Yes, the size of an enquiry is limited for each specific drawing tool as follows:
Line – 5km
Area – 1kmsq
Circle – 25m to 1km (Diameter)
When you perform a search the map will be automatically positioned with a circle at the centre of your map. If this covers the area you require information for, then you can continue to the next step. If you prefer to draw your site on the map, then you have three drawing tools available:
1) Line – the Line tool allows you to draw a line to represent your activity
2) Area (Polygon) – this tool is used to draw the outline of an area
3) Circle – at the centre of your site, lick and drag outwards. This will result in a circle being drawn to cover your site.
Important: when using the drawing tools, left click to change direction; to complete the drawing, left double click.