Geographical functions

These functions are used to handle geographical data in map visualizations.

Use the drop-down on each function to see a brief description and the syntax of each function. Click the function name in the syntax description for further details.

Parameters used in geographical functions

Geometry

This can be any of the following:

a point (latitude, longitude)
an area

The reference should be to a field containing the geometry representation.

Projection

With Mercator projection you can represent maps in square format, correcting for the distortion created by stretching.

This can be any of the following:

'unit' (default) - projection is 1:1
'mercator'

This function can be used to aggregate a number of areas into a larger area, for example aggregating a number of sub-regions to a region.

GeoAggrGeometry(geometry)

This function can be used in scripts to aggregate a geometry into an area and calculate the smallest GeoBoundingBox that contain all coordinates.

A GeoBoundingBox is represented as a list of four values, left, right, top, bottom.

GeoBoundingBox(geometry)

This function can be used to get a count of how many vertices a polygon geometry contains.

GeoCountVertex(geometry)

This function can be used in scripts and chart expressions to calculate the smallest GeoBoundingBox that contain all coordinates of a geometry.

A GeoBoundingBox is represented as a list of four values, left, right, top, bottom.

GeoGetBoundingBox(geometry)

This function can be used in scripts and chart expressions to calculate and return the center point of a geometry.

GeoGetPolygonCenter(geometry)

This function can be used in scripts to aggregate a geometry into an area and apply the inverse of a projection.

GeoInvProjectGeometry(projection, geometry)

This function can be used in scripts and chart expressions to create and tag a Point with latitude and longitude.

GeoMakePoint(latitude, longitude )

This function can be used in scripts and chart expressions to apply a projection to a geometry.

GeoProject(projection, geometry)

This function can be used in scripts to aggregate a geometry into an area and apply a projection.

GeoProjectGeometry(projection, geometry)

This function can be used in scripts to aggregate a geometry into an area.

GeoReduceGeometry(geometry)

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