mapbench

Latitude Longitude Map

Plot one coordinate pair or a whole list: paste lat/lng lines, get numbered pins on the map, click any pin for DD and DMS readouts, and export the set as CSV.

FreeWorldwide
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Quick answer: Paste coordinates and plot them as numbered pins on an interactive map. Coverage: Worldwide. No account is required.

Worked examples

  • 40.7128, −74.0060 — The same Lower Manhattan point can be written as 40° 42' 46.08" N, 74° 0' 21.60" W or 18N 583959 4507351. Different formats describe the same location.
  • MGRS precision — For the same sample point, a 10-digit MGRS reference is 18?WK8395907350. More digits increase numeric precision, not the accuracy of the original measurement.
  • Decimal places — Five decimal places of latitude are roughly metre-scale. That does not mean a phone GPS measurement itself is accurate to one metre.

Limits & appropriate use

Coordinates are lossless in principle and lossy in practice, and every loss is human: swapped axes, wrong hemispheres, datum relics, precision theatre. The converters eliminate the notation problem completely — DMS, UTM, MGRS and Plus Codes are exact translations on WGS84 — but they cannot eliminate the provenance problem: a number without its datum and its source is a rumour. Old NAD27-era documents, hand-typed sheets and seven-decimal CSVs each carry their own failure signature, and the honest tool answers with validation errors and visible pins rather than silent corrections.

The practical boundary is therefore organisational, not mathematical: teams that standardise storage (decimal, WGS84, sane precision) and ritualise the map check enjoy a lossless system; teams that don't accumulate expensive folklore. For work beyond consumer frames — control points, machine guidance, legal description — the escalation is geodetic: licensed surveyors, published transformations and national datums. Everything between a pasted waypoint and that door is exactly where this toolset lives.

  • Datum-critical legacy data → published grid transformations (NTv2/HTDP).
  • Control points and machine guidance → licensed geodetic survey.
  • Aviation/marine charts → the chart's own datum and notation, verbatim.

Data & methodology

All conversions (DMS, UTM with Norway/Svalbard exceptions, MGRS, Plus Codes) run locally on WGS84 with standard geodetic series; round-trips are exact at display precision.

For source details, licences and model limitations, see Data Sources and Methodology.

Related tools

Category: Coordinates. Results are intended for everyday analysis and planning unless a page explicitly states otherwise.

How to use

  1. 1Paste coordinates into the box, one per line.
  2. 2Press “Plot on map” to drop numbered pins.
  3. 3Click a pin for DD and DMS readouts, or a list row to remove it.
  4. 4Use Fit bounds or Export CSV when done.

Frequently asked questions

What coordinate formats are accepted?

Decimal degrees like 40.7128, -74.0060, space-separated pairs, and hemisphere notation like 40.7° N 74° W. One pair per line.

How many points can I plot?

Dozens at once — each gets a numbered pin and a row in the list panel.

Can I export the plotted points?

Yes — one click downloads a CSV with index, latitude, longitude and your original input line.

What happens to lines that fail to parse?

They are listed with their line number so you can fix the format without losing the valid points.

Is my data uploaded anywhere?

No — parsing and plotting run entirely in your browser.