Property Maps and Aerial Photographs
This page describes the GIS property and mapping system available through the Porirua City Council website.
What is GIS?
A Geographical Information System (GIS) is a computerised database management system for the capture, storage, retrieval, analysis and display of geographically referenced information. This information may include layers such as the roading network, property boundaries, planning boundaries, utilities, heritage sites and aerial photographs. More detailed information such as legal descriptions, site names and road names can be included.
Screenshot: GIS Opening Screen.
The GIS can pull together information stored by all council departments, to provide answers to questions such as "Show me all the properties in the rural zone?" and "How many properties are within a 500 metre radius of a resource consent, and who owns them?"
Once all the information is loaded into the GIS, it can be easily accessed. Different datasets can easily be analysed and compared, either on the computer screen, or printed as a map or spreadsheet. The internet version is designed for simple mapping only.
What data layers are available?
Land Information - We have a Landcover database (LCDB2) showing vegetation etc. There are also soils (NZLRI) and slope contours to show the steepness of land in addition to the parent material. To show surveyed boundaries we have land parcels and this information has been combined to display CT, valuations and rates information.
Census Information - The Census data from Statistics NZ shows meshblocks, Wards and Porirua City boundaries. As well as administrative purposes such as finding which Ward you are within there is demographic information such as population.
Planning Information - The District Plan 1999 provides information regarding zoning, designations, heritage and Tapu sites etc. which is useful for resource consents.
Who can use this information?
Porirua City Council has released useful Geospatial Information to the public for free, or minimal cost. The data includes aerial photographs of the city, contour lines, locations of Council facilities e.g. swimming pools, libraries, public toilets, walking tracks, playgrounds and reserves.
Some hazard information (e.g. wind zones for building consent structural requirements, tsunami evacuation zones are also available from the Koordinates website).
This Geospatial information is typically used in CAD or GIS by architects, students, engineers, consent applicants etc.
Non-technical users can view the information using the Council’s WebMapping system but cannot download directly from the application as yet. Technical users can build smart phone web applications to create value around the data.
The geospatial data is made available under a creative commons license and Council recognises the economic and social benefits of making this information available on the internet.
To access data directly, follow a link below:
What GIS is not?
Global Positioning System (GPS) - GPS can be used to capture data for use in GIS.
Static Maps - Usually either hardcopy (e.g. paper) or digital maps (e.g. PDF). Static maps are a common output from a GIS.
Computer Aided Drafting (CAD) - CAD primarily deals with large-scale models which are relatively small in size, generally without maintaining attributes and geographic coordinates systems (in other words, paper space). Differences between GIS and CAD functions are narrowing.
For more information, please contact:
Porirua City Council
P O Box 50-218
Porirua City Council
Phone (04) 237 1473