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Queensland Australia Builds High-Precision GPS Network
with Trimble VRS Software

SUNNYVALE, Calif., Feb. 26, 2002 - Trimble (NASDAQ:TRMB) announced today it has supplied Global Positioning System (GPS) Virtual Reference Station (VRS™) software to the Queensland Resource Registry (QRR) to establish the first VRS network in Australia. The VRS network will provide networked real-time kinematic (RTK) GPS services across southeast Queensland for surveying, construction, navigation, asset management, agriculture and forestry.
The establishment of the Queensland VRS follows other Trimble infrastructure project successes, such as: the Japanese Geographical Survey Institute Nationwide Network; VRS network in Switzerland for the Swiss government;, the VRS network in Denmark; GPS reference stations for the General Lighthouse Authority Network around the coast of Great Britain; the Channel Tunnel Rail Link RTK Network; and the Zurich International Airport Expansion Project.
"Trimble's VRS technology overcomes many limitations," said Matt Higgins, senior surveyor of Queensland's Department of Natural Resources and Mines. "Users no longer need to establish and run a GPS receiver and radio at their own reference station. Additionally, the distance restriction of data transmission by radio is nullified by the use of mobile phone technology, and the presence of multiple reference stations increases confidence in the users' positions."
About the Queensland VRS
The GPS network consists of Trimble GPSNetTM, RTKNetTM, Webserver software and a communications infrastructure. QRR is currently expanding the network to make the service available to GPS users throughout southeast Queensland.
VRS technology overcomes previous limitations with high precision GPS by utilizing data from a network of reference stations to model the error sources within the network. The system significantly reduces these systematic errors to improve reliability and operating range. Standard format RTK messages are transmitted via GSM cellar telephones to users in the field within the network area. This allows a user to increase the distance at which the rover receiver is located from the physical reference stations while improving on-the-fly (OTF) initialization times.
Traditionally, for precise GPS applications-surveying, construction, precision farming and high accuracy Geographic Information System (GIS)-roving receivers required a reference station within 10 kilometers to ensure centimeter level accuracy. With VRS, users within the network can operate consistently at greater distances without degrading accuracy. Additionally, users can retrieve stored GPS and modeled data from the control center via the Internet for post-processing. Trimble Terrasat developed the VRS software suite.
Before VRS, users occupied physical marks in the ground that form the geodetic network and used QRR's information about the 3D coordinates of those marks. VRS enables QRR to move this service to a more digital approach and deliver the geodetic reference system in real-time at greater distances via the mobile phone network. VRS is expected to enable some savings to QRR in not having to maintain as many of the physical marks across southeast Queensland. However, the real opportunity for QRR comes from increased revenue by opening up the geodetic reference system to new users and applications.
About QRR
The Queensland Resource Registry (QRR) is a business unit of the Department of Natural Resources and Mines (NR&M) in Queensland, Australia. QRR provides secure registers of resource interests and related information. QRR's registration and information services underpin the achievement of the Department's vision for prosperity through sustainable natural resource management by ensuring the certainty in natural resource ownership that is needed for sound decision making. QRR is the lead agency for surveying and mapping within the Queensland government and is responsible for the fundamental geodetic infrastructure. For more information, visit:
About Trimble's Engineering and Construction Division
The combination of Trimble and Spectra Precision, the world leaders in GPS, construction lasers, robotic total stations and machine control solutions, is creating a broad range of innovative solutions that will change the way construction work is done. The Engineering and Construction Division of Trimble is focusing on the development of technology and solutions in the core areas of machine control, surveying, and construction instruments. From concept to completion, Trimble's integrated systems streamline jobs and improve productivity.
About Trimble
Trimble is a leading innovator of Global Positioning System (GPS) technology. In addition to providing advanced GPS components, Trimble augments GPS with other positioning technologies as well as wireless communications and software to create complete customer solutions. Trimble's worldwide presence and unique capabilities position the Company for growth in emerging applications including surveying, automobile navigation, machine guidance, asset tracking, wireless platforms, and telecommunications infrastructure. Founded in 1978 and headquartered in Sunnyvale, Calif., Trimble has more than 2,000 employees in more than 20 countries worldwide.

Media Contact:    LeaAnn McNabb of Trimble: 408-481-7808

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