MODES OF OPERATION - APRS
Using Overlays in APRSIS32

Updated 21 May 2011, 0200 UTC

What are Overlays?

Overlay files allow you to show specific information about specific objects on your APRS map which are not transmitted over the air to other stations.

How to use overlay files in UI-VIEW32
How to use overlay files in WinAPRS
How to use overlay files in XASTIR


Using Overlays in APRSIS32:

These examples are using IRLP Node overlay files.

Unzip (if required) the file and place the overlay file(s) in a directory/folder of your choice. In APRSIS32, You can browse to the directory/folder where you have placed your overlay file(s). I would create a sub-directory/sub-folder under the folder where you have APRSIS32 installed.

On the Main Menu bar select Configure - Overlays - Add Overlay...


In the "Overlay File" window, browse to where the overlay file is, click on the overlay filename and click on Open


The IRLP Nodes using Callsigns (in this example) will be displayed. The map here is zoomed out.


If we zoom in on our map, for example around the Ottawa Canada area, we will see less Nodes and can differentiate between them. In this example the callsign labels are turned off.


In this example the callsign labels are turned On.


Click on the Node symbol to the left of a callsign or Node ID will open a menu with information about the Node:


Click on the top line of the menu and the menu will disappear and an information window about the Node will open:

One line format .pos file:


In this example the callsign is the title of the window, and the Node ID, frequency, (Offset) and tone will be indicated. Below this will be more information of the Node including distance and bearing from your station

Two line (UI-View) format .pos file - for IRLP Node overlays includes City, Prov/State, and Country.


Click on the top line of the menu and the menu will disappear and an information window about the Node will open:

In these examples the callsign or Node ID is the title of the window, and the Callsign/IRLP Node ID, frequency, (Offset) and tone will be indicated. The second line will give Callsign/Node ID and the location of the Node. Below this will be more information of the Node including distance and bearing from your station


Everytime you add an overlay the list of available overlays will grow. This list is only a list of overlays that you have tolds APRSIS that you want to use. You may have many more in your overlays directory/folder.

You can have more than one overlay open at a time in APRSIS32.
To see which overlays are open Click on Configure - Overlays and the unchecked overlays are available and the checked overlays are ones that are visible on the APRS map.


To turn Off an overlay, click on Configure - Overlays and then uncheck the overlay you want to turn Off. An "Overlay" window will pop up and ask if you want to "Remove Overlay From List?"


Click on "Yes" and the overlay will close and will be removed from the list of overlay choices. Click on "No" and the overlay will close and the overlay will remain in the list for selection. If you remove an overlay from the list, you can add it back in the future using the "Add Overlay" function above. Note that there will be a time delay before the overlay objects are cleared from the APRS map.

In APRSIS32, the overlay objects will remain visible until you deselect the overlay file. If you leave an overlay(s) loaded when you close down APRSIS32, the overlay(s) will still be loaded and displayed when you reopen APRSIS32.


How to use overlay files in UI-VIEW32
How to use overlay files in WinAPRS
How to use overlay files in XASTIR


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