Trees

Disclaimer

Geoscape Australia believes this publication to be correct at the time of printing and does not accept responsibility for any consequences arising from the use of the information herein. Readers should rely on their own skill and judgement to apply information to particular issues.
This work is copyright. Apart from any use as permitted under the Copyright Act 1968, no part may be reproduced by any process without prior written permission of Geoscape Australia.

Overview

Trees is a raster dataset representing tree coverage and heights, derived from remotely sensed imagery.

Geoscape Australia welcomes your feedback on the Trees Dataset. We also publish regular product development updates on our website (www.geoscape.com.au).

Release Summary

This product was released to customers on 27 June 2024 with data extracted on 12 June 2024.

  • This release is a full national data population for Version 1.8 of the Trees product, described by the Trees Product Description v1.8.

Any issues that have been identified for this release are described in the Issues section.

This release includes updates for the areas listed in the table below.

Locations of updated areas by State

State

Location

Urban Area (km2)

QLD

Brisbane City

360

QLD

Cairns Regional

151

QLD

Ipswich City

268

QLD

Logan City

81

QLD

Mackay Regional

82

QLD

Moreton Bay City

232

QLD

Redland City

65

QLD

Townsville City

197

SA

Adelaide Hills Council

4

SA

Adelaide Plains Council

50

SA

Alexandrina Council

24

SA

Campbelltown City Council

29

SA

City of Adelaide

15

SA

City of Burnside

25

SA

City of Charles Sturt

61

SA

City of Holdfast Bay

14

SA

City of Marion

56

SA

City of Mitcham

55

SA

City of Onkaparinga

198

SA

City of Playford

101

SA

City of Port Adelaide Enfield

104

SA

City of Prospect

9

SA

City of Salisbury

103

SA

City of Tea Tree Gully

66

SA

City of Unley

14

SA

City of Victor Harbor

24

SA

City of West Torrens

37

SA

Light Regional Council

22

SA

Mount Barker District Council

39

SA

The Barossa Council

5

SA

The City of Norwood Payneham and St Peters

15

SA

The Corporation of the Town of Walkerville

4

SA

Town of Gawler

40

VIC

Ballarat City

154

VIC

Glenelg Shire

79

WA

City of Busselton

98

Total

2881

^ Location names are derived from intersection with the most recent Local Government Area dataset.

Spatial files of the updated areas are available upon request via support@geoscape.com.au.

Change Notifications

ACT, Queanbeyan-Palerang and Yass Valley Regions

A Review of the Buildings capture data during processing has led to the removal of the following areas mentioned in the pre-release report.

  • ACT

  • Quenbeyan-Palerang Regional Council

  • Yass Valley Council

These Regions will not be updated in the June Release and will rescheduled to be updated in a future release.

Removal of the ‘Documents’ folder from data packages

Geoscape has moved product descriptions, guides and reports online to https://docs.geoscape.com.au From this release onwards, data packages will no longer include the ‘Documents’ folder.

Issues

New Issues

No new issues to note.

Resolved Issues

No resolved issues to note.

Known Issues

The progress and status of known, ongoing issues are summarised below. For specific and further details on each issue, please refer to the Release Report identified in the ‘Release identified’ column.

Ongoing product issues

Release Identified

Theme - Issue Name

Issue Brief Description

Progress/Resolution

Status

Dec-16

Building - Tree heights near buildings and other trees

Terrain elevation values used in the calculation of tree heights have been found in some cases to be affected by the surrounding tall features such as buildings and other trees.

No update at this time.

Open

Mar-22

Trees over-capture

On Buildings, it has been observed that there are some situations where significant portions of some roofs have been captured as tree features. This is different from actual tree overhang and may be due some combination of building proximity to actual tree features, dark roof colour and/or shadow across roofs. In Dense, Shadowed and Water Areas, the spectral signature of these areas can incorrectly result in features being extracted as trees during remote sensing. Height calculation can help to exclude the majority of these during production, but where heights are determined to be greater than 2 metres they may persist.

We are working with our partner to limit these occurrences, as well as improving our processes to identify and correct the situations where they are present.

Open

Jun-22

Trees restricted to Surface Cover extents

Trees and Surface Cover have been designed to physically align the cells. Since the introduction of new capture methods new capture areas that extend past the raster index are clipped.

This will be investigated and resolved in a future release.

Open

Future Considerations

This section outlines enhancements or changes under consideration, but not planned into a specific release. For further details on future initiatives, please contact Geoscape Support.

Annex A – Release Counts

Trees Theme - Summary

Total coverage of Trees by state

State

Total Area (km2)

QLD

2578

VIC

1434

ACTNSW

6512

TAS

288

NT

186

SA

346

WA

718

National

12061