Calculation of land use demand at nodes

Land Use Demand is allocated to nodes via the Land Use Page of the Node Property Sheet.

In the Land Use grid in the property sheet, Land Use definitions are assigned to the node and a contributing area for each type of land use is allocated to the node. The demand values displayed in the read only cells of the grid are calculated using data from the allocated Land Use definition or from a Land Use Polygon (specified in the Polygon ID field).

The values displayed in the Land Use Page are then used to calculate the Land Use demand at the node. The calculated demand can be viewed on the Node Demand Page of the property sheet.

Land Use Page - Calculation of Demand Values

Demand information in the read only cells in the Land Use Page of the Node Property Sheet is calculated using data from either the selected Land Use Definition or from a Land Use Polygon, (specified in the Polygon ID field).

• If a polygon is specified, polygon demand values will override Land Use Definition demand values.
• If polygon values do not exist, Land Use Definition values will be used instead.

Land Use values in the Node Property Sheet are calculated as follows:

Land Use Page Field	Calculated from Land Use Data	Calculated from Polygon Data
Number of Properties	Calculated as: Property Density x Area x Proportion   where: Property Density is from Land Use Proportion is from Land Use Area is Area field in Land Use Tab of the Node Property Sheet	Calculated as: No. of Props x (Area/Polygon Area) x Proportion   where: No. of Props is from Polygon Proportion is from Land Use Area is Area field in Land Use Tab of the Node Property Sheet
Demand Density	Land Use Demand Density	Calculated from polygon values: Land Use Demand / Polygon Area
Property Density	Land Use Property Density	Calculated from polygon values: No. of Props / Polygon Area
Specific Consumption	Land Use Specific Consumption	Polygon Specific Consumption
Land Use Demand	Land Use Land Use Demand	Polygon Land Use Demand
Proportion	Land Use Proportion	Land Use Proportion

Node Demand Page - Calculation of Land Use Demand

The demand values calculated on the Land Use Page of the Node Property Sheet are used to calculate the land use demand assigned to the node. This demand can be viewed on the Node Demand Page of the node property sheet and is calculated as follows:

Land Use Calculation Method	Demand Calculation
Demand Density	Average Demand = Demand Density x Area x Proportion
Property Density	No. of Properties = Property Density x Area x Proportion   Specific Consumption = Specific Consumption
Land Use Demand	Average Demand = (Area/Land Use Area) x Land Use Demand x Proportion