Determining whether you have found the correct intersection station

There are several types of intersection stations. With each of them, it is extremely critical to determine:

If you are looking for a water tower and have found one in the right place:

Read the datasheet carefully to note the description of the water tower, and the first date the water tower was reported or established as a survey mark. For example, the datasheet says the water tower has 4 legs, has a cone shaped top, and was monumented in 1931.

If you are looking for a church steeple, smokestack, radio tower, building cupola, or other such object and have found one in the right place:

Be sure to read the entire datasheet carefully. Pay particular attention to the date that the first date the structure was reported or established as a survey mark. The structure you find must be one that you're certain existed and appeared the same way as it did on that date. If the structure was re-built then the station is effectively destroyed since the re-built version of the structure might be an inch or so different in position. If you're uncertain about what happened during the time between when the structure was first monumented and the present time, check with the structure's building manager.

If you did not find the correct intersection at the location

Unlike some other types of marker, intersection stations are always adjusted stations, so your GPS receiver will tell you whether or not you are at the position of the intersection station.

Intersection Station Finding (last edited 2009-03-21 21:03:19 by localhost)