.
To illustrate this, let's look at Oregon (Figure 8). It uses the Lambert conformal conic
projection for both the north and south zones. The central meridian is the same for both
zones, with an easing of 2,000,000 feet in the original system. In Figure 8 the two red dots
indicate the latitudes of the origins: the North Zone's origin is located at the top red dot, and
the South Zone's origin is at the bottom red dot.
Figure 8. North and south zones of the Oregon
state plane coordinate system
We record SPC coordinates in the same manner as UTM coordinates: an easting value
followed by a northing value. Specifically, the correct form of SPC notation is to give the
easting in feet, the northing in feet, then the state and the zone name. For example, you would
give the location of the state capitol dome in Madison, WI like this: 2,164,600 ft E, 392,280 ft
N, Wisconsin, south zone.
4. Coordinate Determination On Maps
