National Wilderness Inventory

Australia: Our national stories
Australian Heritage Commission, 2003
ISBN 0 642 23561 9

4. Creating The Wilderness Database (continued)

4.5 Wilderness Database Structure

All wilderness analyses, and the resulting wilderness database lattices, are carried out and stored in the Universal Transverse Mercator projection.

This projection is used so that the results of analysis may be immediately related to standard Australian topographical maps sheets which are produced in the same projection. The disadvantage of maintaining the database in this projection is that it is not possible, without re-projection, to combine all survey units together to produce a single representation across Australia.

Projection Universal Transverse Mercator
Units metres
Spheroid Australian
UTM Zones 49 through to 56

The standard wilderness database attributes are described in Table 4.9. These attributes are stored within the PAT INFO file associated with each lattice. The attributes that are specifically concerned with calculating 'arid' Biophysical Naturalness values are stored separately in a BIO INFO file associated with each lattice (equivalent in structure to the PAT INFO file).

The BIO INFO attributes are presented in Table 4.10. Each attribute in the wilderness database is associated with a particular stage in the analysis process (as shown in Figure 4.5). The first set of attributes relate to the first stage, the calculation of raw distances. The names of these attributes relate directly to each of the grouped feature coverages outlined in Table 4.1.

The second set of attributes, relating to the second stage, contain distances to the minimum high grade equivalent (mHGE) features. The third set of attributes are the wilderness indicators, derived from the standardisation of the mHGE values. The Biophysical Naturalness attribute (biophysical), although a special case, is included here as a wilderness indicator. Wilderness, the wilderness quality attribute, is the final attribute of the wilderness database.

Table 4.9: Standard Wilderness Database Attributes ('lattice'.PAT)
Item name Description
Values
ACC1
ACC2
ACC3
ACC4
AES1LN
AES2LN
AES3LN
SET1
SET2
SET3
SET4
AES1PT
AES2PT
AES3PT
ACC2PT
BUILTUP
CULTURAL
Distances
Raw distances to the nearest feature in each grouped feature coverage. Assignment of each item to indicator grades is outlined in Table 4.1.
 
Units: metres
Range: 0 - 30000m
Min Accuracy: 100m
NB: Features not found within a radius of 30km are assigned a distance of 30km
ACCESS
AESTHETIC
SETTLEMENT
Minimum Weighted Distance
Distance to the nearest high grade equivalent feature for each of the distance-based indicators.
 
Units: metres
Range: 0 - 30000m
Min Accuracy: 100m
ACCESS-CLS
AESTHETIC-CLS
SETTLEMENT-CLS
BIOPHYSICAL*
Indicators
mHGE distances classified to standard class ranges. Note Biophysical is a special case.
 
Units: class units
Range: 0 - 5 (> 5 possible for distance-based )
WILDERNESS Wilderness Quality
Summation of the four indicator values.
Units: class units
Range: 0 - 20 (> 20 possible although not used)
* The method of assignment for the Biophysical Naturalness value depends on whether the 'arid' or 'non-arid' Biophysical Naturalness assessment procedure is used.
Table 4.10: Standard Database Attributes for 'Arid' Biophysical Naturalness ('lattice'.BIO)
Item name Description Values
PERM-PL
PERM-LN
PERM-PT
Distances
Raw distances to the nearest feature in each grouped feature coverage. Assignment to 'arid' Biophysical Naturalness is outlined in Section 4.3.1.
Units: metres
Range: 0 - 30000m
Min Accuracy: 100m
RANGE
STOCK

Range type and tenure descriptors as outlined in Table 4.7. Units: 3 descriptors
BIOPHYSICAL Indicator
Biophysical indicator value.
Units: class units
Range: 0 - 5