Simplify an informed track using resultset. Each register of the resultset indicaes a point of the track. The column 1 of the resultset must contain the latitude and the column 2 the length of the point.

1 geo.getSimplifiedTrack

<geo.getSimplifiedTrack tolerance='tolerance'>
    <rs /> +
</geo.getSimplifiedTrack>

Attributes
Name	Type	Required	Default	Description
Atolerance	decimal				Tolerance parameter used in the algorithm.

Arguments
Name	Type	Required	Unique	Nullable	Description
Ers					ResultSet with the columns latitude and length.

Example

Simplify a track.

Copy

<xsql-script>
    <body>      
        <return>
            <geo.getSimplifiedTrack tolerance="0.01">
            <select>
                <columns> lat, lng </columns>
                <from table='mships' />
            </select>
            </geo.getSimplifiedTrack>     
        </return>
    </body>
</xsql-script>

Notas

The algorithm used is:

http://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm