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Positioning Highlight Markers

When you click on a row in the data grid the map will highlight the geometry related to the selected row on the map, normally the highlighting geometry is determined by the geometry associated with the entity that the row corresponds to, but it's also possible to include a coordinate within the data definition that the data grid is displaying and instead have a marker places at that coordinate.

For example a land parcel entity would generally be represented as using a polygon boundary, but if you have water meter records associated with a parcel you could include a coordinate in the water meter data definition so that when a user clicks on a row in the data grid a marker is placed at the location of the water meter on the property rather than having the property boundary highlighted.

To replace the default highlight with a marker in this way you should include a numeric x and y (lower case) parameters in your data definition, which contains the coordinate for the point, you can also include a crs parameter that provides the EPSG code for the projection that the coordinate is stored in, the coordinates will be assumed to be in the same coordinate system as the underlying map if this is not included. Note that you can also use latitude and longitude or lat and lon as the field names, and if the crs parameter isn't included it's be assumed to be WGS84 in this case. It's suggested that a crs parameter always be included to explicitly provide the CRS allowing the same data definition to be used regardless of what CRS is used in the underlying map.

    <data:datadefinition id="water_meter">
        <datasourcedataconnection datasource="db1" table="WATER_METER" key="COMPKEY">
            <parameter column="COMPKEY" />
            <parameter column="CATEGORY" />
            <parameter column="TYPE" />
            <parameter column="OTHER" />
            <parameter name="x" label="X" column="LOCATION_X" type="float" />
            <parameter name="y" label="Y" column="LOCATION_Y" type="float" />
            <parameter name="crs" label="CRS" column="'EPSG:28355'" />
        </datasourcedataconnection>
    </data:datadefinition>
    <data:data id="water_meter" datadefinition="water_meter" entity="water_meter" label="Water Meter"/>

On a final note, it's possible to hide the additional parameters by setting hidden to true when formatting the columns, as described in the examples below.

Examples

<view id='com.cohga.html.client.main.gridView'>
        <label>Identify</label>
        <location>south</location>
</view>

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