Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0803008626 

Victorian Spatial Data Library (VSDL) Schema

VMHYDRO:HY_WATER_AREA_FUZZY 

Jurisdiction

Victoria 

Topic category

• Inland waters

Resource Constraints

Use limitation

. To be used for labelling only. Not to be used for GIS analaysis, spatial modelling or area statements 

Classification

Unclassified  

Creative Commons Attribution 4.0 (CC-BY)

• 
• License Text

Other Dataset Details

Date ( Revision )

2020-02-21

Date ( Publication )

2024-11-29T17:45:15

Status

Completed  

Purpose

The HY_WATER_AREA_FUZZY table holds the more indicative natural Hydrographic features within Vicmap Hydro. Vicmap Hydro provides an accurate representation of natural and man made Hydrographic features across Victoria, at a capture scale of 1:25,000. It is used in a variety of applications, particularly in emergency services, natural resource management, planning and development, and digital map publication. 

Credit

Project Instigator: George Mifsud Data Capture: Lisa Cheong Data updates: Samuel Hislop, Kathryn Germain, Richard Stewart 

Supplemental Information

Related Documents: None Please see Vicmap Features of Interest product description for more detailed information on this product. This can be found on the Vicmap Features of Interest webpage. http://www.delwp.vic.gov.au/vicmap > Vicmap Products > Vicmap Features of Interest http://www.delwp.vic.gov.au/vicmap 

Maintenance and update frequency

As needed  

Maintenance date ( Publication )

2023-02-24T22:10:20

Spatial

Spatial representation type

Vector  

Reference system identifier

4283

Temporal

Begin date

2019-11-27 

End date

now  

Resolution

Horizontal Accuracy

25m  

Quality

Conceptual Consistency

Due to the nature of the data, this data set may contain: overlapping polygons intersecting linework polygons with no labels 

Missing Data

State Wide Completeness Verification: State wide QA process 

Excess Data

80% classification accuracy 

Attribute Quality

90% 

Positional Accuracy

Not valid due to fuzzy nature of polygons 

Lineage

Description

Hydrographic areas were identified on compilation maps displaying SHORE25 annotation. Individual polygons were then screen digitized for each appropriate annotated feature. The name, feature type code, land type and level properties were populated for each new polygon. The boundary was determined by the coastline on the landward side and a concave arc out to sea on the seaward side intersecting with the coast at a logical point, usually at the tip of a headland. For mapping and display purposes each polygon would be labelled with the name of the feature. The boundary line would not shown. 

Statement

Dataset Source: Geographic Areas Hydro Label is sourced from the original published 1:25 000 topographic maps sheets produced from 1975 to 1995. An additional source was the Geographic names Register. As part of the conversion to digital data process in the 1990s, each 1:25 000 map sheet was scanned. The relief and hydrographic area map textual information was incorporated as annotation as part of the SDMB-T (State Digital Map Base - Topographic) layers MORPTH25 and SHORE25 respectively. Note that this information was created specifically for use at 1:25 000 and was dependent on the 1:25 000 index system There is no Vicmap dataset that contains spatial information depicting geographic areas. So to display this information for Vicmap Topographic purposes the SDMB_T annotation layers were used. This posed some limitations in its use. For instance the annotation for the text 'PORT PHILLIP BAY" was created over the extent of the feature for every single format 1:25 000 map where the feature occurred. Hence over a Vicmap Topographic 1:25 000 mapsheet, which is two single format sheets side by side, this textual information would potentially be displayed twice. This same annotation may be truncated on the edges of Vicmap Topographic 1:30 000 A4 map sheets (see fig 1.) On the Vicmap Topographic 1:50 000 map sheets the annotation may not be readable due to its reduced size, and may appear several times in the map area. Dataset Originality: Primary & Derived 

Attributes

Column Name	Obligation	Unique	Data Type	Data Length	Data Precision	Data Scale	Reference Table Owner	Reference Table Name	Reference Table Code Column Name	Short Column Name	Definition
VICNAMES_STATUS_CODE	O	N	VARCHAR2	2						VICNMSTATC
CREATE_DATE_PFI	O	N	DATE	7						CRDATE_PFI
AUTH_ORG_ID	O	N	VARCHAR2	30						AUTHORGID
STATE	O	N	VARCHAR2	3						STATE
FEATURE_TYPE	O	N	VARCHAR2	30						FTYPE
SUPERCEDED_PFI	O	N	NUMBER	22	9	0				SUPER_PFI
PARENT_NAME	O	N	VARCHAR2	100						PARENTNAME
AUTH_ORG_VERIFIED	O	N	DATE	7						AUTHORGVER
AUTH_ORG_CODE	O	N	VARCHAR2	4						AUTHORGC
SCALE_USE_CODE	O	N	VARCHAR2	1						SCALE_USEC
PFI	O	N	NUMBER	22	9	0				PFI
PARENT_FEATURE_ID	O	N	NUMBER	22	9	0				PARENTFTID
VICNAMES_ID	O	N	NUMBER	22	9	0				VICNAMESID
NAME	O	N	VARCHAR2	100						NAME
NAME_LABEL	O	N	VARCHAR2	100						NAME_LABEL
FEATURE_SUBTYPE	O	N	VARCHAR2	30						FEATSUBTYP
CREATE_DATE_UFI	O	N	DATE	7						CRDATE_UFI
FEATURE_ID	O	N	NUMBER	22	9	0				FEATURE_ID
UFI	O	N	NUMBER	22	9	0				UFI

About the Metadata Record

Metadata identifier

urn:uuid / 024e7667-da5b-5b86-a334-6bb31f0cd1ef