Title

Tree Cover simplified for display at scales between 1:150,000 and 1:500,000 

Alternate title

TREE100_BASIC 

Purpose

This dataset is designed purely for the display of general tree cover at scales between 1:150,000 and 1:500,000 on map products and internet mapping sites. 

Supplemental Information

Related Documents: None 

Status

Completed  

Code

4283 

Maintenance and update frequency

Not planned  

Topic category

• Biota

Use limitation

General 

Classification

Unclassified  

Statement

Dataset Source: Derived from the TREE100 dataset. Dataset Originality: Derived 

Description

Derivation of this dataset uses 50 ha as the minimum polygon size and 100 m as the generalize weed tolerance. Processing details are defined in the Arc/Info aml tree100_simple.aml as follows: drop source cover items that may prevent dissolve working properly remove undersize tree cover polygons in source cover populate undersize hole polygons with a present value dissolve out undersize holes generalize remaining features populate undersize hole polygons created by the generalize with a present value populate large orphan tree cover polygons created by the generalize with a present value dissolve out undersize holes remove any remaining undersize tree cover polygons created by the generalize dissolve out any undersize holes within holes remove any label points in the world poly populate large orphan tree polygons created by the generalize with a present value 

Classification

Unclassified  

Attribute Quality

Comments

As per TREE100. 

Positional Accuracy

Comments

Less than 500 m 

Conceptual Consistency

Comments

Areas less than 500,000 sqm that formed holes in the tree cover have been coded 'P' (present) and then dissolved out. 

Missing Data

Comments

Coverage is topologically valid and complete for the State of Victoria. 

Excess Data

Comments

As per TREE100