How to survey a pipeline route with line length, bends and delivery files
A pipeline route needs more than start and end points. Bends, obstacles, manholes, valves, elevation and delivery format matter.
Field takeaways
- Record the route as a line and utility elements as points.
- Photo notes at manholes, valves and crossings save office time.
- Elevation can be critical for drainage and slope.
- KML, DXF and CSV serve different delivery needs.
- MapLab Survey keeps route survey and delivery together.
A route is a line; the decisions are points
A pipeline is captured as line geometry, but the value sits at the breaks. Record the start, the end, the bends, road and stream crossings, manholes, valves and connections as named points and the office drawing almost prepares itself. The crossings are the expensive locations: where the route meets a road, a watercourse or a buried utility, take more detail, a photo and a note — variation orders are born there.
The field flow
- Open a dedicated layer: "water_line", "drainage_line" or "utility_line".
- Capture the route by walking a track or measuring the line.
- Record bends, manholes, valves and crossings as points.
- Add photos and descriptions.
- Check the DXF, KML, GeoJSON, CSV and report delivery.
Plan and profile together
A pipeline is designed in two dimensions at once. Measuring only the line in plan leaves out exactly the information that decides whether water flows or stands. On water, drainage and channel lines the level carries its own weight: phone heights inform reconnaissance, but design and construction levels need a proper method and a stated height reference.
Record before the trench
Survey the existing ground before excavation — once the trench is open that state cannot be recovered, and it is usually what the quantities are based on. After the pipe is laid and before backfill, record its centreline and invert level at the key points: that is the only record the operator will have in five years.
The delivery file
The line, the break points, the crossing details, the photos and the level notes go out under one job name as DXF, KML, GeoJSON or CSV. The line alone describes the route; with the points and notes it describes the job.
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
How is pipeline length measured?
As a line with bends along the real route.
Should manholes and valves be separate points?
Yes.
Is elevation needed?
For drainage and slope-sensitive work, yes.
Which formats are useful?
KML, DXF, GeoJSON, CSV and reports.
Technical references
The field guidance in this article is aligned with the technical and official references below.
Related: Route alignment survey · GPS track recording · QGIS NetCAD AutoCAD export · MapLab Survey