RE: How can I declare that the coordinates I publish are only approximations?


That’s a fair point. I did ask a colleague who is more of a GML expert than me if there was a way to express significant figures in GML. She wasn’t aware of a way.



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From: Frans Knibbe | Geodan []
Sent: 27 September 2013 09:12
Subject: Re: How can I declare that the coordinates I publish are only approximations?

Hello Lars,

Aren't all coordinates in geographical data sets approximations?

I think the right thing to do is to use the appropriate amount of significant digits<> for the coordinates. Is it possible for you to quantify the amount of approximation?


On 12-9-2013 13:16, Svensson, Lars wrote:


A few months ago I asked for advice on how to represent coordinates for maps and got very valuable insights. Now I have a related question: When libraries and archives digitise historic maps they also create metadata for them, including a best-effort attempt to determine the map's geographic coverage. It goes without saying that the determined coordinates are mere approximations. When we publish that data in RDF, is there a way to express in geosparql (or WKT) that the specified coordinates are only approximations? I looked in the geosparql vocabulary and WKT but could not find any information.

Thanks in advance,


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Received on Monday, 30 September 2013 12:08:43 UTC