<div dir="ltr"><div class="gmail_default" style="font-family:monospace,monospace">Hey,</div><div class="gmail_default" style="font-family:monospace,monospace">short testimony about using Postgres/PostGIS for prototyping/research.</div><div class="gmail_default" style="font-family:monospace,monospace"><br></div><div class="gmail_default" style="font-family:monospace,monospace">I used extensively postgis (+ecosystem) for my phd thesis, in several ways.</div><div class="gmail_default" style="font-family:monospace,monospace">The first is that PostGIS is a good steady horse (elephant?):</div><div class="gmail_default" style="font-family:monospace,monospace">a database is the perfect place to store a lot of very different information in the same place and put them in relation.</div><div class="gmail_default" style="font-family:monospace,monospace">For geospatial data, postgis means you always have a way to put data in relation (are they at the same place?).<br></div><div class="gmail_default" style="font-family:monospace,monospace"><br></div><div class="gmail_default" style="font-family:monospace,monospace">So we have a vehicle with lots of sensors (camera, lidar, gps, etc.)</div><div class="gmail_default" style="font-family:monospace,monospace">Postgis is the perfect candidate to store metadata of all of this.<br>For instance I would store the image position, the lidar points using pgpointcloud, the trajectory, the metadata,etc.</div><div class="gmail_default" style="font-family:monospace,monospace"><br></div><div class="gmail_default" style="font-family:monospace,monospace">Postgis advanced linear referencing capabilities means its possible to deal with the temporal aspect of the data as well.</div><div class="gmail_default" style="font-family:monospace,monospace"><br></div><div class="gmail_default" style="font-family:monospace,monospace">Second usage is PostGIS ecosystem.</div><div class="gmail_default" style="font-family:monospace,monospace">Postgis has a strong ecosystem, and that alone is a very good reason to use it. This ecosystem is even wider because so many tools can read/write into PostGIS.</div><div class="gmail_default" style="font-family:monospace,monospace">I mentionned pgpointcloud, but postgis_topology is the base of my work, and I also used pgrounting to perform graph analysis and road network reconstruction, and postgis raster to store and use some aerial images, as well as postgres extension (text analysis).</div><div class="gmail_default" style="font-family:monospace,monospace"><br></div><div class="gmail_default" style="font-family:monospace,monospace">Third usage : powa user</div><div class="gmail_default" style="font-family:monospace,monospace">Now for the advanced part, postgis is so reliable and flexible it can be abused to perform all sort of nice things, especially in the field of automatism.</div><div class="gmail_default" style="font-family:monospace,monospace">In my phd I perform road generation for Paris fully in base, with a lot of call to postgis geometrical functions.</div><div class="gmail_default" style="font-family:monospace,monospace"><br></div><div class="gmail_default" style="font-family:monospace,monospace">Furthermore, PostGIS + trigger + any GIS can be made into <a href="https://www.youtube.com/watch?v=grlkUvvSf3w&t=5m36s">potent interactive system</a>, and because of the whole transaction stuff, multi user <a href="http://remi-c.github.io/interactive_map_tracking/">is facilitated</a>.</div><div class="gmail_default" style="font-family:monospace,monospace"><br></div><div class="gmail_default" style="font-family:monospace,monospace"><br></div><div class="gmail_default" style="font-family:monospace,monospace">Perhaps my favorite part of all of this is in base python (plpythonu), which complements very well postgis when you need to design your own geometric functions or performed advanced stuff like clustering/machine learning/stats, etc.</div><div class="gmail_default" style="font-family:monospace,monospace"><br></div><div class="gmail_default" style="font-family:monospace,monospace">Cheers,</div><div class="gmail_default" style="font-family:monospace,monospace">Rémi-C</div></div><div class="gmail_extra"><br><div class="gmail_quote">2016-03-24 22:35 GMT+01:00 Nicklas Avén <span dir="ltr"><<a href="mailto:nicklas.aven@jordogskog.no" target="_blank">nicklas.aven@jordogskog.no</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello<br>
