Nine Elms · Site traverse
Precision geomatics,
in the browser.
Live COGO calculators, format conversion, and field reference—built for surveyors who need answers on site, not another desktop install.
E 532147.214 · N 181042.891 · 6 live calculators
Format Converter
Turn instrument files into the format you need.
Upload CSV, GSI, SDR, LandXML, and more. Map columns, review points, and export to the format your CAD package or total station expects.
CSV & TXT parsed in-browser · Sign in to export
Drop a file or click to browse
Opens the full converter workspace
Supported formats
Computation that stays on your device.
Every calculator runs locally. Open a tool, enter observations, get results—no installers, no upload of control data to a black box.
Calculators and conversion, side by side.
The workbench is the product. Start with a live calculator, or open the format converter when you need GSI, CSV, or DXF in the right shape.
Calculators
AvailableTienstra, Bowditch, traverse closure, bearing & distance, polygon area, column center—and more on the roadmap.
All calculatorsFormat Converter
Sign inMap fields, review points, and export to the format your instrument or CAD package expects. Sign in to run conversions.
CSV · GSI-8 · GSI-16 · DXF · LandXML · SDR
Open converterMethods paired with the tools that run them.
Learning paths cover foundations through structural practice. Tool guides sit next to the calculators they explain—read the method, then compute.
Field reference and curated standards.
NSSS tolerances, EPSG codes, bearing conventions, and links to professional bodies—one place for on-site lookup.
Pricing
Calculators are free. Conversion needs an account.
Use every live calculator without signing in. Create an account when you need the format converter.