EPSG:3580 · Canada
NAD83 / NWT Lambert to KML & KMZ
NAD83 / NWT Lambert (EPSG:3580) is a Lambert Conformal Conic coordinate system on the NAD83 datum, with coordinates in metres. Its official area of use is: Canada - Northwest Territories onshore.
- Converter already set to EPSG:3580
- Latitude and longitude on WGS 84, as Google Earth uses
- Download the point as KML
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Good to know
- Datum: Treated as WGS 84, no shift (the datums agree to about a metre or better).
Convert a whole spreadsheet
- Open the web app or the Windows app, and paste your rows from Excel or open a CSV file.
- Under Coordinate system, search for “3580” and pick NAD83 / NWT Lambert.
- Check one point you know on the map, then press Save KML or Save KMZ and open it in Google Earth.
Check points for EPSG:3580
Five points inside the area of use of NAD83 / NWT Lambert, with their latitude and longitude on WGS 84 and their easting and northing in this grid (metres). Enter an easting and northing in the converter above: you should get the latitude and longitude shown, to a few centimetres.
| Point | Latitude | Longitude | Easting | Northing |
|---|---|---|---|---|
| Middle of the area of use | 69.39500° N | 119.23000° W | -283,243.28 | 9,184,579.91 |
| Towards the north-west | 75.04400° N | 129.56800° W | -505,597.61 | 9,872,694.69 |
| Towards the north-east | 75.04400° N | 108.89200° W | 90,591.87 | 9,803,603.88 |
| Towards the south-west | 63.74600° N | 129.56800° W | -854,724.38 | 8,660,128.44 |
| Towards the south-east | 63.74600° N | 108.89200° W | 153,147.65 | 8,543,328.84 |
Common mistakes with NAD83 / NWT Lambert
- Easting and northing swapped. In NAD83 / NWT Lambert the middle of the grid is near easting -283,243.28 and northing 9,184,579.91. If your easting column holds numbers like 9,184,579.91, the columns are the wrong way round and every point lands far away: swap them before converting.
- Feet entered as metres. NAD83 / NWT Lambert is in metres. Coordinates copied from a drawing in feet must be converted first, or every point moves outwards from the grid's origin.
- Forgetting the datum. NAD83 / NWT Lambert is not on WGS 84: treated as WGS 84, no shift (the datums agree to about a metre or better). Picking a WGS 84 grid with the same projection instead leaves the points off by that amount.
- Points outside the grid's area. NAD83 / NWT Lambert is meant for Canada - Northwest Territories onshore. Points well outside that area convert with growing error; the converter flags them so you can choose the right grid.
- A local site grid. If every point is off by the same distance and direction, the drawing may be on a local site grid. Calibrate on three or more known control points instead.
New to this? Read how to convert easting and northing to latitude and longitude.