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NATMAP Raster product pages

Updated: 09 December 2003

VIEWING MAPS USING THE NATMAP RASTER VIEWER

OTHER MAP WINDOWS

All map windows described here can be turned on and off using the Map Window control buttons.

	Locator and Magnifier Overlay Windows The Locator and Magnifier windows provide a convenient indication of the location of the current map in relation to Australia, and the region surrounding the current location. The Locator window displays a map of Australia, with a blue cross hair marking the centre point of the current location of the viewed map. The Magnifier window displays a magnified view of the current location. These windows can be repositioned simply by holding the left mouse button down over the window's title bar and dragging the window to a new position by moving the mouse, then releasing the mouse button. The windows can be closed by either clicking the X in the top right corner of the window; or by clicking on the Show Locator button to close the locator, on the Show Magnifier button to close the magnifier, or on the Show Info button to close the Map Information window. Clicking on the maps within the Magnifier and Locator windows causes the map that matches the clicked point's location to be loaded in the main map view. In this way the magnifier and locator may be used to search and load a map. Note that the magnifier and locator maps cannot be panned or zoomed.
	Map Information Window The Map Information window lists the map name, NATMAP map number and datum; the spheroidal distances in the N-S and E-W directions on the part of the map displayed on screen (in kilometres); and the top left and bottom right coordinates (lat/long and easting/northing) of the part of the map displayed on screen. Changing the zoom level will affect the spheroidal distances and the coordinate values shown in the Map Information window. Note on distance measurement In the 2003 release, there is no separate distance measuring tool. It may be included in future releases. You can use the distances in the Map Information window as a start, and there are distance measuring tools in many other freely available and commercial GIS, CAD, graphics and GPS products that will read NATMAP Raster map images.
Note: It is possible for these three windows to be dragged entirely off the screen. If this happens, simply press the Show button twice. This will reposition the matching window so that it is partially visible on the right side of the screen.
	The Legend Window The Legend window shows the legend for the map series currently being displayed. For 1:250,000 scale map images, there is also an option to view an expanded legend which explains the definition of features and the criteria used to determine whether a feature should be shown on the map.
	The Show Climate graph Window The Show Climate graph window shows the climate graph for the map currently being displayed. It uses the climate graph that would normally appear in the marginalia of the 1:250,000 scale NATMAP. There will be either one or two Climate Graphs appearing in the popup window depending on the geographic location of the sheet. Those maps representing areas subject to different regional climatic variations will have two graphs. The bottom of the graph is divided into squares representing each month. Temperature is measured along the left axis, and rainfall on the right. The average maximum and minimum temperatures for each month are shown as two curved lines separated by a red band. Average rainfall is represented by a single blue line. Climate graphs will only be displayed for 250K Maps, 250K Mosaic and the Satellite Mosaic layers. Some 1:250,000 scale maps do not have climate graphs available as at time of release - if you select a climate graph for one of these maps, the following graph will appear in the Show Climate window: Please note that there is a minor bug in this function - a workaround is now available..

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