Attribute

Attributes are data items referring to arrays of data values. Conceptually attributes are characteristics of an entity, think about a column in a table.

In the GeoDMS this means that each attribute belongs to such a table, the so-called domain-unit.

syntax

• Start with the keyword: attribute
• Configure between the less than (<) and greater than (>) characters it’s values-unit.
• Next configure the name of the parameter.
• Configure between normal brackets it’s domain unit.
• For attributes often configured expressions are configured but also other properties can be configured.
• To finalize the definition of an item, configure a semicolon (;) character.

example

attribute<hectare> building (grid_500m) := residential + utility;

The example configures an attribute called building. The values are expressed in hectares, so hectare is configured as values unit.

The domain unit for this attribute is grid_500m, defining a grid with cells of 500 * 500 meter.

The attribute results are calculated with an expression, buildings is defined as the sum of residential and utility.