- From: Frans Knibbe | Geodan <frans.knibbe@geodan.nl>
- Date: Fri, 27 Sep 2013 10:12:25 +0200
- To: public-geosemweb@w3.org
- Message-ID: <52453DE9.3040906@geodan.nl>
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 <http://en.wikipedia.org/wiki/Significant_figures> for the coordinates. Is it possible for you to quantify the amount of approximation? Regards, Frans On 12-9-2013 13:16, Svensson, Lars wrote: > All, > > 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, > > Lars -------------------------------------- *Geodan* President Kennedylaan 1 1079 MB Amsterdam (NL) T +31 (0)20 - 5711 347 E frans.knibbe@geodan.nl www.geodan.nl <http://www.geodan.nl> | disclaimer <http://www.geodan.nl/disclaimer> --------------------------------------
Received on Friday, 27 September 2013 08:12:58 UTC