Hi:

 

Yes, use a field for Geodetic Datum.

 

You can use this website to convert coordinates and Datum http://tool-online.com/en/coordinate-converter.php#

 

I had a bird nest from Southampton Island in Hudson Bay. A land bird that plotted in water in the Bay. The supplier of data using a GPS unit had it set completely wrong. Once converted it plotted on the island.

 

 

 

 

Brad, thanks – useful to know. So any occurrence of geographic coordinates in TMS should ideally be accompanied by a field in which to specify the Geodetic Datum used? Would I be right in thinking that, if the Geodetic Datum is known, coordinates could be recalculated to match other Geodetic Data?

 

Best wishes

 

Rupert

 

 

 

Hi:

 

Be aware of limitations using Geographic coordinates for locations. All coordinates must have a Geodetic Datum. If not, you get what is called “Datum Shift”. A NAD27 Decimal Latitude is slightly different than a NAD83 or even a WGS84. You can correct this but a lat and long may not plot properly for an address if a NAD83 is used on Google Maps, which is WGS84. A street address may be a block away and the distance from the equator will make that shift worse.

 

 

 

 

From: The Museum System (TMS) Users [mailto:[log in to unmask]] On Behalf Of David Lowe
Sent: 2017-08-23 10:14 AM
To: [log in to unmask]
Subject: Re: Adding VIAF and other linked data references to Constituents

 

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