The invention relates to an improved data logging system for logging the movement of vehicles and plotting it on a map and provide general daily log reports such as total distance traveled, average speed and number of hours stationary etc. Using such a data logging unit the owner of the vehicle will be (deleted) able to track (replace with) log the general losses incurred due to detouring (replace with) trip made for maintenance of vehicle (replace with) creation of map databases.
The ability to track and log the vehicle position is an essential utility for any fleet management application (replace with) map making. The use of global positioning system (GPS) offers the task of fleet management (replace with) map making a
certain level of control by enabling to locate precisely a vehicle in space and time. With GPS fleet management (deleted)
system it may be possible to integrate and modify the capability built-in to scale it up or down with ease.
The global positioning system (GPS) with data on location, time, speed, direction, continuously and in any where, provides the capability to locate a vehicle in three dimension space.
Global position system (GPS) is a satellite-base radio navigation system developed and operated by the U.S. Department of Defense (DOD). GPS permits land, sea and airborne users to determine their three-dimensional position, velocity and time 24 hours a day, in all weathers, and where in the world with a precision and accuracy far better than other radio navigation system available today.

GPS consists of three segments: Space, Control and User. The Space segment consists of 24 operational satellites in six circular orbits 20,200 Km (10,900 nautical miles) above the earth at an inclination angle 55 degrees with a 12 hours period. The satellites are spaced in orbit so that at any time a minimum of 6 satellites will be in view to users any where in the world. The satellites continuously broadcast position and time data to users throughout the world.
The Control segment consists of master control station in Colorado Springs, with five monitor stations and three ground antennas located throughout the world. The monitor stations track all GPS satellites in view and collect ranging information from the satellite broadcasts. The monitor stations send the information they collect from each of the satellites back to the master control station, which computes extremely precise satellite orbits.
The information is then formatted into updated navigation messages for each satellite. The updated information is transmitted to each satellite via the ground antennas, which also transmit and receive satellite control and monitoring signals.
The user segment consists of the receivers, processors and antennas that allow land, sea or airborne operates to receive the GPS satellites broadcasts and computes their precise position, velocity and time.
The GPS concepts of operation is based upon satellites ranging. Users figure their position on the earth by measuring their

distance from the group of satellites in space. The satellites act as precise reference points.
Each GPS satellite transmits an accurate position and time signal. The users receiver measures the time delay for the signal to reach the receiver, which is the direct measure of the apparent range to the satellite.
Measurements colleted simultaneously from four satellites are processed to solve for the three dimensions of position, velocity and time.
The data logging system users the GPS satellites as a means of logging the vehicle position. Each vehicle normally has a data logger unit placed inside the vehicle. Periodically, the vehicle(s) are polled by a GPS which receives the information for the GPS satellites.
The data logging system is composed of two components.
A geographic information system (GIS) component is used for capturing, managing and processing of all kinds of geographic and/or special database information and traffic information.
A global positioning system (GPS) component is used for realtime data acquisition regarding location of a vehicle.
Existing GPS based data logging system has a GPS unit and storage medium. The GPS calculates the location information at every second. This information is usually stored in the storage medium provided in the unit. At the end of the each trip of the

vehicle, the unit is removed from the vehicle and the data is transferred to the unit and the reports are generated.
A data logging system as described has certain limitations. Firstly, in such a system, no pulse setting (replace with) additional storage space is available. If the vehicle to be logged has to travel for more than one day (replace with) 4
hours, the logging system will not be able to store the GPS information without adding extra storage facility to the system.
In order to obtain the data from a vehicle, the data logger unit placed inside the vehicle has to be removed and connected and connected to a CPU (replace with) CPU/Laptop.
Complete data received by the GPS will have to be transferred to the CPU (replace with) CPU/Laptop and no reduction in storage requirement is possible by eliminating unwanted data.
One object of the present invention therefore, is to provide a data logging unit system with any sampling rate (time interval between samplingO as required by the consumer (replace with) this data logging system provide the facility to keep the existing vector/raster map data display on the screen while data logging. This will be increased the efficiency of logging system and save user the time.
Another object of the invention is to provide a data logging system that eliminates the need for removing the data logger unit from the vehicle to be logged and connecting it to CPU for transferring the data.

