What do yellow flags in the ground mean?

Related questions

1. Do Surveyors use GPS?
2. What is the accuracy of GPS surveying?
3. How long does it take to become a surveyor?
4. Is it illegal to remove survey stakes?
5. What is GPS surveying techniques?
6. What is the full form of DGPS?
7. What do surveyors use to measure land?
8. What is difference between GPS and DGPS?
9. What are the 3 segments of GPS?
10. What kind of math do surveyors use?

Tags

1. #cables
2. #conduit
3. #lines
4. #doesn
5. #yellow
6. #important
7. #materials
8. #power
9. #entire
10. #flags
11. #lighting
12. #electric
13. #indicates
14. #steam
15. #neighborhood
16. #gaseous
17. #petroleum
18. #represent