<br>
Now I have added 2 new case studies at <a href="http://postgis.net" rel="noreferrer" target="_blank">http://postgis.net</a><br>
Tell me if it should be changed in some way.<br>
<br>
More stories are welcome.<br>
<br>
<br>
Sorry for the delay.<br>
<br>
Best Regards<br>
<span class="HOEnZb"><font color="#888888">Nicklas Avén<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
<br>
<br>
On Wed, 2016-03-23 at 20:09 +0100, Michal Zimmermann wrote:<br>
> Hi,<br>
> any progress with the case studies page?<br>
><br>
> On Mon, Mar 14, 2016 at 7:21 AM, Michal Zimmermann<br>
> <<a href="mailto:michal.zimmermann@clevermaps.cz">michal.zimmermann@clevermaps.cz</a>> wrote:<br>
> > Hi Nicklas,<br>
> > that's great news! I'm not 100 % sure, but we needed the real-time<br>
> > results based on user's desire (e.g. show me all the neighbourhoods<br>
> > people come to my store from). Guys started experimenting with<br>
> > Redshift that uses columnar data storage and got some boost in<br>
> > speed. I think they precalculated some measures before releasing the<br>
> > project, so the math is not done on the fly, eventually.<br>
> ><br>
> > Michal Zimmermann<br>
> ><br>
> ><br>
> > CLEVER°MAPS'<br>
> ><br>
> > °<br>
> ><br>
> > Vídeňská 101/119,<br>
> ><br>
> > Vienna Point II<br>
> ><br>
> > 619 00, Brno<br>
> ><br>
> > Czech Republic<br>
> ><br>
> > T/ +420 511 188 867<br>
> ><br>
> > M/ +420 603 513 860<br>
> ><br>
> > <a href="mailto:michal.zimmermann@clevermaps.cz">michal.zimmermann@clevermaps.cz</a><br>
> ><br>
> > <a href="http://www.clevermaps.cz" rel="noreferrer" target="_blank">www.clevermaps.cz</a><br>
> ><br>
> ><br>
> > °<br>
> ><br>
> > Thank you for considering the environmental<br>
> ><br>
> > impact of printing emails.<br>
> ><br>
> ><br>
> ><br>
> ><br>
> > On So, bře 12, 2016 at 11:15 , Nicklas Aven<br>
> > <<a href="mailto:nicklas.aven@jordogskog.no">nicklas.aven@jordogskog.no</a>> wrote:<br>
> > > Hallo<br>
> > ><br>
> > > Thanks a lot for your description. I will put it on the list on<br>
> > > the web page of PostGIS.<br>
> > ><br>
> > > I write this of og list just because I haven't had time to do<br>
> > > anything about it yet.<br>
> > ><br>
> > > Thanks<br>
> > ><br>
> > > Nicklas Avén<br>
> > ><br>
> > ><br>
> > > Skickat från min Sony Xperia™-smartphone<br>
> > ><br>
> > ><br>
> > ><br>
> > > ---- Michal Zimmermann skrev ----<br>
> > ><br>
> > > Hi,<br>
> > > I'm sending the first draft of our PostGIS story.<br>
> > ><br>
> > ><br>
> > > Clever°Maps’<br>
> > ><br>
> > ><br>
> > > Clever°Maps’ is a three years old startup based in the Czech<br>
> > > Republic. We create web apps for four distinct market segments:<br>
> > > 1) business/location inteligence - helping companies to make<br>
> > > decisions based on data, not on feelings<br>
> > > 2) farming - simplifying agenda and everyday work<br>
> > > 3) road infrastructure administration - settlement of land<br>
> > > property rights, treaty evidence, speeding up the whole<br>
> > > administrative process<br>
> > > 4) assets administration - treaty management, land purchases<br>
> > ><br>
> > ><br>
> > > All our activities take advantage from PostgreSQL as a great DBMS<br>
> > > and PostGIS as a tool to query for data our apps need. These days<br>
> > > we keep a complete monthly updated copy of the whole Czech<br>
> > > cadastre together with LPIS (Land Parcel Identification System),<br>
> > > that is more than 650 GB of data. We use PostGIS for much more<br>
> > > than simple queries (although talking millions of parcel lots it<br>
> > > is hard to tell them simple anymore):<br>
> > > 1) it helped us identify potential issues related to land property<br>
