What is the G-line in a survey map, and how do you read it?
Spotted a thick outer line on your FMB sketch or village map marked 'G'? That's the G-line — the village boundary. Here's what the G-line means, how it differs from the F-line, and how to read it on your survey sheet.
If you've looked closely at an FMB sketch or a village survey map, you may have noticed a heavier line running around the outside, sometimes labelled with a 'G'. People often ask how to read this G-line. It's actually one of the most useful lines on the sheet, because it tells you exactly where one village ends and the next begins.
What the G-line is
G-line stands for Gramam line — gramam meaning village. It is the revenue village boundary: the outermost line that encloses everything belonging to that village. Every field, road and channel inside it is part of the same village; anything past it belongs to a neighbouring village.
G-line vs F-line: don't mix them up
- G-line (Gramam line)
- The outer village boundary. There is one G-line around the whole village.
- F-line (Field line)
- The boundary of a single field or survey number inside the village. There are many F-lines, one around each parcel.
A quick way to remember it: the G-line is the wall around the whole village; the F-lines are the walls between individual fields inside it.
How to read the G-line on your sheet
- Find the thickest continuous line that forms a closed loop around the edge of the map — that's the G-line.
- Check where it touches the edge of your sheet. If it runs off one side, the village continues onto the adjacent numbered sheet (S1, S2, S3 …).
- Note the fields that sit right against the G-line — these are your village's border plots, and disputes here often involve the neighbouring village.
- Use the F-lines inside to locate your own survey number and its subdivisions.
Why the G-line matters for boundary disputes
Because the G-line is the legal edge of the village, any plot touching it borders another village's land. When neighbours disagree about a boundary at the village edge, the G-line on the FMB and village map is the reference both revenue offices use. Reading it correctly tells you whose jurisdiction a disputed strip falls under.
Frequently asked questions
What does the G-line stand for?+
G-line stands for Gramam line, meaning village line. It is the revenue village boundary — the outermost line on an FMB sketch or village map that encloses the whole village.
What is the difference between the G-line and the F-line?+
The G-line is the single outer boundary of the entire village. The F-line is the boundary of an individual field or survey number inside the village, and there are many F-lines — one around each parcel.
Why is the G-line important in a boundary dispute?+
Because it is the legal edge of the village, any plot touching the G-line borders a neighbouring village's land. Both revenue offices use the G-line on the FMB and village map as the reference, so reading it correctly shows whose jurisdiction a disputed area falls under.
My G-line runs off the edge of the sheet — what do I do?+
That means the village continues onto an adjacent numbered sheet (S1, S2, S3 …). Download the neighbouring sheets and join them so the full G-line forms one closed loop around the whole village.