[Imports] Fwd: Re: Spanish cadastre

Wed Mar 28 16:38:54 UTC 2012

El 28/03/12 11:16, Paul Norman escribió:
>
> The reason I'm asking is because if you later wanted to import more 
> than just highways and leisure=park you'd need to go through the 
> process of consulting again
>
I'm aware of that.
>
> *From:* Carlos Dávila [mailto:cdavilam at orangecorreo.es]
> *Sent:* Wednesday, March 28, 2012 1:42 AM
> *To:* imports at openstreetmap.org
> *Subject:* Re: [Imports] Fwd: Re: Spanish cadastre
>
> El 28/03/12 09:56, Paul Norman escribió:
>
> Reviewing this file, it only contains highway=residential, 
> highway=track, highway=footway, highway=pedestrian and leisure=garden. 
> Are you not proposing to import anything other than streets and gardens?
>
> As it has been said before, cat2osm lets you select what part of the 
> source file from cadastre you want to transform to osm format. As 
> parcels and landuse seem to be very controversial, for this sample 
> data I only transformed highway=* (option -ejes of cat3osm) for "Don 
> Benito" municipality. This municipality has a town and several hamlets 
> and suburbs. The town and some of the hamlets were already mapped, so 
> their import has been discarded. Sample file contains only suburbs and 
> hamlets currently "empty" in OSM.
>
> The accuracy of the roads appears to be good, although potentially 
> dated. The NW cluster of data overlaps with the E-90 which appears in 
> the imagery to have been recently expanded.
>
> Yes, I expanded it while preparing the import. Merging new data with 
> existing ones has not been done, this is the reason for the overlap. 
> This last step will be done before uploading the data. All new ways 
> have to be connected as well with current data where appropriate. If 
> you have a look at the other sample data (Navalvillar.zip), there's a 
> file where this last step is already done (current_osm+cadastre.osm)
>
> I've placed a screenshot of an area up at 
> http://maps.paulnorman.ca/imports/review/spanish_temp1.png
>
> *From:* Carlos Dávila [mailto:cdavilam at orangecorreo.es]
> *Sent:* Wednesday, March 28, 2012 12:00 AM
> *To:* imports at openstreetmap.org <mailto:imports at openstreetmap.org>
> *Cc:* Discusión en Español de OpenStreetMap
> *Subject:* [Imports] Fwd: Re: Spanish cadastre
>
> Some days ago I sent the mail below to the list, but by an error it 
> went only to Paul Norman and the Spanish mailing list. I would like to 
> get feedback from you about the sample data from Spanish Cadastre to 
> be imported [1]. A new sample can be downloaded from [2].
> P.S. FYI, we have written some draft information in English about the 
> import at [3]
> [2] http://mapas.alternativaslibres.es/Don_Benito.zip
> [3] http://wiki.openstreetmap.org/wiki/Spanish_Cadastre_import
>
> -------- Mensaje original --------
>
> *Asunto: *
>
> 	
>
> Re: [Imports] Spanish cadastre
>
> *Fecha: *
>
> 	
>
> Fri, 23 Mar 2012 22:47:17 +0100
>
> *De: *
>
> 	
>
> Carlos Dávila <cdavilam at orangecorreo.es> <mailto:cdavilam at orangecorreo.es>
>
> *Para: *
>
> 	
>
> Paul Norman <penorman at mac.com> <mailto:penorman at mac.com>
>
> *CC: *
>
> 	
>
> Discusión en Español de OpenStreetMap <talk-es at openstreetmap.org> 
> <mailto:talk-es at openstreetmap.org>
>
> El 22/03/12 20:38, Paul Norman escribió:
> >>  From: Carlos Dávila [mailto:cdavilam at orangecorreo.es]
> >>  Sent: Thursday, March 22, 2012 5:28 AM
> >>  To:imports at openstreetmap.org  <mailto:imports at openstreetmap.org>
> >>  Subject: [Imports] Spanish cadastre
> >>  
> >>  This mail is to announce the intention of the Spanish OSM community to
> >>  import data from Spanish Cadastre and get feedback from you.
> >>  The idea of this import arises with the publication of the license and
> >>  access criteria to massive download of data from Spanish Cadastre [1] on
> >>  march 2011, which states: "Public use of cadastrial data is permitted,
> >>  including commercial use, if such data have been previously transformed
> >>  in any way...". Original data is supplied as shapefiles with different
> >>  coordinate reference systems. Reprojecting those shapefiles to EPSG:4326
> >>  and converting to *.osm format is enough transformation to allow
> >>  mentioned public use, according with the reference Spanish "Law of
> >>  intellectual property" [2], as established in its article 21, which also
> >>  says that copyrights of the transformed product belongs to the
> >>  transformer, in this case the (Spanish) OSM community.
> >>  Data from Spanish Cadastre is known to have a high accuracy and include
> >>  a lot of information of interest for OSM project, such as buildings
> >>  (shape, use, height, number of floors, etc.), rural and urban parcels
> >>  land use, most of streets and roads of the country, power stations,
> >>  tracks and paths, trees... Many of this information is currently in OSM,
> >>  mainly ways and roads, but a great part is still missing, specially in
> >>  low populated areas where a ground survey is less likely to be made.
> >>  This import has been largely discussed on Spanish mailing list, with a
> >>  general consensus on the usefulness of the import and a "we must do it"
> >>  agreement.
> >>  Specific software (cat2osm) is being developed [3] to import data, which
> >>  source code is available at Github [4]. It is currently being tested by
> >>  some members of the community to get a stable status. Some images of the
> >>  preliminary results can be seen at [5]. Transformed data is thought to
> >>  be always manually checked in JOSM by osmers knowing the area and only
> >>  after that uploaded. The way original data is translated into osm format
> >>  by cat2osm tool is documented in [6] and has been established with the
> >>  participation of several members of the community.
> >>       
> >  What is your proposed tagging of these objects?
> >  
> >  Cadastre generally have a lot of detailed information, not all of which is
> >  suitable for importing into OSM. Which datasets do you intend to import and
> >  which do you intend to leave out?
> >  
> >     
> >>  Specific accounts have been created for the import, one for each Spanish
> >>  province [7]. There's a member of the Spanish community responsible of
> >>  each province import.
> >>       
> >  What software do you plan to use to conflate with existing OSM data?
> >  How do you intend to upload the data?
> >  Approximately how large will the changesets be?
> >  
> >     
> >>  Looking forward for your comments
> >>  Carlos Dávila
> >>       
> >  I suggest breaking your import proposal into sub-proposals for each type of
> >  data set. E.g. have a different proposal for roads than for buildings.
> >  
> >  
> >  
> >     
> cat2osm can process data of a given municipality as a whole or in
> separate steps, processing different kind of data. That result in
> separate *.osm files, containing buildings, highway=*, parcels,
> subparcels, etc. Also urban and rural areas are in separate input
> shapefiles. What I want to show you is that importer (remember it's not
> planned as an automated import) can control what to import and the size
> of the dataset to upload. I have uploaded some sample data to [1]. For a
> given municipality, zip contains raw data provided by cat2osm for
> highway=*, current data in OSM database and merged data for the urban
> area processed with JOSM. IMHO these data could be uploaded to OSM
> (using JOSM) without any risk to face those problems have been mentioned
> in this thread.
>   
> [1]http://mapas.alternativaslibres.es/Navalvillar.zip
>
>
>
>
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-- 
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LibreOffice está en continuo desarrollo y no tendrá que pagar por las nuevas versiones.

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