NZ Cadastral Parcel Boundaries

Cadastral parcel boundaries from LINZ BDE November 2009

Supplied as polylines coded by boundary type in featurecode. These codes are defined by Corax, they are no longer in the cadastral design. The polylines are derived from the parcel polygons, not the survey lines.

These are often more useful than parcel polygons in simple systems.

Boundary lines are split at nodes (junctions) so they can have a separate featurecode to indicate the edge type. This enables road casings, water boundaries and internal boundaries to be separately symbolised. Boundaries are only drawn once, compared to drawing polygon edges where each parcel is drawn twice.

• featcode description
• parcel_bdy normal boundary between parcels
• hyd_bdy parcel to hydro boundary
• r_r_bdy road-rail boundary (road casings)
• h_line internal hydro line (hide or delete)
• r_line internal road line (hide or delete)
• parcel_int boundary between two parcels in same title

Since most parcels need to be drawn with no fill, it is much more efficient to create a map with parcel polylines and labels, and only draw sparse polygons with a fill, such as roads, water and reserve polygons.

If you need to do analysis that requires polygons, then select parcels as polygons.

Spatial accuracy is extreme in urban areas because the lines have been sourced from survey field books 95% of coords within 0.02 metres (order 7). Rural areas remain as digitised off 1:50,000 index maps with 95% of coords within 20 metres. Marks are available that tag each node with an accuracy in the full survey database. Source LINZ BDE. Reloaded after seeing only part updated.