<div dir="ltr">Hi Mark,<div><br></div><div>Yes, you replied correctly to the mail list. Thank you for the feedback, glad you're finding the RapiD tool useful.</div><div><br></div><div>I have been intermittently working away at Auckland central building outlines. My approach is to use two different imagery layers I switch between (shortcut Ctrl+B to toggle layers) which help me assess and refine the building outlines as I add them:</div><div><b>2017 high resolution aerial from LINZ</b>: this is the imagery that the building outlines were generated from, in Auckland. This layer helps me pick up the occasional false positive outlines where there are (for example) shade sails and patios which were classified as buildings.</div><div><b>Recent 2021 Maxar imagery, low resolution</b>: This layer is helpful to identify buildings which have been demolished since 2017, and new buildings which I manually draw in.</div><div></div><div><br class="gmail-Apple-interchange-newline"><span style="color:rgb(0,0,0)">> It seems the data set already has exsiting buildings (which would be duplicated) removed from the RapiD layer - is that the case?</span><br></div><div><br></div><div>Correct, this filtering happens on-the-fly, as the data is brought into RapiD (those building outlines still exist in the <a href="https://www.arcgis.com/home/webmap/viewer.html?useExisting=1&layers=ef9136b079e24bbfb432be9bbdd246ff">underlying dataset</a>). I like this approach, though I am occasionally frustrated when a block of very roughly sketched buildings prevents the LINZ outlines from showing.</div><div><br></div><div>For those interested, I updated the <a href="https://wiki.openstreetmap.org/wiki/Import/New_Zealand_Buildings">import wiki page</a> with a link to this <a href="https://osmcha.org/filters?aoi=155a8e14-714e-4f33-bcc4-8bc77fbd970d">OSMCha filter</a>, which is a way to inspect how other contributors are importing the dataset.</div><div><br></div><div>Cheers,</div><div>Tim</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Aug 16, 2021 at 9:52 PM Mark Begbie <<a href="mailto:mark@begbie.org">mark@begbie.org</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"><u></u>
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Apologies if this ends up in the wrong place - not used email lists in a long time and not sure I'm replying the right way...
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Thanks to all the folk who've put in work to make the LINZ building outlines available. I've just come across this, along with RapiD and the MapWithAI plugin for JOSM today. I've had a quick go with RapiD (two imports) on buildings in Papamoa and based on that, I agree with the earlier comment "My suggestion is for the former: *Make the building outlines available on Rapid for mappers to use ad-hoc as they wish*." The outlines need some editing in many cases, so a bulk import would be risky.
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It seems the data set already has exsiting buildings (which would be duplicated) removed from the RapiD layer - is that the case?
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Anyway, thanks for this, happy to start using this approach (it makes things faster) and also looking forward to getting more involved with the community.
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Best,
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<br>Mark
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