[Qgis-user] Public Sector Mapping Agreement

[Saber]

Forgot to send the link:
http://forum.qgis.org/viewtopic.php?f=2&t=8155

Cheers
Saber


> Andrew
>
> I opened a thread on QGIS forum and posted screenshots of the example of
> Mastermap from OS with Google layer background and some labeling.
>
> These might help:
>  - If you are using Windows, for uncompressing files you can use PeaZip
> which is free and open source as opposed to WinZip which is a shareware.
>
>  - I noticed gml is a bit slow. It might help to convert the files to
> spatialite which you can edit in QGIS and does not have some of shapefile
> limitations.
>
>  - The orientation was fine for me. (Check the flow direction on the first
> image.)
>
> Cheers
> Saber
>
>
>
>> I have old sample OS .gz files, but it would be best to use their
>> current
>> ones. The data SHOULD be available via the "Download our sample data"
>> section at www.ordnancesurveymastermap.com/ (I can't find a direct link
>> to
>> files), but it wouldn't work when I tried. I've reported the problem to
>> OS
>> and am waiting for a human response.
>> A further source of additional information is the OS XML Schema
>> Respository
>> www.ordnancesurvey.co.uk/oswebsite/xml/schema/index.html, but I don't
>> know
>> enough about QGIS to understand how to use these.
>> I've tried an old sample .gz file with both 1.6 and 1.7. Neither version
>> supports direct opening of .gz (which would be the simplest way for new
>> users), but actually open the unzipped .gml files. I have had problems
>> in
>> the past with older versions of WinZip (e.g. 12.0) where they couldn't
>> unzip
>> this format correctly, but gzip or other alternatives worked. The latest
>> WinZip (15.0.) also seems to work, although you have to enter the
>> extension
>> of the file to expand, as it doesn't know to add .gml.
>> Unless the latest format has changed, OS uses the 'orientation'
>> attribute
>> for text angle, but the value seems to be (degrees * 10). The loaded GML
>> layer doesn't allow editing, so it isn't possible to add a further
>> attribute
>> calculated from 'orientation'. Saving as a shapefile under 1.6 fails
>> with
>> an
>> error because, when the longer GML attribute names are trimmed to ten
>> significant characters, there are duplicate attribute names.
>>
>> Andrew
>> ________________________________________
>> From: Noli Sicad [mailto:nsicad at gmail.com]
>> Sent: 04 March 2011 05:59
>> To: Andrew Chapman
>> Cc: qgis-user at lists.osgeo.org
>> Subject: Re: [Qgis-user] Public Sector Mapping Agreement
>>
>> Hi Andrew,
>>
>>> To encourage take-up for both GIS and QGIS, it may help if there were
>>> tutorials to take a new user of GIS through the steps to download data
>> from
>>> Ordnance Survey (probably only in GZ format for the topology layers).
>>> To date I've been getting data as shapefiles - when I last tried (an
>> earlier
>>> version) QGIS wouldn't load .gz and the support for .gml may have been
>>> incomplete.
>>> Is anyone else using Ordnance Survey .gz files directly?
>>> Would the best advice for users new to GIS be to convert to shapefiles
>>> or
>>> use a database (something I've not yet managed to do)?
>>> Are there any UK users involved with town or parish councils?
>>
>> I think it would be wise to put an example of this OS gz file so we
>> can try if we can open it with QGIS. Just a very simple example of the
>> file :-).
>>
>> Then, post the URL where we can  download it.
>>
>> Noli
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