Saved Properties

When to use it

• You are choosing between several blocks and want the terrain numbers in one table.
• You want to come back to a shortlist later without re-selecting each parcel.

How to use it

1. Select a parcel, or draw or upload a boundary.
2. Choose Analyse and save property. The terrain is sampled and the snapshot is stored.
3. Repeat for up to five places. The table updates as each one finishes.
4. Add notes per property, and export the shortlist as a JSON file to keep or share.

How it works

For each saved boundary the tool loads the terrain, computes mean and range of elevation, slope classes, modelled direct sun hours on the shortest day, and a drainage indicator from flow accumulation, then stores the results with the boundary.

Everything lives in your browser's local storage. Nothing is sent to a server or tied to an account, which is also why the list is per device.

Reading the results

Compare like with like: a 4 ha block and a 40 ha block will differ in range simply because of size.

Winter sun hours are modelled on bare ground for 21 June and ignore trees and buildings.

Limits and warnings

• Five snapshots per browser. Saving the same boundary again replaces its snapshot.
• Clearing site data in the browser removes the list. Export the JSON first if you want to keep it.
• Where 1 m LiDAR has not been flown the tool falls back to the national 8 m elevation model, and the result says what share came from the fallback. The 8 m model was interpolated from 20 m map contours and is not fit for site-scale decisions.

Data and attribution

Results come from the LINZ national 1 m LiDAR bare-earth elevation model, read in your browser, with the national 8 m model filling any gaps. Tools that use the surface model (Sunlight, Viewshed, Object Heights) read the matching LiDAR surface tiles.

Elevation and cadastral data is sourced from the LINZ Data Service and licensed for re-use under the Creative Commons Attribution 4.0 International licence. Copyright in each LiDAR survey belongs to the body that commissioned it — a regional or district council, Waka Kotahi, NIWA and around thirty others — rather than to LINZ, which hosts and processes the national dataset. Every file exported from this site names the licensors whose surveys cover the area, and anything you publish from those files carries the same attribution requirement. See https://www.linz.govt.nz/products-services/data/licensing-and-using-data/attributing-elevation-or-aerial-imagery-data

Related

Neighbouring tools

• Property — Selects the legal parcel under your click and uses its real boundary as the analysis area for every other tool.
• Property Report — Builds a multi-page PDF terrain report for one parcel: shaded relief, contours, slope and aspect breakdowns, elevation statistics, and a checklist of the official records the report does not replace.
• Find Matching Areas — Highlights every patch of ground inside your area that is flatter than a chosen slope, faces a chosen direction and gets at least a chosen number of hours of winter sun.