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    <div class="moz-cite-prefix">On 10/01/19 13:54, Graeme Fitzpatrick
      wrote:<br>
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          <div dir="ltr">On Thu, 10 Jan 2019 at 12:43, John Willis <<a
              href="mailto:johnw@mac.com" moz-do-not-send="true">johnw@mac.com</a>>
            wrote:<br>
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            <div style="overflow-wrap: break-word;">I am tracing and
              repairing existing traces of warehouses in an industrial
              district. </div>
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          <div>I've recently been doing the same, John.</div>
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              <div>if I am mapping this kind of warehouses, which should
                I:<br>
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              <div>- map the whole structure as a warehouse</div>
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            <div>I've just traced what I can see as the visible roof
              area &  called it "building", as it's impossible to
              tell from an overhead image what is enclosed building
              & what is only a roof over an open area?</div>
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            <div>If you had street-level imagery that may change things?</div>
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    As Graeme says - you cannot tell from satellite imagery.<br>
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    building=yes on the whole lot of it. Maybe add a "note=warehouse?
    and part building=roof, layer=1"?<br>
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              <div>I am going to spend the time cleaning up
                UltimaSnorlax’s bad polygons, I might a well draw them
                correctly the first time. <br>
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          <div>Yep! :-) <br>
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    Or try to get UltimaSnorlax to fix them?<br>
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