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. From: The Museum System (TMS) Users [mailto:[log in to unmask]] On Behalf Of Shepherd, Rupert Sent: 2017-08-23 10:42 AM To: [log in to unmask] Subject: Re: Adding VIAF and other linked data references to Constituents 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 Rupert Shepherd, PhD FSA Collection Information Manager [log in to unmask]<mailto:[log in to unmask]> Tel: +44 (0)20 7747 5921 From: The Museum System (TMS) Users [mailto:[log in to unmask]] On Behalf Of Brad Millen Sent: 23 August 2017 15:26 To: [log in to unmask]<mailto:[log in to unmask]> Subject: Re: Adding VIAF and other linked data references to Constituents 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]<mailto:[log in to unmask]> Subject: Re: Adding VIAF and other linked data references to Constituents I think that sounds great. And while we're at it, every table describing a physical location should have a field for geo coordinates. I've had to commandeer the Remarks field for over 200,000 constituent addresses<http://pic.nypl.org/map/?address.AddressTypeID=*&address.CountryID=*&bbox=*&Nationality=*&gender.TermID=*&process.TermID=*&role.TermID=*&format.TermID=*&biography.TermID=*&collection.TermID=*&DisplayName=*&Date=*&mode=2>. To unsubscribe, send an email to [log in to unmask]<mailto:[log in to unmask]> with the following commands in the body of the email: signoff TMSUSERS // eoj You will receive a confirmation that your subscription has been removed. [Out of the Depths: The Blue Whale Story. Du fond des mers: La baleine bleue]<https://www.rom.on.ca/blue-whale> The ROM gratefully acknowledges the financial support of the Ontario Government for this Ontario150 initiative. Le ROM tient à remercier le gouvernement de l’Ontario du soutien financier qu’il apporte à cette initiative du Musée à l’occasion d’Ontario150. To unsubscribe, send an email to [log in to unmask] with the following commands in the body of the email: signoff TMSUSERS // eoj You will receive a confirmation that your subscription has been removed.