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Open the TDDP using the link https://portal.tern.org.au.
You can select Map based search bar to search TERN data using map, this map search will provide options to select data by drawing region, a polygon on the map, search using Longitude & Latitude.
Selecting the Map Search will display the page as;
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Select theicon below from the map view to draw a polygon on the map.
Single click will highlight an area on the map, drag the cursor to your desired area on the map, double click will end the drawing.
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Hit 'Go' button to search the polygon you selected on the map, the data search result should display like below;
Access the data by selecting the title of the data search result.
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To clear the selection from the map, select 
select the button below and it will clear the region on the map.
