Before you pay for a formal subdivision survey, a rough GPS-mapped split tells you whether the idea even pencils out.
A subdivision idea is cheap to sketch on a napkin and expensive to find out doesn't work once a surveyor's invoice arrives. Mapping a rough split first closes that gap.
Start from the real boundary, not the plat
Walking the existing parcel boundary with GPS gives you the actual current shape and area to split against — plats can be decades old and miss fencing, easements or encroachments that affect where a sensible line actually falls.
Sketch splits against real constraints
Road frontage, setback requirements and existing structures all limit where a lot line can realistically go. Testing a few split options against the mapped boundary catches an unworkable idea before it costs a survey fee to rule out.
What to bring to the surveyor once it pencils out
- The full parcel boundary and your proposed split lines, so the formal survey starts from your intent rather than a verbal description.
- Rough acreage for each proposed lot, to sanity-check against local minimum lot size rules before you're committed.
- Any known discrepancy between the old plat and what you walked, flagged up front rather than discovered mid-survey.
FieldCalc makes it easy to map the existing boundary and sketch split lines against it, so the idea is tested before the formal survey is ordered.
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