What does DAO 2007-29 specify about the use of GPS in land surveys?

• A. GPS is required for all surveys
• B. GPS may be used but must be verified by traditional methods
• C. GPS is prohibited in urban areas
• D. GPS data must be processed by the DENR

Answer: (B)

GPS can be used in land surveys, but its results must be verified by traditional methods to ensure accuracy and conformity with cadastral standards. This approach leverages the strengths of GPS for efficient positioning while using conventional measurements to tie the survey to physical monuments and to validate coordinates before the plan is finalized. So, GPS is allowed as a tool, provided there is cross-checking with conventional techniques. It is not required for all surveys, it is not prohibited in urban areas, and processing is typically done by the surveyor rather than exclusively by the DENR.