LABELITEM "Cluster_FeatureCount"

        # PROCESSING "CLUSTER_ALGORITHM=SIMPLE"
        # PROCESSING "CLUSTER_GET_ALL_SHAPES=OFF"
        # PROCESSING "CLUSTER_KEEP_LOCATIONS=OFF"

        CLASSITEM "Cluster_FeatureCount"

        # class for clustered features
        CLASS
            EXPRESSION ("[Cluster_FeatureCount]" != "1")
            STYLE
                SIZE 30
                # In MapServer 8.2 we can use an expression for SIZE
                # SIZE ([Cluster_FeatureCount] / 3)
                SYMBOL "circle"
                COLOR "#4A993A"
            END
            LABEL
                FONT "LiberationSans"
                TEXT "[Cluster_FeatureCount]"
                TYPE TRUETYPE
                SIZE 12
                COLOR 255 255 255
                ALIGN CENTER
                FORCE TRUE # otherwise numbers can disappear
            END
        END

        # add a class for non-clustered features
        CLASS
            STYLE
                SIZE 20
                SYMBOL "circle"
                COLOR "#4A993A"
            END
            LABEL
                FONT "LiberationSans"
                TEXT "1"
                TYPE TRUETYPE
                SIZE 10
                COLOR 255 255 255
                ALIGN CENTER
            END
        END

    END
END