Technology

The StreetMapper system comprises state of the art DGPS and IMU components combined in the TERRAcontrol system, a roof mounted laser scanner platform, and a rack-mount PC/instrumentation cabinet. A custom-designed power supply and operator workstation is provided for each system depending on the survey vehicle. Two 12 megapixel geo-referenced cameras are also included for documentation purposes. The system is extremely versatile and can be deployed on various vehicles:

• Typical van (usually with a high roof)
• 4x4 vehicle
• Quad bike (larger models)
• Boat
• Train

StreetMapper uses 360 degree laser scanners, with a range of 500m. Each scanner performs up to 300,000 measurements per second with a scanning rate up to 100 scans per second. Numerous laser scanners can be used, and can be arranged on the scanner platform to suit the customer’s requirement.

Accuracy

The StreetMapper survey vehicle uses well-proven laser scanning technology to capture the position of up to 600,000 3D points per second whilst in motion. The typical positional accuracy is 1-2cm (for good GPS conditions) and the point-to-point accuracy within the data is 1cm.