ACT Geographic Data Directory
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Note: This dataset description is metadata (data about data) which describes the actual dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines
ANZLIC unique identifier: ANZAC0295000996
Title: Vegetation: Murrumbidgee River Corridor Vegetation
Custodian: ACT Government, Department of Urban Services, Environment ACT
Jurisdiction: Australian Capital Territory
Abstract:
The Vergetation Survey Map of the Murrumbidgee River Corridor was provided by WRM. It displays a vegetation survey by polyogons compiled by Frank Ingwerson and Alan Johnson, pubilshed by ACT Parks and Conservation in 1992.
ANZLIC search words:
Spatial domain:
Geographic extent polygon: 149.1 -35.54, 149.12 -35.54, 149.12 -35.59, 149.1 -35.59, 149.1 -35.54,
Beginning date: 1997-10-01
Ending date: Current
Progress: Complete
Maintenance and update frequency: Not Known
Access constraints:
restricted - requests require in writing
Lineage:
The Murrumbidgee River Corridor (MRC) vegetation map was provided by WRM. The vegetation survey consisted of 1 hard copy map. The map was in good condition and no further preparation appeared to be needed for automation. Due to the cost of scanning, the map was transferred to a stable drafting film for the scanning process. Additional cleaning of a scan such as the removal of text, shades and boundary lines from the base map increases the cost of the procedure. This is why the transferred sheet had only the polygon data and tic points for geo-referencing. The transfer sheet was then delivered to AGSO for scanning. The contact for the scanning procedure at AGSO was Brian Pashley. Once the scan was completed, Arc exchange files (.e00) were sent to GISTDA. The Arc Exchange files were then imported into Arc View and converted to a Shape file(.shp). The exchange files have 5 fields, Shape, Area, Perimeter, MRC_ and MRC_id. This is the standard attribute format of the .e00 file. These files can be found in G:/GIS/Projects/Vegmap/Wholproj/Scanned/fmrc/mrc_amg.shp. ` The shape files were then attributed with the existing legend information from the hard copy maps. Each polygon in the shape file was highlighted individually and attributed with the a map code. This was represented by a number or a string of letters (eg. P = E.pauciflora). The map code was used as the common Arc View field for joining the attributes of an Excel table. The Excel table is then saved as a .dbf (IV) and imported into Arc View. Once in Arc View the .dbf table is then joined to the shapefile attribute tables. The existing shape files are then converted again to produce the final theme(s) with the appropriate attributes.
Positional accuracy:
The base map was provided by Australian Survey Office with Permission from the Commonwealth Surveyor General. Shape files were produced from a 1: 10 000 map. The map was scanned and errors were corrected by hand digitising (0.004 RMSE)
Attribute accuracy:
Attributes were taken directly off the hard copy map sheets.
Logical Consistency:
All polygon contain labels, any errors from scanning were corrected using hand digitising (0.004 RMSE)
Completeness:
Complete
Metadata date: 2007-12-03
Metadata reference: http://indexgeo.net/asdd/act/ANZAC0295000996.html
This dataset description can be discovered via the Australian Spatial Data Directory (ASDD)