> > > rights in one of the regions in the Czech Republic<br>
> > > 2) we relied on PostGIS heavily during the French LPIS update in<br>
> > > 2015<br>
> > > 3) it was used during the Czech LPIS controls in 2015 where tens<br>
> > > of operators were accessing the database, commiting changes to<br>
> > > vector layers<br>
> > > 4) we use it to intersect LPIS lots with cadastral lots to find<br>
> > > relations between those two datasets<br>
> > > 5) we use it to parse the national cadastral topological data<br>
> > > format (called VFK) - a pretty interesting task that was<br>
> > > 6) thanks to continual data update we can watch for treaty changes<br>
> > > and notify our customers as soon as possible<br>
> > > 7) it notifies farmers who use our app of any violation of<br>
> > > fertilizers usage on their land (e.g. some substances cannot be<br>
> > > used nearby water sources)<br>
> > ><br>
> > ><br>
> > > Recently our BI team pushed the limits of PostgreSQL/PostGIS<br>
> > > trying to use it on ~180M rows of spatial data. They eventually<br>
> > > ended up using Amazon Redshift, but the whole geoprocessing is<br>
> > > still done in PostGIS beforehand.<br>
> > ><br>
> > ><br>
> > > We are planning to stick with PostGIS as we consider it a corner<br>
> > > stone of our success. Combined with other open source tools (QGIS,<br>
> > > GeoServer, Leaflet) it lets you do great, unexpected things with<br>
> > > data you have.<br>
> > ><br>
> > ><br>
> > > Any suggestions/fixes welcome.<br>
> > ><br>
> > ><br>
> > ><br>
> > ><br>
> > > Michal Zimmermann<br>
> > ><br>
> > ><br>
> > > CLEVER°MAPS'<br>
> > ><br>
> > > °<br>
> > ><br>
> > > Vídeňská 101/119,<br>
> > ><br>
> > > Vienna Point II<br>
> > ><br>
> > > 619 00, Brno<br>
> > ><br>
> > > Czech Republic<br>
> > ><br>
> > > T/ +420 511 188 867<br>
> > ><br>
> > > M/ +420 603 513 860<br>
> > ><br>
> > > <a href="mailto:michal.zimmermann@clevermaps.cz">michal.zimmermann@clevermaps.cz</a><br>
> > ><br>
> > > <a href="http://www.clevermaps.cz" rel="noreferrer" target="_blank">www.clevermaps.cz</a><br>
> > ><br>
> > ><br>
> > > °<br>
> > ><br>
> > > Thank you for considering the environmental<br>
> > ><br>
> > > impact of printing emails.<br>
> > ><br>
> > ><br>
> > ><br>
> > ><br>
> > > On Čt, bře 10, 2016 at 9:00 ,<br>
> > > <a href="mailto:postgis-users-request@lists.osgeo.org">postgis-users-request@lists.osgeo.org</a> wrote:<br>
> > > > Send postgis-users mailing list submissions to<br>
> > > > <a href="mailto:postgis-users@lists.osgeo.org">postgis-users@lists.osgeo.org</a> To subscribe or unsubscribe via<br>
> > > > the World Wide Web, visit<br>
> > > > <a href="http://lists.osgeo.org/mailman/listinfo/postgis-users" rel="noreferrer" target="_blank">http://lists.osgeo.org/mailman/listinfo/postgis-users</a> or, via<br>
> > > > email, send a message with subject or body 'help' to<br>
> > > > <a href="mailto:postgis-users-request@lists.osgeo.org">postgis-users-request@lists.osgeo.org</a> You can reach the person<br>
> > > > managing the list at <a href="mailto:postgis-users-owner@lists.osgeo.org">postgis-users-owner@lists.osgeo.org</a> When<br>
> > > > replying, please edit your Subject line so it is more specific<br>
> > > > than "Re: Contents of postgis-users digest..." Today's Topics:<br>
> > > > 1. raster question (Stephen Crawford) 2. Re: Call for Case<br>
> > > > Studies and knowledge about who uses PostGIS and how (Andy<br>
> > > > Colson)<br>
> > > > ---------------------------------------------------------------------- Message: 1 Date: Thu, 10 Mar 2016 12:05:14 -0500 From: Stephen Crawford <<a href="mailto:src176@psu.edu">src176@psu.edu</a>> To: PostGIS Users Discussion <<a href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a>> Subject: [postgis-users] raster question Message-ID: <<a href="mailto:56E1A94A.7010008@psu.edu">56E1A94A.7010008@psu.edu</a>> Content-Type: text/plain; charset=utf-8; format=flowed Hell all, I have a table of rasters, daily weather data, each record is one full raster and an date column, all the same extent. One of my use cases is to drill down to get the all the data for a month or year one grid cell. Performance is slow. Should I make tiles of these daily rasters? I guess I was under the impression that tiles should be used on a "one table per raster" basis, and that "many rasters per table" cannot have tiles. Any thoughts? Thanks, Steve<br>
