Hi Olaf, you could bind the dates such that they can be used as the color layer for the dots on the map: https://tinyurl.com/y9yb6blb . This way, they are sorted in time, and you can clock your way through by looking at which dots appear or change their colour. I also looked into getting the dots connected in some way but no luck there yet. Best, Daniel On Wed, Jan 26, 2022 at 6:12 PM Olaf Simons <olaf.simons(a)pierre-marteau.com> wrote:

The real problem is how to order the events in the query according to their dates in order to draw the line from one event place to the next event place. It is clearly not easy. Best, Bruno Le 27/01/2022 à 14:04, James Heald a écrit : > You're looking for a query like this one, I think > > https://w.wiki/4kW4 > > but adapted to your data. > > All best, > >   James. > > > On 26/01/2022 23:20, Daniel Mietchen via Wikidata wrote: >> Hi Olaf, >> you could bind the dates such that they can be used as the color >> layer for >> the dots on the map: https://tinyurl.com/y9yb6blb . This way, they are >> sorted in time, and you can clock your way through by looking at >> which dots >> appear or change their colour. >> I also looked into getting the dots connected in some way but no luck >> there >> yet. >> Best, >> Daniel >> >> On Wed, Jan 26, 2022 at 6:12 PM Olaf Simons >> &lt;olaf.simons(a)pierre-marteau.com&gt; >> wrote: >> >>> Hi Haddad, >>> >>> I remain puzzled by the railway network - this is too bright for me. >>> This >>> search produces a person, and a series of events in chronological >>> sequence >>> >>> https://tinyurl.com/ya85ymss >>> >>> I have no problem to get the places as dots on a map >>> >>> https://tinyurl.com/y997e8bc >>> >>> but that's not telling me how he moved... I hoped there is a nice >>> command >>> like bind these as sorted... >>> >>> Best, >>> Olaf >>> >>> >>> >>> >>> >>> >>> >>>> Haddad, TC &lt;haddadt(a)oregonstate.edu&gt; hat am 26.01.2022 17:29 >>> geschrieben: >>>> >>>> >>>> to join a list of points into lines, you can use LineString or >>>> MultiLineString formats: >>>> https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry >>>> >>>> >>>> presumably you would sort the points chronologically before >>>> grouping them >>>> this way to get the shape you are expecting. >>>> >>>> On Wed, Jan 26, 2022 at 4:55 AM Olaf Simons < >>> olaf.simons(a)pierre-marteau.com&gt; >>>> wrote: >>>> >>>>> [This email originated from outside of OSU. Use caution with links >>>>> and >>>>> attachments.] >>>>> >>>>> Dear all, >>>>> >>>>> a colleague has put data on FactGrid on a group of people travelling >>>>> though early 18th-century Europe. I wonder how I could connect the >>>>> geographic coordinates in their chronological order. >>>>> >>>>> This is the table that has the order >>>>> >>>>> https://tinyurl.com/ycrumyvb >>>>> >>>>> could somone show me how I connect the dots? >>>>> >>>>> much obliged, >>>>> Olaf >>>>> >>>>> >>>>> >>>>> Dr. Olaf Simons >>>>> Forschungszentrum Gotha der Universität Erfurt >>>>> Am Schlossberg 2 >>>>> 99867 Gotha >>>>> Büro: +49-361-737-1722 >>>>> Mobil: +49-179-5196880 >>>>> Privat: Hauptmarkt 17b/ 99867 Gotha >>>>> _______________________________________________ >>>>> Wikidata mailing list -- wikidata(a)lists.wikimedia.org >>>>> To unsubscribe send an email to wikidata-leave(a)lists.wikimedia.org >>>>> >>>> _______________________________________________ >>>> Wikidata mailing list -- wikidata(a)lists.wikimedia.org >>>> To unsubscribe send an email to wikidata-leave(a)lists.wikimedia.org >>> >>> Dr. Olaf Simons >>> Forschungszentrum Gotha der Universität Erfurt >>> Am Schlossberg 2 >>> 99867 Gotha >>> Büro: +49-361-737-1722 >>> Mobil: +49-179-5196880 >>> Privat: Hauptmarkt 17b/ 99867 Gotha >>> _______________________________________________ >>> Wikidata mailing list -- wikidata(a)lists.wikimedia.org >>> To unsubscribe send an email to wikidata-leave(a)lists.wikimedia.org >>> >> >> >> _______________________________________________ >> Wikidata mailing list -- wikidata(a)lists.wikimedia.org >> To unsubscribe send an email to wikidata-leave(a)lists.wikimedia.org > _______________________________________________ > Wikidata mailing list -- wikidata(a)lists.wikimedia.org > To unsubscribe send an email to wikidata-leave(a)lists.wikimedia.org

You need to have the events put in chronological order inside the database. It is not the case in the Olaf's problem because the dates come from different pages. Bruno Le 27/01/2022 à 14:48, James Heald a écrit : > Agreed. I don't think it's guaranteed that the GROUP_CONCAT will > respect the order of items it's given.  (I believe this is a standing > well-known requested feature in SPARQL circles). > > But yet, it seems to work. > > eg here's a version of the previous query, sorted by longitude >    https://w.wiki/4kXS > and the points *do* seem to be being joined together in the right order. > >   --  J. > > > On 27/01/2022 13:39, Bruno BELHOSTE wrote: >> The real problem is how to order the events in the query according to >> their dates in order to draw the line from one event place to the >> next event place. >> >> It is clearly not easy. >> >> Best, >> >> Bruno >> >> Le 27/01/2022 à 14:04, James Heald a écrit : >>> You're looking for a query like this one, I think >>> >>> https://w.wiki/4kW4 >>> >>> but adapted to your data. >>> >>> All best, >>> >>>   James. >>> >>> > _______________________________________________ > Wikidata mailing list -- wikidata(a)lists.wikimedia.org > To unsubscribe send an email to wikidata-leave(a)lists.wikimedia.org

Apologies in advance, as my knowledge is more on the geospatial side than on the SPARQL side, so I am interested if there is a solution as well. Geospatially speaking, order can be preserved if the chronologically sorted points returned can be converted to a LineString before display. Looking into the topic, it seems that for this to be supported you might need to support GeoSPARQL extensions. https://opengeospatial.github.io/ogc-geosparql/geosparql11/spec.html The only reference I could find to a function for this conversion from points--> LineString was in these docs: https://graphdb.ontotext.com/documentation/standard/sparql-functions-refere… in which there is a reference to a GeoSPARQL extension function that could be of use: shortestLine(geomLiteral g1, geomLiteral g2) This appears to only create individual line segments between 2 points at a time, but it is a start. LineStrings can be arbitrarily long, however, so using 2 points is just the bare bones of functionality. A function that accepts an ordered list of points would be more ideal. Geospatially speaking, individual line segments can also be grouped together as MultiLineStrings, which would allow you to join multiple journeys together (useful for e.g. taking one long train journey and connecting to a second train line midway). Other docs that seem to mention support for LineStrings or MultiLineStrings if useful: https://docs.cambridgesemantics.com/anzograph/v2.3/userdoc/geo-spatial.htm https://jena.apache.org/documentation/geosparql/ On Thu, Jan 27, 2022 at 5:49 AM James Heald &lt;jpm.heald(a)gmail.com&gt; wrote: