<html><head></head><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:13px"><div id="yui_3_16_0_1_1498827272885_4970">Jochen <br></div><div id="yui_3_16_0_1_1498827272885_4971"><br></div><div dir="ltr" id="yui_3_16_0_1_1498827272885_4972">cela ressemble a des menaces. Bon, il y a de meilleures façons de motiver les communautés locales.</div><div dir="ltr" id="yui_3_16_0_1_1498827272885_4973"><br></div><div dir="ltr" id="yui_3_16_0_1_1498827272885_4979">Bonne journée<br></div><div id="yui_3_16_0_1_1498827272885_4980"><span></span></div><div id="yui_3_16_0_1_1498827272885_4981"> </div><div class="signature" id="yui_3_16_0_1_1498827272885_4982"><span style="font-style:italic;color:rgb(0, 0, 191);font-weight:bold;"> <br><font face="garamond, new york, times, serif">Pierre </font><br></span></div><div class="qtdSeparateBR" id="yui_3_16_0_1_1498827272885_4983"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_1_1498827272885_4987" style="display: block;"> <div style="font-family: verdana, helvetica, sans-serif; font-size: 13px;" id="yui_3_16_0_1_1498827272885_4986"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, linéale; font-size: 16px;" id="yui_3_16_0_1_1498827272885_4985"> <div dir="ltr" id="yui_3_16_0_1_1498827272885_4984"> <font id="yui_3_16_0_1_1498827272885_4990" face="Arial" size="2"> <hr size="1"> <b><span style="font-weight:bold;">De :</span></b> Jochen Topf <jochen@remote.org><br> <b><span style="font-weight: bold;">À :</span></b> talk-ca@openstreetmap.org <br> <b><span style="font-weight: bold;">Envoyé le :</span></b> vendredi 30 juin 2017 3h53<br> <b><span style="font-weight: bold;">Objet :</span></b> Re: [Talk-ca] Multipolygon problems<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1498827272885_4991"><br>Hi!<br clear="none"><br clear="none">A week ago I wrote this email and nobody answered it yet. Does that<br clear="none">mean that nobody feels responsible for the import that created this data<br clear="none">and nobody here cares for this data?<br clear="none"><br clear="none">I see three ways forward:<br clear="none">* We do nothing. The broken data stays in OSM. Not a good solution,<br clear="none"> because every user of the data has to work around this or handle the<br clear="none"> complaints.<br clear="none">* The Canadian community steps up and fixes the data, automatically or<br clear="none"> manually.<br clear="none">* We ask the Data Working Group to remove the broken import.<br clear="none"><br clear="none">Jochen<br clear="none"><br clear="none">On Thu, Jun 22, 2017 at 11:38:15AM +0200, Jochen Topf wrote:<br clear="none">> Date: Thu, 22 Jun 2017 11:38:15 +0200<br clear="none">> From: Jochen Topf <<a shape="rect" ymailto="mailto:jochen@remote.org" href="mailto:jochen@remote.org">jochen@remote.org</a>><br clear="none">> To: <a shape="rect" ymailto="mailto:talk-ca@openstreetmap.org" href="mailto:talk-ca@openstreetmap.org">talk-ca@openstreetmap.org</a><br clear="none">> Subject: [Talk-ca] Multipolygon problems<br clear="none">> <br clear="none">> Hi!<br clear="none">> <br clear="none">> In the last days the OpenStreetMap Carto Style 4.0 is being deployed on<br clear="none">> the OSMF tile servers. This new version of the style doesn't take<br clear="none">> old-style multipolygons (where the tags are on the outer ways instead of<br clear="none">> on the relation) into account any more. In a huge effort in the last<br clear="none">> months we have converted all old-style multipolygons to the modern<br clear="none">> tagging, so this is a good step!<br clear="none">> <br clear="none">> Unfortunately, as a side-effect of this change, many multipolygon<br clear="none">> relations now appear wrong on the map. This is the case for multipolygon<br clear="none">> relations that have the same tags on the relation as well as on (some of<br clear="none">> the) outer or inner ways. This is *wrong* tagging, and needs to be<br clear="none">> fixed. (Note that this always was wrong tagging, even before we<br clear="none">> deprecated old-style multipolygons, but the way the software worked with<br clear="none">> old-style multipolygons, this problem was not visible on the map. But<br clear="none">> now it is.)