APRS^TM is an integration of hardware and software that allows you to automatically track moving objects (such as vehicles, people, and weather) in real time using maps displayed on your computer monitor.
Developed by Bob Bruninga, WB4APR in the early 1990's and in more than 10 years since its introduction, it has grown to encompass just about every aspect of Amateur Radio.

Operation of APRS requires :

• an amateur radio station.
• a packet radio TNC ( or soundcard ).
• a computer.
• APRS software.

Unlike other packet radio applications ( PBBS's, nodes and DX clusters, etc ), APRS uses an UNCONNECTED protocol to transmit your exact position, a symbol denoting the type of station you're running and a brief comment about it. It also used as direct keyboard-to-keyboard "chatting," has direction-finding capabilities, can be interlinked via the internet, used to view weather ( and earthquake ) transmitted from the weather stations, and much more.

Since this is an UNCONNECTED protocol, on-air packets can be kept to a minimum. With APRS you only send ONE packet to convey your information. If it's not received on the first transmission, APRS retransmits this information using a decaying time delay. This makes more efficient use of the frequency.

There are several programs available for APRS, such as WinAPRS, javAPRS, APRSPLUS, Pocket APRS, WayPoint, UI-View, etc.

For further information, please visit Jeff Brenton, KA9VNV, APRS website.

APRS Maps
APRS software requires map to dispay the position of other APRS stations on the computer monitor.
Below are several maps for country of Indonesia :

Island / Province :
Indonesia Jawa Bali Lombok Aceh	North Sumatera Batam Bangka	West Sumatera Bengkulu South Sumatera	Lampung Kalimantan Papua

C i t y :
Jakarta Jkt - Kemayoran Jkt - Menteng Jkt - Tebet	Bandung Semarang Surakarta Yogyakarta	Surabaya Medan Palembang	Makassar

Note :

• All the maps are set up for UI-View software and compressed in ZIP files.
  
• These maps are fairly accurate but since they are not reproduced from a map program, they do have errors.
  
• If you make a new map or correct the .inf files please forward to me to put into this site.
  
• I am still collecting maps for other areas, so please visit this page regularly for latest updates, or visit my other APRS maps directory.