trying to identify the coordinates

[larynx]

I have a map of a land subdivision (circa 1968) and it has several types of coordinates on it that I'm not familiar with, how do I convert these coordinates to GPS coordinates (long, lat):
North 785538.56
East: 1362921.98


Thanks in advance.

[withak]

Figure out what coordinate system they are in and then use one of the many online converters.

[larynx]

That's what I've been trying to do, I search all over but I can't seem to find it. Does it look familiar?

[withak]

There is no way to tell just from the numbers, it should be printed on the map somewhere.

[larynx]

Here is the map that I'm looking at: http://www.arkmaps.com/details.asp?ID=00000268

I'm trying to find the location in the top right corner (the dot inside the circle), so I can place it on top of an aerial photo.

[withak]

Probably a state grid.

[larynx]

how can it be converted to GPS coordinates?

[m_k]

Check http://www.ngs.noaa.gov/cgi-bin/spc_getgp.prl
You need zone number, which can be found here http://www.ngs.noaa.gov/cgi-bin/spc_zones.prl (by county name)