<div dir="ltr">Hi y'all,<div><br></div><div>I just wanted to mention my import processing of the LINZ rivers into OSM. </div><div><br></div><div>As Andrew mentioned related to the Mackenzie area, a direct/automated import is not practical and just causes a great deal of mess. Some time ago, I was working on improving the OSM river network by iteratively importing river sections from LINZ into JOSM and making the edits and corrections in JOSM before importing them into OSM. With a little bit of preprocessing in Python, the LINZ rivers didn't take too much work in JOSM to efficiently import rivers into OSM. </div><div><br></div><div>I really should get back to doing this again...because I really really like using OSM's river network and API for my hydrological analysis. It's much better than any other existing rivers layer for network analysis and routing.</div><div><br></div><div>If anyone is interested in a more detailed river import procedure, I'd be happy to provide it.</div><div><br></div><div>Take care,</div><div>Mike</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Aug 22, 2021 at 1:23 PM Andrew Douglas-Clifford <<a href="mailto:adouglasclifford@gmail.com">adouglasclifford@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr">Hi Kyle,<div><br></div><div>Thanks for putting together the details on this. I haven't been involved in some of the older LINZ imports (only the recent building imports via RapiD), but I have seen the results of various older imports.</div><div><br></div><div>I think it might be useful to classify datasets by <i>how</i> they should be imported into OSM. Many of these seem simple enough via a bulk import, while others will require varying degrees of review/modification as they are imported (as some of your notes indicate). For these, that might mean taking the approach of importing/reviewing manually via RapiD instead of the previous methods used, to ensure it's done appropriately.</div><div><br></div><div>Some thoughts around specific datasets:</div><div><ul><li><b>Rivers</b>: I believe this may be quite complicated for a simple bulk import. I've seen somebody's previous messy import examples (e.g. Mackenzie District around the Tekapo area) that have taken some work to clean up, where the large multitudes of line segments have an incorrect direction, meaning the flow direction is topologically incorrect. Also, river lines do not always have a continuous path through wider bodies of water. Perhaps with the named rivers dataset imported pre-dissolved and with the correct direction will help with this - but this will need manual review, perhaps by catchment?</li><li><b>Peaks/Height Points/Place Names: </b>There are quite a few peaks/place names added already, assume the import will only add those that are missing from OSM? I also made an effort to add the geographic LINZ place names (town through to locality) that weren't in OSM previously, so imports would obviously need to conflate with existing data. Don't see why all height points couldn't be imported though, given the use of OSM for many outdoor applications.</li></ul></div><div><br></div><div>Cheers,<br clear="all"><div><div dir="ltr"><div dir="ltr"><br>Andrew</div></div></div>andrew_dc</div><div><div dir="ltr"><div dir="ltr"><br></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Aug 21, 2021 at 9:20 PM Kyle Hensel <<a href="mailto:K.y.l.e@outlook.co.nz" target="_blank">K.y.l.e@outlook.co.nz</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="EN-NZ">
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<p class="MsoNormal"><span lang="mi-NZ">Hi all, I hope everyone is safe during lockdown...<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="mi-NZ"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="mi-NZ">I've noticed that the import of topographic data from LINZ was never completed. This took place between 2008 and 2014. During this time, the majority of topographic data from LINZ was imported into OSM. Since 2014, only
addresses and building outlines have been/are being imported.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="mi-NZ"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="mi-NZ">I've put together a proposal to continue importing 41 of the remaining data layers from LINZ.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="mi-NZ"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="mi-NZ">I've updated the OSM Wiki page to provide an overview of what data is and isn't in OSM, and the OSM tags used for each layer.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="mi-NZ">This is available here: <a href="https://wiki.osm.org/LINZ" target="_blank">https://wiki.osm.org/LINZ</a> The proposed new layers are marked as "</span><span lang="mi-NZ" style="font-family:"Segoe UI Emoji",sans-serif">🔵</span><span lang="mi-NZ"> Ready to Import" in the table.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="mi-NZ"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="mi-NZ">I'd love to hear what everyone thinks about this proposal.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="mi-NZ">In particular, the proposed OSM tags for the new layers are just a suggestion - some of the choices are not straightforward and definitely need discussion.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="mi-NZ"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="mi-NZ">Best regards,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="mi-NZ">Kyle</span></p>
<p class="MsoNormal"><u></u> <u></u></p>
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