North American Datum NAD83 NAD 83 1901/1927 North American Datum North American Datum https://en.wikipedia.org/wiki/North_American_Datum North American Datum of 1927 (NAD27) 10-100 ground meters North American Datum of 1927 (NAD27) North American Datum North American Datum North American Datum 1901/1927 North American Datum NAD 27 and NAD 83 http://en.wikipedia.org/wiki/North_American_Datum https://en.wikipedia.org/wiki/North_American_Datum... N North American Datum North American Datum North American Datum http://en.wikipedia.org/wiki/North_American_Datum NAD83 North American Datum North American Datum NAD 27 and NAD 83 this Wikipedia article North American Datum North American Datum North American Datum of 1983 (NAD83) http://en.wikipedia.org/wiki/North_American_Datum North American Datum North American Datum of 1927 (NAD27) NAD83 NAD 83 AD83 NAD83 NAD 27 and NAD 83 North American Datum 1901/1927 North American Datum North American Datum NAD-83 1901/1927 North American Datum NAD 83 North American Datum NAD-27 http://en.wikipedia.org/wiki/North_American_Datum NAD83