Help for Canadian Geochemical Surveys

The initial map displays polygons which outline all of the surveys in the catalogue.

You can reduce the number of polygons displayed by entering search parameters in the text boxes on the left of the window.  After you click the submit button, the map will be redrawn with only those surveys that match your search criteria.  The search parameters are explained in more detail below.

You can control the map display and obtain information about any of the surveys by using the five buttons at the top of the map.  The function of each button is described in the table below.  When a button is active, it will be displayed with a grey background.

Map Tools

		Zoom in to a location.  If you simply click on the mouse, the map will zoom in by a fixed amount.  If you hold the mouse button down, and then move the mouse, you can select a rectangle to zoom in to.
		Zoom out from a location.  Simply click on the mouse.  The map will zoom out by a fixed amount, centred on where you clicked the mouse.
		Return to the initial map extent.
		Recentre the map at the location where you clicked the mouse.
		Request information about the survey(s) at a particular location.  The map will be redrawn, with the selected survey(s) highlighted in red, and a table underneath the map will give summary information about the survey(s), with hyperlinks to more detailed information.

Search parameters