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Police and Emergency Vehicles        

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Public Safety

publicsafetyEmergency response teams ... ambulance, fire fighters, police, and others ... have a common, critical requirement: to know exactly where they are needed. Seconds count in getting to the victim, the fire, or the scene of the crime. That's where a Neumann Communications GPS/AVL (Automatic Vehicle Location) Subsystem from Trimble can help. Trimble GPS/AVL Subsystems have been installed and are operational in the U.S. and abroad in numerous emergency response applications such as fire-fighting, ambulance and towing, as well as many others. Our proven, one-source combination of professional services, hardware and software can be readily adapted to virtually any environment and requirement in the Public Safety sector.

Mobile positioning unit with integrated communications interface

Police Application

placer_450_455The Placer™ GPS 450/455 is a mobile positioning unit with a tightly integrated communications interface. When combined with a communications transceiver, the system's GPS receiver reports vehicle position, speed, time, and status from anywhere in any weather, over radio or cellular communications networks. With the Placer GPS 450/455, emergency response operations have a flexible, high-performance system for implementing a mobile positioning and communications solution.

The compact Placer 450 GPS unit includes two serial ports for connection to wireless modems, radios, and terminal displays such as personal computers, laptops, mobile data terminals, or status terminals. The Placer 455 has three serial ports, and supports an optional Dead Reckoning upgrade for use in difficult urban environments.

The Placer 450/455 units provide:

San Diego Fire Department Improves
Response Timeps_sandiegofire

The San Diego Fire Department uses 126 vehicles to provide fire fighting and emergency response services to the city of San Diego. A Trimble GPS-based AVL system from Trimble's Mobile Positioning and Communications group, installed in 1992, allows operators to dispatch the closest vehicle to an emergency. San Diego has implemented a time/distance reporting system to optimize radio bandwidth. This system reports vehicle position only if a vehicle has moved a specified distance or if a predetermined amount of time has elapsed since the last position report.

Chicago 911

An emergency erupts. So much rests on what happens in the next few minutes: a moment can mean the difference between a life saved and a life lost. Emergency operators make vital decisions between the time a call comes in and an emergency vehicle goes out. In industry parlance, this window of time is known as the "response time." The goal of every public safety agency is to keep response times to a minimum and get crews to emergency scenes as fast as possible.

map1With Chicago's new 911 system, dispatchers see the entire city on a digital map.

Dispatchers can zoom in on the map to view details.

map3Once an emergency has been located, a dispatcher can bring up specific information about a building.

The system also displays a wealth of additional information, such as the exact location of hydrants.

Imagine the complexity of that task in a city like Chicago, where operators handle fifteen million emergency calls a year - nearly 14,000 a day - dispatching more than 50 ambulances, 2,000 police cars, and dozens of fire trucks. In recent years, a growing population and increasingly complex communications infrastructure have slowed the response times of Chicago's 911 service. To get back on track and ensure citizen safety, the city has invested in a state-of-the-art emergency response system built with GPS-based Automatic Vehicle Location (AVL) hardware and software from Trimble. Chicago's system has become a model for public safety agencies worldwide.

Better decisions quicker. Under Chicago's previous system, dispatchers made decisions using tabular data typed on 3-by-5 cards. Precious seconds ticked away as they searched the cards for relevant data about a particular street, building, or precinct. The new system is far more efficient and intuitive. All the information a dispatcher needs to manage a call is displayed on a digital map in front of them. This display provides a picture of an emergency scene, complete with fire hydrant locations, street directions, building size and real-time fire truck locations, putting them in complete control of an emergency situation.

So how does the new system work? Chicago's ambulances and fire trucks are equipped with Trimble GPS receivers and mobile data terminals. The GPS receivers gather location data and the mobile data terminals send it to Chicago's emergency command and control center over a radio network. At the center, a complex network of computer and communications technology routes the location data to digital map displays at dispatcher workstations which provide real-time snapshots of vehicle locations.

Map Data Interchange: Providing accurate data. Dispatcher workstations integrate data from a computer aided dispatch (CAD) system and a custom geographical information system (GIS) built with a Trimble tool called Map Data Interchange. The GIS consolidates a variety of databases including city street maps, telephone directory data, and other datasets. These datasets are made consistent using MDI which integrates datasets and finds conflicting data. These conflicts can then be resolved through investigation, or by going into the field and doing a little research, creating a truly accurate database.