<br clear="none">> <br clear="none">> Here is an example: <a shape="rect" href="http://www.openstreetmap.org/relation/1330741" target="_blank">http://www.openstreetmap.org/relation/1330741 </a>. As<br clear="none">> you can see (unless somebody fixes this :-) the clearing in the forest<br clear="none">> that should just have grass, also has tree symbols on it. In many other<br clear="none">> cases it is not this obvious, there are just islands in a river missing<br clear="none">> or so.<br clear="none">> <br clear="none">> There are about 50,000 cases like this worldwide, forests, waterways,<br clear="none">> all sorts of areas. But the worst problem is in Canada. There are about<br clear="none">> 15,000 affected relations, most from the CanVec imports.<br clear="none">> <br clear="none">> First, we have to make sure that there are no further imports of broken<br clear="none">> data. I hope the people who have done those imports (and might still<br clear="none">> continue) are here on this mailing list. If not please make them aware<br clear="none">> of this issue and/or put me in touch with them. Second, somebody needs<br clear="none">> to clean up the broken data, either automatically or manually. 99% of<br clear="none">> the data has not been changed since the import, so it might be feasible<br clear="none">> to do an automatic cleanup, but somebody has to do this. Otherwise we'll<br clear="none">> have to do a manual cleanup, through tools such as Maproulette and the<br clear="none">> OSM Inspector. I am currently in the process of creating Maproulette<br clear="none">> challenges for other areas of the planet, but will not do this for<br clear="none">> Canada at this time. Lets discuss this here first.<br clear="none">> <br clear="none">> I can provide OSM data extracts, statistics, etc. if somebody wants to<br clear="none">> look at the data.<br clear="none">> <br clear="none">> All of this is part of a larger effort to fix areas in OSM. See<br clear="none">> <a shape="rect" href="http://area.jochentopf.com/" target="_blank">http://area.jochentopf.com/ </a>for more information. There is also a thread<br clear="none">> on the talk mailinglist at<br clear="none">> <a shape="rect" href="https://lists.openstreetmap.org/pipermail/talk/2017-June/078203.html" target="_blank">https://lists.openstreetmap.org/pipermail/talk/2017-June/078203.html </a><br clear="none">> and this issue<br clear="none">> <a shape="rect" href="https://github.com/osmlab/fixing-polygons-in-osm/issues/36" target="_blank">https://github.com/osmlab/fixing-polygons-in-osm/issues/36 </a>.<br clear="none">> News of the effort are posted regularly to<br clear="none">> <a shape="rect" href="https://github.com/osmlab/fixing-polygons-in-osm/issues/15" target="_blank">https://github.com/osmlab/fixing-polygons-in-osm/issues/15 </a>.<br clear="none">> <br clear="none">> Jochen<br clear="none">> -- <br clear="none">> Jochen Topf <a shape="rect" ymailto="mailto:jochen@remote.org" href="mailto:jochen@remote.org">jochen@remote.org</a> <a shape="rect" href="https://www.jochentopf.com/" target="_blank">https://www.jochentopf.com/ </a> +49-351-31778688<br clear="none">> <br clear="none">> _______________________________________________<br clear="none">> Talk-ca mailing list<br clear="none">> <a shape="rect" ymailto="mailto:Talk-ca@openstreetmap.org" href="mailto:Talk-ca@openstreetmap.org">Talk-ca@openstreetmap.org</a><br clear="none">> <a shape="rect" href="https://lists.openstreetmap.org/listinfo/talk-ca" target="_blank">https://lists.openstreetmap.org/listinfo/talk-ca</a><div class="yqt6013910372" id="yqtfd46441"><br clear="none"><br clear="none">-- <br clear="none">Jochen Topf <a shape="rect" ymailto="mailto:jochen@remote.org" href="mailto:jochen@remote.org">jochen@remote.org</a> <a shape="rect" href="https://www.jochentopf.com/" target="_blank">https://www.jochentopf.com/ </a> +49-351-31778688<br clear="none"><br clear="none">_______________________________________________<br clear="none">Talk-ca mailing list<br clear="none"><a shape="rect" ymailto="mailto:Talk-ca@openstreetmap.org" href="mailto:Talk-ca@openstreetmap.org">Talk-ca@openstreetmap.org</a><br clear="none"><a shape="rect" href="https://lists.openstreetmap.org/listinfo/talk-ca" target="_blank">https://lists.openstreetmap.org/listinfo/talk-ca</a><br clear="none"></div><br><br></div> </div> </div> </div></div></body></html>