<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi Andrew,<br><br>A gz file is simply a zip file containing compressed files. In this case compressed GML files. On Linux, gunzip <file.gz> will extract them, on Windows most unzipping utilities will decompress & extract the contents.<br><br>The uncompressed files do not appear to have a gml suffix, but if QGIS is set to open "all files" instead of just a specified type, it can determine the file type from the file contents & open them using OGR.<br> <br>I don't see any reason for QGIS to work wth compressed archive files directly, users can easily extract the contents & then open with QGIS.<br><br>OGR can convert to shapefiles, or load into a database, but neither of these is a QGIS specific role, and I'm not sure a QGIS howto is the appropriate place for an introduction to spatial data mgmt. This would be better done by pointing at a
PostGIS tutorial.<br><br>Cheers<br><br>Brent Wood<br><br>--- On <b>Mon, 3/28/11, Andrew Chapman <i><andrew.chapman@donkagen.co.uk></i></b> wrote:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: Andrew Chapman <andrew.chapman@donkagen.co.uk><br>Subject: RE: [Qgis-user] Public Sector Mapping Agreement<br>To: "'Noli Sicad'" <nsicad@gmail.com><br>Cc: qgis-user@lists.osgeo.org<br>Date: Monday, March 28, 2011, 3:55 AM<br><br><div class="plainMail">Hi Noli<br><br>Ordnance Survey has confirmed that the best URL for sample files is<br><a href="http://www.ordnancesurvey.co.uk/oswebsite/products/innovations/discoverdata" target="_blank">http://www.ordnancesurvey.co.uk/oswebsite/products/innovations/discoverdata</a>.<br>html#mastermap.<br><br>Andrew<br>________________________________________<br>From: Noli Sicad [mailto:<a ymailto="mailto:nsicad@gmail.com"
href="/mc/compose?to=nsicad@gmail.com">nsicad@gmail.com</a>] <br>Sent: 04 March 2011 05:59<br>To: Andrew Chapman<br>Cc: <a ymailto="mailto:qgis-user@lists.osgeo.org" href="/mc/compose?to=qgis-user@lists.osgeo.org">qgis-user@lists.osgeo.org</a><br>Subject: Re: [Qgis-user] Public Sector Mapping Agreement<br><br>Hi Andrew,<br><br>> To encourage take-up for both GIS and QGIS, it may help if there were<br>> tutorials to take a new user of GIS through the steps to download data<br>from<br>> Ordnance Survey (probably only in GZ format for the topology layers).<br>> To date I've been getting data as shapefiles - when I last tried (an<br>earlier<br>> version) QGIS wouldn't load .gz and the support for .gml may have been<br>> incomplete.<br>> Is anyone else using Ordnance Survey .gz files directly?<br>> Would the best advice for users new to GIS be to convert to shapefiles or<br>> use a database (something I've not yet managed to
do)?<br>> Are there any UK users involved with town or parish councils?<br><br>I think it would be wise to put an example of this OS gz file so we<br>can try if we can open it with QGIS. Just a very simple example of the<br>file :-).<br><br>Then, post the URL where we can download it.<br><br>Noli <br>________________________________________<br>No virus found in this message.<br>Checked by AVG - www.avg.com<br>Version: 10.0.1204 / Virus Database: 1435/3479 - Release Date: 03/03/11<br><br>_______________________________________________<br>Qgis-user mailing list<br><a ymailto="mailto:Qgis-user@lists.osgeo.org" href="/mc/compose?to=Qgis-user@lists.osgeo.org">Qgis-user@lists.osgeo.org</a><br><a href="http://lists.osgeo.org/mailman/listinfo/qgis-user" target="_blank">http://lists.osgeo.org/mailman/listinfo/qgis-user</a><br></div></blockquote></td></tr></table>