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<div><br></div><div><br></div><div><br></div><div>Aug 6, 2021, 14:51 by colin.smale@xs4all.nl:<br></div><blockquote class="tutanota_quote" style="border-left: 1px solid #93A3B8; padding-left: 10px; margin-left: 5px;"><blockquote type="cite"><div>On 08/06/2021 1:52 PM Andy Townsend <ajt1047@gmail.com> wrote:<br></div><div><br></div><div><br></div><div class="">On 06/08/2021 12:26, Colin Smale wrote: <br></div><blockquote type="cite"><div class="">There cannot be more than one "authoritative source" by definition.<br></div></blockquote><p>Sure there can. We have lots of places in OSM (including international borders) where authoritative sources conflict. It's enough of a problem that the OSMF has a policy specifically for it: <a class="" href="https://wiki.osmfoundation.org/w/images/d/d8/DisputedTerritoriesInformation.pdf" rel="noopener noreferrer" target="_blank">https://wiki.osmfoundation.org/w/images/d/d8/DisputedTerritoriesInformation.pdf</a> .<br></p></blockquote><div class="">Got me there, Andy. The United Nations could be used as an authoritative source, but I think even they acknowledge disputed areas. But I admit I struggle to think of any other examples.<br></div></blockquote><div dir="auto">actual examples (outside UK, hopefully it is OK):<br></div><div dir="auto"><br></div><div dir="auto">- <a href="https://www.openstreetmap.org/user/ke9tv/diary/391486">https://www.openstreetmap.org/user/ke9tv/diary/391486</a><br></div><div dir="auto"><a href="https://www.openstreetmap.org/user/ke9tv/diary/42951">- https://www.openstreetmap.org/user/ke9tv/diary/42951</a><br></div><div dir="auto">- self contradictory address database (official Polish government database with the same <br></div><div dir="auto">address appearing several times close to each other - fixed after report from OSM mapper)<br></div><div dir="auto">- self contradictory address database - location and postcode mismatching (as above)<br></div><div dir="auto">- self contradictory address database - location and assigned town mismatching (as above)<br></div><div dir="auto">- conflicting interpretation of borders in documents/databases of local government,</div><div dir="auto">military, nature protection agency (AKA is given area in nature reserve or not)<br></div><div dir="auto">- mismatch between maps/databases of the same agency, OCR errors, transcription<br></div><div dir="auto">errors resulting in the supposedly equivalent data not being equivalent<br></div><div dir="auto">- assigned unique ids not being unique, resulting in various conflicts<br></div><div dir="auto">- conflict in interpretation of the authoritative source that is ambigous<br></div><div dir="auto">- different entities claiming to be authoritative or being authoritative<br></div> </body>
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