How to create buffer and setback zones for parcels, lines and sites
Buffers make distance rules visible around points, lines and polygons.
Field takeaways
- A buffer is a zone generated at a specified distance around geometry.
- Setback rules come from law or project requirements; the app creates geometry.
- Metric buffers should be interpreted in a suitable projected CRS.
- Point, line and polygon buffers serve different field decisions.
- MapLab Survey can keep buffers as layers and export them.
What a buffer answers
A buffer draws a band at a fixed distance around a point, line or polygon. It answers questions such as how far a structure must sit from a stream, a road edge or a boundary.
Measure from the right feature
A setback is measured from a defined edge, and choosing the wrong one shifts the whole band. Confirm whether the distance runs from the centreline, the bank or the legal boundary.
Horizontal, always
Buffers are horizontal distances. On sloping ground the surface distance is longer, which matters when the band is staked out.
Take it to the field
Export the buffer as a layer and walk it. Seeing where the band actually falls catches conflicts a plan view hides.
See it in action
MapLab Survey | Professional Mobile GIS, GPS Surveying & Land Measurement App
Visit the YouTube channel ->Try these steps on your own phone.
MapLab Survey handles RTK/GNSS point capture, drawing, area and volume calculations and coordinate conversion, then exports to DXF, KML/KMZ, GeoJSON, Shapefile, GeoPackage, NCZ or CSV. Capture, calculation and export work offline. Live NTRIP corrections and online basemaps need a connection.
Frequently asked questions
What is a buffer?
A zone created at a specified distance around geometry.
Can MapLab Survey draw setbacks?
It can draw the geometry; the rule must come from the project or regulation.
Can buffers be exported?
Yes, to KML/KMZ, DXF or GeoJSON.
Does CRS matter?
Yes, especially for metric distances.
Technical references
The field guidance in this article is aligned with the technical and official references below.
Related: Finding parcel corners · Exporting field data to CAD/GIS · Open DXF on phone · MapLab Survey