While the TNTatlas Client GIS software is downloading please take a moment to read this quick guide so that you can get the most out of the data and the features supported by the software. A guide to all the features of the software can be found below.

The GIS software runs separately to your browser, and, once it has finished downloading it will start itself. As the data that it displays is of a high volume this is not sent to you via the Internet. Instead only the portion of data currently in your display is sent at any time. Consequently each time you want to make a change to the data viewed (zoom, pan, change data layers displayed etc.) this request must be sent to the host computer and then the new data sent to you. You may therefore need to click the button to initiate your changes (pan and some zoom types exempt). There may be a delay of around 30 seconds between your request for a change and the change occurring.

Basic operation

 
On-screen instructions

Click to toggle the on-screen instructions on and off.

 Pan

Click to scroll the view in the specified direction. When the icon is grey the edge of the data has been reached. No further scrolling in this direction is possible.

Zoom 

Provides a menu with a variety of zoom choices.

Zoom Box

The left mouse button is used to reposition and resize the elastic box that appears when you choose this mode. When the four-point arrow cursor is active, holding the left mouse button and dragging repositions the Zoom Box. The two-headed arrow shapes indicate side or corner resizing is active when you click and drag. When you are satisfied with the size and position of the box, click the right mouse button.

Show/Hide checkbox

Clicking on the Show / Hide checkbox toggles display of a layer or group on and off. Once you have made your choices hit the submit button to have the software display your new choices.

Print image

Prints the current contents of the atlas image area. Unless you have enabled printing for other Java applets, you are likely to encounter the browser message "Security manager disables printing" the first time you click on the Print Image icon. See the text on Print below on how to enable printing.

Advanced operation