Relative Forest Growth Stage Classification
dataset:
GSTAGE100
This layer contains the relative forest growth stage classes. The classification is based on Eucalypt growth stages identified by Max Jacobs (Growth habits of the eucalypts, 1955) and described in terms of the relative contribution of irregular to regular to regrowth forms to the total crown cover. The data has been collected to SFRI standards for the old growth forest mapping program.
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Citation proposal Citation proposal
(2022) Relative Forest Growth Stage Classification Department of Energy, Environment and Climate Action https://metashare.maps.vic.gov.au/geonetwork/srv/eng/catalog.search#/metadata/0b59a011-05df-55fb-bd9c-54be72b5be2c |
- 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
- Relative Forest Growth Stage Classification
- Alternate title
- GSTAGE100
- Purpose
- This layer delineates one of the core forest resource attributes at 1:100,000 required for the delineation of old-growth forest. The layer is vital to the old-growth forest analysis process that draws on forest resource and disturbance themes to stratify the forest in a repeatable and quantifiable way to determine areas of forest that meet the current definition of old-growth forest. The layer should be used in conjunction with the EVC100 layer to take into account those EVCs that exhibit non - Jacobsian growth habits. That is, some EVCs will never exhibit late mature or senescing growth stages and the mature stage will be the oldest form.
- Credit
- The dataset has been collated by LIG. The original authors of the data are: 1/. Forest Resource Inventory in Melbourne for SFRI sourced data. 2/. FRI in Bendigo for Goldfields sourced data. 3/. P Black and P Woodgate for C.High and E.Gipp sourced data
- Supplemental Information
- Relationship to other Datasets: For selected areas, including the North-East, Gippsland, Midlands-Otways & Portland-Wimmera GSTAGE100 continues information derived from the 1:25,000 forest stand class dataset developed under the SFRI. The GSTAGE100 layer must be used in conjunction with EVC100 due to limitations with forest growth staging for some EVCs. Current Design Issues: This layer is designed principally to store the forest growth stage data interpreted from the API components of the Gippsland, Midlands-Otways, Portland Wimmera, Goldfields, North East, Central Highlands and East Gippsland Old-Growth Forest projects. The layer design accommodates both individual forest growth stage values and the amalgamated values required to delineate forest growth stage classes. Future Design Issues: The forest growth stage layer will need to be updated with annual harvesting information to ensure currency. The coding system used in the Gippsland, Midlands-Otways, Portland Wimmera, Goldfields and North East studies reflects the technique developed by the State Forest Resource Inventory, a different API technique to that used in East Gippsland and Central Highlands. Related Documents: None "A study of the Old-Growth Forests of East Gippsland", Woodgate et.al. 1994 "Study of Old Growth Forest in Victorias Central Highlands", Forests Service Technical Report 96-3. "Stand Class Definitions and Polygon Labelling Guidelines for the State Forest Resource Inventory". Peter Elliot, Department of Conservation and Natural Resources 1996 "Study of Old-growth Forest in Victoria's North-East", forest Service technical report 98-1. "Old-growth Forest study of Gippsland Victora - Modelling of Old-growth Forrest Status". Study Report. Stephen Farrel & Milos Pelikan (Unpublished Report), 1999. "Old-growth Forrest Study of South - Western Victoria: Portland Wimmera and Otways- Midlands - Modelling of Old-growth Forest status", Study Report. Stephen Farrell and Milos Pelikan (Unpublished Report), 1999.
- Status
- Completed
Temporal
Spatial
- Horizontal Accuracy
- 25m
- Code
- 4283
Maintenance
- Maintenance and update frequency
- Not planned
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: State Forest Resource Inventory (SFRI) project (North East), Gippsland, Midlands-Otways, Portland Wimmera - 1:20,000 photography. Bendigo Forest Mapping project (Goldfields) - 1:25,000 and 1:20,000 photography. Central Highlands Old Growth Forest Study - 1:25,000 and 1:40,000 photography. East Gippsland Old Growth Forest Study - 1:40,000 photography. Dataset Originality: Primary
- Description
- Collection Method: Aerial Photo Interpretation
- Description
- Conversion tables were used to create forest growth stage classes from SFRI codes. Conversion tables were also used to standardise Central Highlands and East Gippsland growth stage codes to the new format.
Metadata Constraints
- Classification
- Unclassified
Quality
Attribute Quality
- Comments
- No attribute accuracy assessment has been undertaken, however based on attribute checking procedures: 1. Polygons GT 1ha: an error of 1 in 50 (approximately 98% accuracy) 2. Polygons LT 1ha: an error of 1 in 20 (approximately 95% accuracy)
Positional Accuracy
- Comments
- Precision: 10m to 100m Determination: Forest growth stages are registered to 1:25,000 and 1:100,000 base maps from aerial photography ranging in contact scales from 1:20,000 to 1:40,000. Positional accuracy is based on drafting pen thickness, base map accuracy and the nature of the boundaries mapped. Map errors of 0.5 to 3mm are reasonable (ie 12.5m to 300m).
Conceptual Consistency
- Comments
- The growthstage code is made up of three components, a senescent growth form, a mature growth form and a regrowth form. The growthstage code is determined by an estimate of the relative contribution made to the crown cover by these three growth forms. Each growth form is given a relative dominance value from the following table: d Crowns occupy greater than or equal to 50% of the total eucalypt crown cover. g Crowns occupy between 30% - 49% of the total eucalypt crown cover. p Crowns occupy between 10% - 29% of the total eucalypt crown cover. t Crowns occupy between 1% - 9% of the total eucalypt crown cover. n Crowns occupy less than 1% of the total eucalypt crown cover. This approach provides a very large number of possible combinations of which only a subset are logically consistent. These have all been verified. For a complete description of growth stage and maplabels refer to Stand Class Definitions and Polygon Labelling Guidelines for the State Forest Resource Inventory, Peter Elliot Department of Conservation and Natural Resources 1996.
Missing Data
- Comments
- The dataset is complete for the extent of the East Gippsland, North East, Central Highlands and Goldfields Old Growth Forest Study areas. The dataset is complete for the extent of the east Gippsland, North East, Gippsland, Midlands-Otways, Portland Wimmera, central HighLands and GoldfieldsOld Growth Forest Study areas.
Excess Data
Acquisition Info
Raster Data Details
Point Cloud Data Details
Contour Data Details
Survey Details
Overviews
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0b59a011-05df-55fb-bd9c-54be72b5be2c
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Associated resources
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