This table will hold polygons depicting indicative extents of the area of the hydro feature. Each of these features has some type of non specific but best derived boundary. These geographic hydro areas depict features such as bays, beach, bend, entrance, inlet, passage, reach and seas. The polygons contain intelligent information including name, feature type and a Scale Use Code to enable labelling which is both multi scale and non scale dependent.

This table will hold polygons depicting indicative extents of the area of the hydro feature. Each of these features has some type of non specific but best derived boundary. These geographic hydro areas depict features such as bays, beach, bend, entrance, inlet, passage, reach and seas. The polygons contain intelligent information including name, feature type and a Scale Use Code to enable labelling which is both multi scale and non scale dependent.

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.

Not valid due to fuzzy nature of polygons

90%

Due to the nature of the data, this data set may contain:

overlapping polygons
intersecting linework
polygons with no labels

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

                            
                              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