Tree Cover Change in Victoria Between 1990 and 1993
dataset:
TCH100_9093
This layer contains polygons showing tree cover change as defined by woody vegetation greater than 2 metres in height and with a crown cover (foliar density) greater than 10 percent. Tree cover is mapped down to a minimum area of one hectare. Attributes outlining the causes of tree cover change are assigned for areas greater than 1 hectare. This layer was derived from LANDSAT TM digital data.
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Citation proposal Citation proposal
(2007) Tree Cover Change in Victoria Between 1990 and 1993 Department of Transport and Planning https://metashare.maps.vic.gov.au/geonetwork/srv/eng/catalog.search#/metadata/a089f3c2-e309-5f7e-aff2-3fcd79e107b2 |
- 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 Change in Victoria Between 1990 and 1993
- Alternate title
- TCH100_9093
- Purpose
- This layer depicts polygons showing tree cover change as defined by woody vegetation greater than 2 metres in height and with a crown cover (foliar density) greater than 10 percent. Tree cover is mapped down to a minimum area of one hectare. Areas of tree cover change are mapped down to a minimum area of 1 hectares. This layer was derived from LANDSAT TM digital data.
- Credit
- Adam Gilbee, John White, Luong Tran, Isabel Coppa, Rick Frisina, Adam Choma.
- Supplemental Information
- Relationship to other Datasets: TREE100 layer had been derived from this layer. FCOV1000_1869 and FCOV500_7287 were both mapped at a scale of 1000000 and 500000 respectively. Furthermore the forest cover data for the FCOV1000_1869 layer were manually mapped from historical manuscript and for the FCOV500_7287 layers, forest cover boundaries were manually mapped from Landsat MSS transparencies. Therefore these two layers are different from TCH100_XY and TREE100 in terms of mapping method, scale and details. 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 only the change in tree cover. Related Documents: None Tree Cover Change in Victoria 1869 to 1993 An outline of Methods for Mapping and Monitoring.Natural Resource Systems.
- Status
- Completed
Temporal
Spatial
- Horizontal Accuracy
- 100m
- Code
- 4283
Maintenance
- Maintenance and update frequency
- Irregular
Format
Contacts
Point of contact
Department of Transport and Planning
-
John White
(Remote Sensing/GIS Analyst, Custodian - Vicmap Imagery & Vegetation)
P O Box 500
East Melbourne
VIC
3001
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
- Imagery base maps earth cover
- Farming
Resource Constraints
- Use limitation
- Data is available under licence.
- Classification
- Unclassified
Lineage
- Statement
- Dataset Source: Data was originally sourced from LANDSAT TM5 satellite images from Summer 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.
Metadata Constraints
- Classification
- Unclassified
Quality
Attribute Quality
- Comments
- A random sampling technique was applied to each map sheet of the 1990 dataset to assess reliability. Reliability varied from 81 to 89 percent 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: 10m to 100m Determination: GPS and statistical analysis
Conceptual Consistency
- Comments
- Not applicable
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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a089f3c2-e309-5f7e-aff2-3fcd79e107b2
Access to the portal Access to the portal
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Associated resources
Not available