Worked example · F1/F2
F1/F2 spread lines — what they mean and how to review them
F1 and F2 (face left / face right) observations help detect instrument setup issues. SurveyMarkup extracts spread-related lines from .rpt/.txt reports as advisory prompts — not pass/fail certification.
Advisory and unverified — not for survey deliverables. A registered surveyor must confirm any output before it is relied on.
What F1/F2 spread indicates
Large spreads between face observations can point to setup, targeting or environmental issues worth a second look.
How SurveyMarkup surfaces them
Report Reader pulls spread and tolerance lines into a summary with references back to the source report.
Related next steps
Open Report Reader
Advisory and unverified — not for survey deliverables. A registered surveyor must confirm any output before it is relied on.