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.

Is there any indication on the map about the coordinate system?

I think it could be state-plane or UTM. In either can I think it would tell you somewhere what the Zone is.

For info on state plane including tools for interactive conversion see:
SPC UTILITIES
NGS SPC TO GEODETIC
(found from searching for "state plane coordinates")

For UTM see:
Geographic/UTM Coordinate Converter
(searched for "UTM coordinates")

Hope this helps!
Eric

here is the map that I am looking at: Arkmaps.com Plat Map Search Engine

I don't see any zone information, but then again I'm not sure what it looks like.

That is using Township and Range, see the description on the upper left.

It looks like Township 21 North and Range 30 West, fifth principal meridian, Arkansas.

It looks like you could use this Township Geocoder to come up with lat/lon --
GeoCommunicator - Township Geocoder
However they don't include Arkansas!

This may just be a job for a land surveyor..

If you get the pdf of the map, you could convert to tif and then register / align it in a GIS package like MapInfo, this could give you estimates of the lat/lon.. the software tools and data to do this could set you back a it however..

Eric

Thank you very much! I will look into that application.