Background Options
On the initial drawing of a
map this display box shows the words ‘Set Background’. The ACT Locate
application provides the user with the option of selecting a background image.
This will always display under all other data layers, however in drawing a map
it may display after the other layers.
If the user selects the
drop down arrow to the right of the text, the various background options will be
displayed and the user can select the desired one.
The
user can select an image background or choose ‘None’.
Upon selection of a
background the map will redraw automatically using the same extent and data
layers as before.
NOTE:
IF THE PREVIOUS MAP VIEW INCLUDED DATA LAYERS WITH SOLID FILL SYMBOLS, THE
BACKGROUND IMAGE WILL NOT BE VISIBLE. THE USER MUST FIRST TURN THE MAP DISPLAY
OF THESE LAYERS OFF (FROM THE LAYER LIST VIEW) AND CLICK ON THE REDRAW MAP
BUTTON.
The map layers have been
included in the Layer List to enable the user to easily switch off the display
of most of the default solid fill data layers, as they are included in the
‘ACT BASE’ Group. The user can click on the Group box to uncheck this, click
on the REDRAW MAP button and then select the desired background image.
As the various image
backgrounds available through ACT Locate are like other geographic data sets,
each has a metadata entry in the ACT Geographic Data Directory. The
tag
next to the selected image will present the user with a separate Metadata
Page for the relevant background image. Further details on the Metadata Page
in ACT Locate are availablehere.
Refresh Map Button
Whenever a user makes a
change to the Layer List they must click on the ‘Refresh Map’ button for
these changes to be reflected in the map.
GDA Logo
All data available through
the ACT Locate application is based on the Geocentric Datum of Australia (GDA)
1994. This logo has been issued to the Department of Urban Services under
license from Geoscience Australia and is used in this application to signify
that the data displayed is GDA compatible.
Active Tool text
Below the ‘Refresh Map’
button there is an area to assist the user in knowing which is the currently
active map tool. In this case it is the Identify tool.
Projection and
Coordinates
The projection and
coordinates of the current cursor location are displayed in the lower left hand
corner of browser border. For ACT Locate the project is always Map Grid
Australia 1994 (MGA94) which is the UTM projection for the GDA94 datum.