The following table lists the commonly-used projection parameters for Idaho GIS data. In addition to the data below, please review the ITA Projection Standard (S4210).
| Idaho Transverse Mercator (IDTM83) | Albers Equal Area | Lambert Conformal Conic | Universal Transverse Mercator, Zone 11 | Universal Transverse Mercator, Zone 12 | Idaho Transverse Mercator (IDTM27) | |
|---|---|---|---|---|---|---|
| Projection Name | PROJECTION TRANSVERSE | PROJECTION ALBERS | PROJECTION LAMBERT | PROJECTION UTM | PROJECTION UTM | PROJECTION TRANSVERSE |
| Units | METERS | METERS | METERS | METERS | METERS | METERS |
| Zone | Zone 11 | Zone 12 | ||||
| Datum | DATUM NAD83 | DATUM NAD27 | DATUM NAD27 | DATUM NAD27 | ||
| Projection specific parameter values | PARAMETERS | PARAMETERS | PARAMETERS | PARAMETERS | ||
| 1st standard parallel | 43 30 00 | 33 00 00 | ||||
| 2nd standard parallel | 47 30 00 | 45 00 00 | ||||
| Scale factor at central meridian | 0.9996 | 0.9996 | ||||
| Central meridian | -114 00 00 | -114 00 00 | -114 00 00 | -114 00 00 | ||
| Latitude of origin | 42 00 00 | 41 45 00 | 42 00 00 | 42 00 00 | ||
| False easing | 2,500,000 | 0.0 | 0 | 500,000 | ||
| False northing | 1,200,000 | 0.0 | 0 | 100,000 | ||
| Vertical Datum | NAVD88 |
