Coastal features

dataset: SHORE25
This layer contains coastal and marine related features represented by points and lines. All features are identified and coded according to the Australian Standard Geographic Information Systems - Geographic Data - Interchange of feature-coded digital mapping data AS2482-1989. Data has been derived from Land Victorias State Digital Map Base - Topographic data and converted from Microstation .DGN format to Arcinfo format. NB: This layer is obsolete. For maintained data please refer to Vicmap.
 
Citation proposal Citation proposal
(2006)

Coastal features

Department of Transport and Planning
 

Description

Title
Coastal features 
Alternate title
SHORE25 
Resource Type
Dataset  
Purpose
Shore25 is a key layer at 1:25,000 for departmental operational activities that require coastal and related line, point and annotation features. 
Credit
Phill King, Sandro Condurso 
Supplemental Information
History: Data has been derived from Land Victorias State Digital Map Base Topographic (SDMB-T) and converted from Microstation DGN format to Arcinfo format. All features have been AS2482 coded including annotation. This cover has annotation at 1:25,000 which may be used at alternative scales of up to 1:50,000, given the nature in which annotation has been justified. Relationship to other Datasets: This layer forms part of the 13 derived layers used to represent the State Digital Map Base-Topographic (SDMB-T). When all 13 layers are combined, the resulting information provides all the topographic detail as represented by a published 1:25,000 map. Current Design Issues: The layer has been defined to allow for differentiation of coastal features according to the Australian Standard AS2482 - 1989. The layer consists of lines and points representing coastline and related features and does not have polygon topology. Annotation present for this layer is in the subclass SHORE25 and is AS2482 coded for features they describe. Future Design Issues: Subject to proposed draft Australian / NZ Standard DR97068 geographic information - data dictionary. . Related Documents: None Natural Resources & Environments 1:25,000 Topographical Base Datasets - Phill King - NRS (May 1997) SDMB-T in the Corporate Geospatial Library - Phill King, Sandro Condurso - NRS (1998) 
Status
Obsolete  
 
 

Temporal

Time period
1970-01-01 
 
 

Spatial

Spatial representation type
Vector  
Horizontal Accuracy
25m  
Description
General - Victoria 
N
S
E
W


 

 

Maintenance

Maintenance and update frequency
As needed  
 
 

Format

Title
DIGITAL Arc/Info Revision 7 Librarian layer 1 
 
 

Contacts

  Point of contact

Cited responsible party  

No information provided.

Cited responsible party  

No information provided.

Cited responsible party  

No information provided.

Cited responsible party  

No information provided.
 
 

Keywords

Topic category
  • Oceans
 
 

Resource Constraints

Classification
Unclassified  
 
 

Lineage

Statement
Dataset Source: Land Victoria 1:25,000 State Digital Map Base - Topographic Dataset Originality: Primary 
Description
Collection Method: Maps 
Description
The data was received in an Arcinfo format in a single file containing all features as described on a published 1:25,000 map, including annotation and symbology defined as arcs. Prior to insertion in the library the data underwent the following processes: Line features separated into individual covers based on AS2482 Line covers then unsplit on AS2482 Line, point and annotation then sorted into appropriate layers 
 
 

Metadata Constraints

Classification
Unclassified  
 
 

Quality

Attribute Quality
Comments
Coding on all features has been validated by Land Victoria during the creation of the State Digital Map Base - Topographic from scanned repromats of published 1:25,000 maps. "The allowable error in attribute accuracy ranges between a 1% allowable error to 5% error. For this product attribute accuracy ranges between a 1% to 5% error. For this product attribute accuracy is a measure of the degree to which features and attribute values of spatial objects agree with the information on the source material." (Geospatial Information SDMB-T Metadata 1998) 
Positional Accuracy
Comments
"The planimetric accuracy attainable will be the sum of errors from three sources: · the positional accuracy of the source material · errors due to the conversion process · errors due to the manipulation process" (Geospatial Information SDMB-T Metadata 1998) Precision: Source Data: 1:25 000 topographic maps Horizontal accuracy - 90% of well defined points will fall within +/- 12.5m of true position Vertical accuracy - 90% of elevations will fall within +/- 0.5 a contour interval which are at 10 or 20 metres Digital Data: Any departure between the digital and source material (measured between centrelines) will not exceed 0.5mm at map scale (i.e. 12.5m at 1:25,000) with a root mean square of 0.12mm for any random sample. Exceptions: There are 38 mapsheets that are sub-standard due to survey control problems and small scale photography. There is up to 50 metre error in some features. These will be recompiled when the remainder of the data capture progam is complete. For a list of these mapsheets and their status please contact Natural Resource Systems Branch - Mapping. Determination: Survey controlled with 8 points per mapsheet with a residual error less than 10m at ground scale 
Conceptual Consistency
Comments
All coverages go through a checking procedure that includes: item validation (sourced, sourcea, and version) "The allowable error in attribute accuracy ranges between 1% to 5% error. Logical consistency is a measure of the degree to which data complies with the technical specification. The test procedures are a mixture of scripts, microstation MGE program and on-screen visual checks." (Geospatial Information SDMB-T Metadata 1998) 
Missing Data
Comments
All of the State is covered by data in the DNRE CorporateGeospatial Data Library with the exception of information currently held by NSW Land Information Centre as per the cross border agreement 1997. "The completeness of the data is tested by visual comparison to the source material. This test may be either on-screen visual checks or overlay symbolised plots compared to the source material. The SDMB-T is still being produced to complete capture stage that will reflect the information levels contained on a printed 1:25 000 topographic map. At present there is a number of different capture data sets. · freeways, highways, roads, and tracks · rivers, creeks and hydrographic features · contours at 10 and 20 metre intervals · railway lines The data set produced by digital stereo capture covering 20% of the State contains all levels of information except for text and information relating to administrative boundaries. Other data sets have varying degrees of data capture beyond the mandatory requirements. The remaining data set required to complete the data capture over the whole of the State is currently being captured by private contractors." (Geospatial Information SDMB-T Metadata 1998) All of the State is covered by data in the DNRE CorporateGeospatial Data Library with the exception of information currently held by NSW Land Information Centre as per the cross border agreement 1997. "The completeness of the data is tested by visual comparison to the source material. This test may be either on-screen visual checks or overlay symbolised plots compared to the source material. The SDMB-T is still being produced to complete capture stage that will reflect the information levels contained on a printed 1:25 000 topographic map. At present there is a number of different capture data sets. · freeways, highways, roads, and tracks · rivers, creeks and hydrographic features · contours at 10 and 20 metre intervals · railway lines The data set produced by digital stereo capture covering 20% of the State contains all levels of information except for text and information relating to administrative boundaries. Other data sets have varying degrees of data capture beyond the mandatory requirements. The remaining data set required to complete the data capture over the whole of the State is currently being captured by private contractors." (Geospatial Information SDMB-T Metadata 1998) 
Excess Data
 
 

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