<div dir="ltr">Marcus -<div><br></div><div>This is a great idea, and a method that I've been tinkering with for a few months now. My test dataset has been San Francisco, because construction date information is generally (although not universally) available for buildings in SF. The logic is that if we start with building shapes from today, each with a construction date associated with it, then we can reconstruct partial versions of earlier years, leaving only previously-demolished buildings (and/or alterations) to verify and draw (in urban areas, these would become obvious as they'd show up in older time views as empty spaces between known buildings). In theory, it's a great start, and as you say, it saves a lot of work.</div>
<div><br></div><div style>I've been trying to build a demo of this with SF data, but it's been more time-consuming than I imagined. I haven't been able to create a useable demo yet, because I've encountered some problems with my building outlines, as well as some unreliable construction date information. If anyone would be interested in taking the data I've collected, I'd love to share it. There should be something here that will be useful for OHM.</div>
<div style><br></div><div style>Brad</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Sun, May 19, 2013 at 2:00 AM, <span dir="ltr"><<a href="mailto:historic-request@openstreetmap.org" target="_blank">historic-request@openstreetmap.org</a>></span> wrote:<br>
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Today's Topics:<br>
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1. copy old buildings from OSM into OHM (Marcus Koenig)<br>
2. Re: copy old buildings from OSM into OHM (Richard Welty)<br>
3. Re: copy old buildings from OSM into OHM (Marcus Koenig)<br>
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Message: 1<br>
Date: Sat, 18 May 2013 13:56:58 +0000<br>
From: Marcus Koenig <<a href="mailto:einschmelzer@hotmail.com">einschmelzer@hotmail.com</a>><br>
To: "<a href="mailto:historic@openstreetmap.org">historic@openstreetmap.org</a>" <<a href="mailto:historic@openstreetmap.org">historic@openstreetmap.org</a>><br>
Subject: [OHM] copy old buildings from OSM into OHM<br>
Message-ID: <DUB113-W1319E6942308C9BD2152E5DCAD0@phx.gbl><br>
Content-Type: text/plain; charset="iso-8859-1"<br>
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Hello,<br>
<br>
does anyone know an easy way to copy data of historic buildings that still exist from the OSM into OHM ?<br>
<br>
Thanks a lot.<br>
<br>
Marcus K?nig<br>
<br>
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Message: 2<br>
Date: Sat, 18 May 2013 10:08:06 -0400<br>
From: Richard Welty <<a href="mailto:rwelty@averillpark.net">rwelty@averillpark.net</a>><br>
To: <a href="mailto:historic@openstreetmap.org">historic@openstreetmap.org</a><br>
Subject: Re: [OHM] copy old buildings from OSM into OHM<br>
Message-ID: <<a href="mailto:51978B45.6070501@averillpark.net">51978B45.6070501@averillpark.net</a>><br>
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On 5/18/13 9:56 AM, Marcus Koenig wrote:<br>
<br>
does anyone know an easy way to copy data of historic buildings that<br>
still exist from the OSM into OHM ?<br>
<br>
it shouldn't be hard to do an extract via one of the apis and then load<br>
it up into josm.<br>
<br>
but is this something we should do?<br>
<br>
richard<br>
<br>
<br>
<br>
<br>
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<br>
Message: 3<br>
Date: Sun, 19 May 2013 09:58:57 +0000<br>
From: Marcus Koenig <<a href="mailto:einschmelzer@hotmail.com">einschmelzer@hotmail.com</a>><br>
To: "<a href="mailto:historic@openstreetmap.org">historic@openstreetmap.org</a>" <<a href="mailto:historic@openstreetmap.org">historic@openstreetmap.org</a>><br>
Subject: Re: [OHM] copy old buildings from OSM into OHM<br>
Message-ID: <DUB113-W1325E22F1A59586228D22EADCAE0@phx.gbl><br>
Content-Type: text/plain; charset="iso-8859-1"<br>
<br>
<br>
<br>
> Date: Sat, 18 May 2013 10:08:06 -0400<br>
> From: <a href="mailto:rwelty@averillpark.net">rwelty@averillpark.net</a><br>
> To: <a href="mailto:historic@openstreetmap.org">historic@openstreetmap.org</a><br>
> Subject: Re: [OHM] copy old buildings from OSM into OHM<br>
><br>
> On 5/18/13 9:56 AM, Marcus Koenig wrote:<br>
><br>
> does anyone know an easy way to copy data of historic buildings that<br>
> still exist from the OSM into OHM ?<br>
><br>
> it shouldn't be hard to do an extract via one of the apis and then load<br>
> it up into josm.<br>
><br>
> but is this something we should do?<br>
<br>
Why shouldn't we? Are there any reasons that speak against it? If we try to create city maps for a certain point in history, we don't have to draw existing buildings again.<br>
<br>
<br>
Marcus K?nig<br>
<br>
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