[OHM] Historic Digest, Vol 10, Issue 6

[Brad Thompson]

Marcus -

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.

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.

Brad


On Sun, May 19, 2013 at 2:00 AM, <historic-request at openstreetmap.org> wrote:

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> Today's Topics:
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>    1. copy old buildings from OSM into OHM (Marcus Koenig)
>    2. Re: copy old buildings from OSM into OHM (Richard Welty)
>    3. Re: copy old buildings from OSM into OHM (Marcus Koenig)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 18 May 2013 13:56:58 +0000
> From: Marcus Koenig <einschmelzer at hotmail.com>
> To: "historic at openstreetmap.org" <historic at openstreetmap.org>
> Subject: [OHM] copy old buildings from OSM into OHM
> Message-ID: <DUB113-W1319E6942308C9BD2152E5DCAD0 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hello,
>
> does anyone know an easy way to copy data of historic buildings that still
> exist from the OSM into OHM ?
>
> Thanks a lot.
>
> Marcus K?nig
>
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> Message: 2
> Date: Sat, 18 May 2013 10:08:06 -0400
> From: Richard Welty <rwelty at averillpark.net>
> To: historic at openstreetmap.org
> Subject: Re: [OHM] copy old buildings from OSM into OHM
> Message-ID: <51978B45.6070501 at averillpark.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> On 5/18/13 9:56 AM, Marcus Koenig wrote:
>
>    does anyone know an easy way to copy data of historic buildings that
> still exist from the OSM into OHM ?
>
> it shouldn't be hard to do an extract via one of the apis and then load
> it up into josm.
>
> but is this something we should do?
>
> richard
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Sun, 19 May 2013 09:58:57 +0000
> From: Marcus Koenig <einschmelzer at hotmail.com>
> To: "historic at openstreetmap.org" <historic at openstreetmap.org>
> Subject: Re: [OHM] copy old buildings from OSM into OHM
> Message-ID: <DUB113-W1325E22F1A59586228D22EADCAE0 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
>
> > Date: Sat, 18 May 2013 10:08:06 -0400
> > From: rwelty at averillpark.net
> > To: historic at openstreetmap.org
> > Subject: Re: [OHM] copy old buildings from OSM into OHM
> >
> > On 5/18/13 9:56 AM, Marcus Koenig wrote:
> >
> >    does anyone know an easy way to copy data of historic buildings that
> > still exist from the OSM into OHM ?
> >
> > it shouldn't be hard to do an extract via one of the apis and then load
> > it up into josm.
> >
> > but is this something we should do?
>
> 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.
>
>
> Marcus K?nig
>
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