Data held by councils on properties in their area, eg geographic coordinates, property boundaries or size, street address, land and capital values, zoning category, and other basic metadata. Some councils already make this data available, eg via the Auckland Council GIS Viewer. However data for only a small number of properties can be extracted at any one time.

Understanding relationships between property values and spatial characteristics (eg proximity to amenities or transport infrastructure). Understanding effect of council spatial plans on property values and urban growth. Understanding how council zoning decisions change over time. Understanding relationships between property values and other characteristics eg income levels, crime rates, education, etc. Understanding how urban density (average property size) varies across time and space.

Allowing independent researchers to undertake geospatial analysis of property values, property sizes, council zoning, and other characteristics.