the Cocos (Keeling) Islands GIS online |
||||||||
| Home | Interactive maps | Documents | Help | |||||
| Dataset | |
| Title | Vegetation |
| Custodian | Geoscience Australia |
| Jurisdiction | Australia |
| Description | |
| Abstract |
This dataset is a polygon theme of vegetation types or structures of the Cocos (Keeling) Islands. It is derived from topography data (possibly 1:1000 scale) created by AUSLIG. The attributes are probably meaningless. Re-coding according to actual vegetation types is recommended if this layer is to be used for analysis. The vegetation appears to match the 1987 orthophotography, and would therefore be out of date in some areas (the 1992 planning data documentation reveals that areas have been cleared since the 1987 air photos). Coverage is over West and Home Islands. |
| Search Word(s) | ECOLOGY Ecosystem HERITAGE Natural |
| Geographic Extent Name(s) | Cocos (Keeling) Islands |
| Data Currency | |
| Beginning Date | not known |
| Ending Date | not known |
| Dataset Status | |
| Progress | Complete |
| Maintenance and Update Frequency | not known |
| Access | |
| Stored Data Format | DIGITAL - ESRI Shapefile, ArcInfo Coverage |
| Available Format Type | DIGITAL - ESRI Shapefile |
| Access Constraint | See contact details below |
| Data Quality | |
| Lineage |
The vegetation theme was derived by AGSO from the topography data supplied by AUSLIG Canberra (via Landinfo). There are a number of features in the original topography data that do not have valid AUSLIG codes. Comparison with the orthophotography indicates that all these codes represent vegetation. GA has extracted these codes and created a polygon layer (in ArcInfo 8.1 Workstation) by including common lines as well as those coded as a particular type. The resulting layer is coded according to the erroneous codes in the original data. Because the level of detail is different from the vegetation layers in the planning data, correlation was not conclusive. Re-coding according to actual vegetation types is recommended if this layer is to be used for analysis. In December 2003, the vegetation data was projected to UTM(WGS84) Zone 47S for addition to the 2003 Cocos Islands GIS. |
| Positional Accuracy |
The positional accuracy of this dataset is the same as the topography dataset that it was extracted from (its nominal scale is probably 1:1000). The vegetation appears to match the 1987 orthophotography, and would therefore be out of date in some areas (the 1992 planning data documentation reveals that areas have been cleared since the 1987 air photos) |
| Attribute Accuracy |
Attributes are probably meaningless, as original codes were not according to the AUSLIG standards and no decoding sheet was available. Correlation with other vegetation coverages was not possible due to scale differences. Recoding according to actual vegetation types is recommended if this layer is to be used for analysis. |
| Logical Consistency | All themes are concerned with the vegetation on Cocos Islands. |
| Completeness | Appears complete for specified scale and extent. |
| Metadata Date | 19-01-2004 |
| Contact Information | |
| Contact Organisation | Attorney General's Office |
| Contact Position | Territories |
| Mail Address | GPO Box 594, Canberra, A.C.T 2601 |
| Locality | 111 Alinga St, Canberra |
| State | ACT |
| Country | Australia |
| Postcode | 2601 |
| Telephone | (02) 6274 6124 |
| Facsimile | (02) 6274 8040 |
| Electronic Mail Address | sean.hambrook@ag.gov.au |
| Additional Metadata | |
| Projection | UTM (WGS84) Zone 47S |