15. Creation of Permanent Reference Markers
Specifications:
Primary network:
• Spacing > 1000 meter
• Horizontal error between two points >
10mm
• Vertical error between two points 2.0
mm (loop misclosure)
15
18. Construction surveying
Requirements:
• High accuracy
• Proven technology
• Reliable supplier
• Reliable after sales organisation
• Quick response time in case of emergency
18