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GPSFileDepot Forums

General Category => Map Making Support => Topic started by: NeuroDoc on October 04, 2008, 01:04:18 PM

Title: Question about Datum
Post by: NeuroDoc on October 04, 2008, 01:04:18 PM
I am working on combing and compiling the data for a WA state map. I have been following the tutorial religiously, but I can't figure out the Datum.

What datum does all of this data use? I have assumed, that since it is coming straight from the source, that it is using NAD83, is that correct? If not, then I would have to tell my GPSr what datum to use, correct?

Thanks.
Title: Re: Question about Datum
Post by: -Oz- on October 04, 2008, 06:06:09 PM
Which program are you using?  Global Mapper and GPSMapEdit handle datums differently.
Title: Re: Question about Datum
Post by: NeuroDoc on October 04, 2008, 07:27:37 PM
I've been using Global Mapper.
Title: Re: Question about Datum
Post by: -Oz- on October 04, 2008, 08:21:30 PM
Most of the data is in nad83/wgs84 but some of it (as you know) is in nad27.  Then there are places like hawaii that use their own datum.

Most files include metadata of some sort that will tell you the datum.  If you have questions about specific files let know.
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