Another object of the invention is to the stored file format is in Shape file and user can be easy download these file and use for processing as per the requirement, (add this Para)
Easy collection of Ground control point by using this data logger, (add this Para)
Accurate geo positional data can be collected for Flyover (st.pt and ent pt.) and gap in medians, important Points Of Intersets etc.while data logging and user can assign the attribute for identification and future use. (add this para)
Yet another object of the present invention is to provide a data logging system where a reduction in storage requirement is possible by eliminating unwanted or ephemeris data.
The above-mentioned objects are achieved by using a switch, a controller and a programmed flash memory (replace with) data-logging device with inbuilt GPS receiver and SD card.
Inbuilt GPS receiver receives the signal from satellites and stores the required data in to the storage media provided in the unit, (add this Para)
A programmed flash storage medium (replace with) S.D. card can receive the information from the data-logging unit and transfer the information to a central processing unit (CPU) connected to the flash memory (replace with) S.D. card,

thus eliminating the requirement of removing the data-logging unit from the vehicle.
Thus the preset invention provides an improved data logging system for logging the movement of vehicle comprising an antenna and a global positioning system GPS receiver mounted on top of a vehicle to be logged; a data logging unit for receiving information from said GPS receiver and transferring to a central processing unit CPU; characterized in that said data logging unit comprises a switch for setting the sampling rate, a controller for deleting any unwanted data received, and a flash memory for transferring the information received from said SPS receiver to said CPU (deleted) for generating detailed reports on vehicle information.
The invention will now be described in details with the help of the accompanying drawings, where:
The data logger is a touch screen device it will operate with stylus. The programmed application load data logger will display the logging data directly on the screen.
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We claim
1. An improved data logging system for logging the
movement of vehicles, comprising
an antenna 1 and a global positioning system GPS receiver 3 mounted on top of a vehicle to be logged; a data logging unit 2 for receiving information from said GPs receiver 3 and transferring to a central processing unit CPU 11; characterized in that;
said data logging unit 2 comprises a switch 10 for setting the sampling rate, a controller 7 for deleting any unwanted data received, and a flash memory 9 for transferring the information received from said GPS receiver to said CPU 11 for generating detailed reports on vehicle information.
2. The improved data logging system as claimed in claim 1, wherein said logging unit 2 is powered by the vehicle battery 4 or a solar battery 4'.
3. The improved data logging system as claimed in claim 1, wherein said switch 10 is a DIP switch combinations 0 to 15.
4. The improved data logging system as claimed in claim 1, wherein said switch 10 is a programmable switch with 15 combinations 0 to 14.
5. The improved data logging system as claimed in the preceding claims wherein the information provided by

said GPS receiver 3 is stored in a static random access memory SRAM8.
6. The improved data logging system as claimed in claim 5, wherein the data stored in said SRAM8 is in an encrypted format for preventing unauthorised decryption.
7. The improved data logging system as claimed in the preceding claims, wherein said data logging unit 2 is provided with ports 5 and 6 for transferring data from said GPS receiver 3 to SRAM8 and from SRAM8 to said flash memory 9.
8. The improved data logging system as claimed in claim 7, wherein said ports 5 and 6 are RS-232 ports.
9. The improved data logging system as claimed in the preceding claims, wherein said SRAM8 is a 512 KB and said flash memory 9 is of 256 KB.
10.The improved data logging system as claimed in the preceding claims wherein said controller 7 is a rabbit 2000 processor.
11.The improved data logging system for logging the movement of vehicles substantially as herein described and illustrated in the figures of the accompanying drawings.

12.The improved data logging system for logging the correct location of start, end, gap in medians at flyover and maintain the manual drawing of the movement of vehicles.