EPSG:2242 · United States
NAD83 / Idaho Central (ftUS) to KML & KMZ
NAD83 / Idaho Central (ftUS) (EPSG:2242) is a Transverse Mercator coordinate system on the NAD83 datum, with coordinates in US survey feet. Its official area of use is: United States (USA) - Idaho - counties of Blaine; Butte; Camas; Cassia; Custer; Gooding; Jerome; Lemhi; Lincoln; Minidoka; Twin Falls.
- Converter already set to EPSG:2242
- Latitude and longitude on WGS 84, as Google Earth uses
- Download the point as KML
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Good to know
- Coordinates are in US survey feet. Enter them in those units, not metres.
- 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 “2242” and pick NAD83 / Idaho Central (ftUS).
- 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:2242
Five points inside the area of use of NAD83 / Idaho Central (ftUS), with their latitude and longitude on WGS 84 and their easting and northing in this grid (US survey feet). 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 | 43.84500° N | 113.98500° W | 1,644,373.87 | 793,876.53 |
| Towards the north-west | 44.95800° N | 114.77400° W | 1,440,060.08 | 1,200,573.55 |
| Towards the north-east | 44.95800° N | 113.19600° W | 1,848,539.02 | 1,200,649.12 |
| Towards the south-west | 42.73200° N | 114.77400° W | 1,432,467.18 | 389,167.49 |
| Towards the south-east | 42.73200° N | 113.19600° W | 1,856,426.26 | 389,242.81 |
Common mistakes with NAD83 / Idaho Central (ftUS)
- Easting and northing swapped. In NAD83 / Idaho Central (ftUS) the middle of the grid is near easting 1,644,373.87 and northing 793,876.53. If your easting column holds numbers like 793,876.53, the columns are the wrong way round and every point lands far away: swap them before converting.
- Metres entered as feet. NAD83 / Idaho Central (ftUS) is in US survey feet. Enter the values as they are; converting them to metres first puts every point in the wrong place.
- Forgetting the datum. NAD83 / Idaho Central (ftUS) 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 / Idaho Central (ftUS) is meant for United States (USA) - Idaho - counties of Blaine; Butte; Camas; Cassia; Custer; Gooding; Jerome; Lemhi; Lincoln; Minidoka; Twin Falls. 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.