Tree Cover
dataset:
TREE100
Polygons showing tree cover as defined by woody vegetation greater than 2 metres in height and with a crown cover (foliar density) greater than 10%.
Tree cover is mapped down to a minimum area of one hectare.
This layer was derived from LANDSAT TM digital data.
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Citation proposal Citation proposal
(2016) Tree Cover Department of Energy, Environment and Climate Action https://metashare.maps.vic.gov.au/geonetwork/srv/eng/catalog.search#/metadata/1490d477-0c6f-5e30-910b-4032eaf9895a |
- Description
- Temporal
- Spatial
- Maintenance
- Format
- Contacts
- Keywords
- Resource Constraints
- Lineage
- Metadata Constraints
- Quality
- Acquisition Info
- Raster Data Details
- Raster Type Details
- Point Cloud Data Details
- Contour Data Details
- Survey Details
Simple
Description
- Title
- Tree Cover
- Alternate title
- TREE100
- Purpose
- To be used as a base cover of permanent tree cover for most purposes. Areas of temporary change have been removed. This layer depicts polygons showing tree cover as defined by woody vegetation greater than 2 metres in height and with a crown cover (foliar density) greater than 10%. Tree cover is mapped down to a minimum area of one hectare. This layer was derived from LANDSAT TM digital data.
- Credit
- Adam Gilbee, John White, Luong Tran.
- Supplemental Information
- History: This layer replaces the TREE100_9093 dataset that was removed from the Corporate Geospatial Library in November 1995. It also supersedes the TREE100_90 dataset which was dropped on 7 June 1996. Relationship to other Datasets: There will be a layer that depicts tree cover change. Current Design Issues: The layer was created to give an accurate assessment of tree cover extent for the state of Victoria and to provide a baseline dataset for further projects based around tree cover. This layer shows the presence or absence of trees only. Future Design Issues: There will be a layer developed that shows tree cover change. This layer may be used as a base for future tree cover mapping in 1995. Related Documents: None Tree cover change in Victoria c.1869-1993. "An outline of methods for mapping and monitoring", Adam Gilbee, NRE (1999).
- Status
- Completed
Temporal
Spatial
- Horizontal Accuracy
- 100m
- Code
- 4283
Maintenance
- Maintenance and update frequency
- Unknown
Format
Contacts
Point of contact
Department of Energy, Environment and Climate Action
-
VSDL Data Manager
(VSDL Data Manager)
PO Box 500
East Melbourne
Vic
3002
Australia
Cited responsible party
No information provided.
Cited responsible party
No information provided.
Cited responsible party
No information provided.
Cited responsible party
No information provided.
Cited responsible party
No information provided.
Keywords
- Topic category
-
- Biota
- Farming
Resource Constraints
- Classification
- Unclassified
Lineage
- Statement
- Dataset Source: Data was originally sourced from LANDSAT TM5 satellite images from Summer 1990 and 1993. Dataset Originality: Primary
- Description
- Collection Method: Remote Sensed - Satellite Field Measurements Field Notes Aerial Photo Interpretation Maps Expert Interviews Existing GIS datasets
- Description
- Digital (unsupervised) classification to produce 100 classes per LANDSAT TM scene carried out on ER Mapper. One hundred classes were assigned as having tree cover present or absent for each year. Tree cover classifications for each year were overlayed in GRID and a change dataset produced. Areas of change were checked and edited using aerial photography, local knowledge, existing maps, GIS analysis and field checking to produce areas of permanent and temporary change. The tree covered area includes areas of tree cover in both 1990 and 1993 plus areas of 1993 regrowth plus areas not tree covered due to temporary changes.
Metadata Constraints
- Classification
- Unclassified
Quality
Attribute Quality
- Comments
- A random sampling technique was applied to each mapsheet of the 1990 dataset to assess reliability. Reliability varied from 81% to 89% averaging 84.5% across Victoria. The 1993 dataset highlighted errors in the 1990 dataset which were corrected resulting in a much improved accuracy over that initially sampled.
Positional Accuracy
- Comments
- Precision: 10 m to 100 m Determination: GPS and statistical analysis.
Conceptual Consistency
- Comments
- Not relevant
Missing Data
- Comments
- Complete for Victoria Complete for Victoria
Excess Data
Acquisition Info
Raster Data Details
Point Cloud Data Details
Contour Data Details
Survey Details
Overviews
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Views Views
1490d477-0c6f-5e30-910b-4032eaf9895a
Access to the portal Access to the portal
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Associated resources
Not available