National Wilderness Inventory

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

3. The Primary Database (continued)

3.4 Feature Codes and Grades

This section details the full set of NWI assigned feature codes used in assembling line, point and polygon features for the primary database.

All geographic features included in the primary database are coded for identification purposes. The codes generally reflect co-operating agency requirements and have thus developed progressively during the course of baseline survey work.

Where practicable, features have been distinguished with the most specific code, although full use of the code set is not required for wilderness analysis. In many cases features are grouped together under summary codes indicating the feature¼s appropriate grade for wilderness analysis.

This section also details the assignment of features to grouped primary data sets required in order to run the wilderness analysis.

Table 3.3: The Land_cov Coverage Feature Codes
Descriptor Description NWI Code (Cover)
Natural cover a natural water body or an area of land which retains its natural cover. Where this cover is vegetated, the original structure and taxonomic composition of the native vegetation communities should be essentially intact. 1
Cultural cover
(excluding built-up)
a water body or an area of land which is essentially an artifact of modern technological society. Where this cover is vegetated, the original structure and taxonomic composition of the native vegetation communities is no longer intact. 2
Ocean marine and estuarine area 3
Swamp (sub-set of natural cover) 4
Salt lake (sub-set of natural cover) 5
Built-up area urban or suburban area 6
Dune; naturally bare area (sub-set of natural cover) 7
Pine forest (sub-set of natural cover) 8
Additional vegetation natural cover: applies only to South Australian agricultural areas (sub-set of natural cover) 9
Degraded vegetation regrowth scrub/drained areas: applies only to South Australian agricultural areas (sub-set of natural cover) 10
Lake an essentially natural inland water-body (sub-set of natural cover) 11
Reservoir an artificial inland water-body (sub-set of cultural cover) 12
Excluded from survey 99
Note: Bold feature codes indicate minimum code set required for wilderness analysis
Table 3.4: The Lines Coverage Feature Codes
Description NWI Code (Access)
High grade access (summary code)
2 or more lanes, sealed road
1 lane, sealed road
2 or more lanes, unsealed road
110
111
112
113
Medium grade access (summary code)
1 lane, unsealed road
Landing ground, airstrip
Operating railway
120
121
122
123
Low grade access (summary code)
Vehicular track
130
131
Very low grade access (summary code)
Walking track
Cleared line
Established vehicle access route (non-constructed)
140
141
142
143
Other features
Closed road
Disused railway
Pipeline
Powerline
Fence
Levee bank
Quarry
Drain
Disused airfield
Dams/banks
 
210
220
230
240
250
260
270
280
290
22006
Natural features (arid areas)
Water lines (rivers, streams, etc.)
Native soakage
Waterholes
Spring/pond
River/creek
Lake
 
31000
31004
31005
31006
31008
31009
Miscellaneous features
State border
Unknown
 
300
999
Table 3.5: The Points Coverage Features Code
Description NWI Code (Sites)
Cleared point (summary code)
Open area ( Quarry ( Mine ( Abandoned mines or quarries
10000
10100
10200
10300
10400
Occupied buildings (summary code)
Residential
Service location, population Service location, population > 10 & Service location, population > 100
21100
21101
21102
21103
21104
Unoccupied buildings
Ruin
Lighthouse
Miscellaneous building
Utilities
 
21201
21202
21203
21204
Other structures
Beacon
Pump
Bore
Well
Tank
Dam/Bank
Windmill
Abandoned well, bore etc.
Reservoir
Unlabelled square water point (topo map)
Yard
Trig point
Unlabelled round water point (topo map)
Tower (e.g. telecommunications)
 
22001
22002
22003
22004
22005
22006
22007
22008
22009
22010
22011
22012
22013
22014
Natural features (arid areas)
Native water point
Native wells
Native rockholes
Native dam
Native soakage
Waterhole
Spring/pond
Unlabelled round water point (topo map)
Lake
Natural unnamed water point
 
31000
31001
31002
31003
31004
31005
31006
31007
31009
31010
Table 3.6: Grouped Primary Data Sets
Primary Database Layer Layer Item Grouped NWI Feature Codes Grouped Coverage
Land_cov Cover 2, 6, 8, 12
6
CULTURAL
BUILTUP
Lines Access 110, 111, 112, 113
120, 121, 122, 123
130, 131
140, 141, 142, 143
 
230, 240
250, 260, 270, 280, 290, 22006
210, 220
ACC1
ACC2
ACC3
ACC4
 
AES1LN
AES2LN
AES3LN
Points Sites 122
 
21104
21103
21102
21101
 
21200, 21202, 21203, 21204,
22001, 22009, 22014
10100, 10200, 10300, 10400,
22000, 22002, 22003, 22004,
22005, 22006, 22007, 22010,
22011, 22013
22008, 22012
 
21101, 21102, 21103, 21104,
22003, 22004, 22005, 22006,
22007,22009, 22013,31000,
31004, 31005, 31010
ACC2PT
 
SET1
SET2
SET3
SET4
 
AES1PT
 
AES2PT
 
 
 
AES3PT
 
PERM-PT