13.6. Geometric Functions

These geometric functions are available for use in formulas in Cartographica. To use them, you must always specify geometry.function(parameters). For example, to obtain the area of the current geometry (valid only for polygons), you would use geometry.area().

float geometry.area( useBase);
[bool useBase];

Returns the area in the current coordinate system units, using either the map coordinates (useBase is 0 or not present) or the original layer coordinates (useBase is 1).
This function is only available for polygons.
float geometry.length( useBase);
[bool useBase];

Returns the length in the current coordinate system units, using either the map coordinates (useBase is 0 or not present) or the original layer coordinates (useBase is 1).
This function is only available for polygons and lines
float geometry.bbox( useBase);
[bool useBase];

Returns the rectangle of the bounding box of the current geometry using either the map coordinates (useBase is 0 or not present) or the original layer coordinates (useBase is 1).
The return value is a structure containing x,y,width, and height. To access each individual element, use the dot notation: geometry.bbox().x to retrieve the x coordinate, for example.
float geometry.midpoint( useBase);
[bool useBase];

Returns the midpoint of the line in the current coordinate system, using either the map coordinates (useBase is 0 or not present) or the original layer coordinates (useBase is 1).
This function is only available for lines.
float geometry.centroid( useBase);
[bool useBase];

Returns the centroid of the feature in the current coordinate system, using either the map coordinates (useBase is 0 or not present) or the original layer coordinates (useBase is 1).
This function is only for points, multipoints, and polygons.


	This function is only for points, multipoints, and polygons.