> > > > --<br>
> > > > Stephen Crawford Center for Environmental Informatics The<br>
> > > > Pennsylvania State University ------------------------------<br>
> > > > Message: 2 Date: Thu, 10 Mar 2016 13:38:24 -0600 From: Andy<br>
> > > > Colson <<a href="mailto:andy@squeakycode.net">andy@squeakycode.net</a>> To: <a href="mailto:postgis-users@lists.osgeo.org">postgis-users@lists.osgeo.org</a><br>
> > > > Subject: Re: [postgis-users] Call for Case Studies and knowledge<br>
> > > > about who uses PostGIS and how Message-ID:<br>
> > > > <<a href="mailto:56E1CD30.9040800@squeakycode.net">56E1CD30.9040800@squeakycode.net</a>> Content-Type: text/plain;<br>
> > > > charset=utf-8; format=flowed On 3/9/2016 11:49 AM, Nicklas Avén<br>
> > > > wrote:<br>
> > > > Hi all At PostGIS web site <a href="http://www.postgis.net" rel="noreferrer" target="_blank">http://www.postgis.net</a>, there<br>
> > > > is a case study list of PostGIS usage. The list is very<br>
> > > > short and not touched for some years.<br>
> > > > Here is a first draft, spelling/fixes/suggestions welcome:<br>
> > > > Vanguard Appraisals is new to the GIS world. In fact, we aren't<br>
> > > > really in the GIS world; we just kind of brush up against it. We<br>
> > > > do mass property appraisal for entire county and city<br>
> > > > jurisdictions, and we develop software to collect, price and<br>
> > > > maintain values. We also host assessment data online so that<br>
> > > > homeowners can search and find property information much simpler<br>
> > > > from the comfort of their own home. Our software and websites<br>
> > > > are used in 7 states (IA, IL, MN, MO, NE, ND, SD). We were happy<br>
> > > > in our little world, doing parcel stuff, not really knowing<br>
> > > > about or using GIS, but then the landscape started changing, and<br>
> > > > GIS started popping up all over the place. Our clients starting<br>
> > > > asking us if we could host their GIS data, as well as their<br>
> > > > parcel data. Some of our clients are very small; there is one<br>
> > > > person in the Assessor's office with one computer, no server,<br>
> > > > and a very small internet pipe. Some of our clients are big with<br>
> > > > many users, multiple servers, and an internet pipe that makes me<br>
> > > > blush. :-) We searched and found something that already worked<br>
> > > > with our favorite database: PostgreSQL. PG is already hosting<br>
> > > > our parcel data, so it seemed like a good idea to let it host<br>
> > > > our GIS data too. Using PostGIS combined with MapServer, Perl<br>
> > > > and OpenLayers, we came up with online maps that fit the bill:<br>
> > > > 1) Great performance. 2) Sql: the ability to write sql to join<br>
> > > > our existing parcel data with GIS data makes it simple to work<br>
> > > > with, powerful, and fast. 3) Free: because we didn't pay for<br>
> > > > anything, we didn't charge anything. Government Assessor’s<br>
> > > > offices don't have to charge tax payers to get their GIS online.<br>
> > > > PostGIS has been a great decision. When one of our programmers<br>
> > > > came up with a crazy idea about doing a sales ratio analysis and<br>
> > > > highlighting all the properties on the map, not only was it<br>
> > > > possible but not that hard to do, and it has already been<br>
> > > > implemented because of PostGIS. I also cannot stress enough how<br>
> > > > good and helpful the online community has been. I went from<br>
> > > > knowing nothing about GIS to hosting maps only because of them<br>
> > > > and all the questions they helped with over the years. Vanguard<br>
> > > > Appraisals: <a href="http://camavision.com/" rel="noreferrer" target="_blank">http://camavision.com/</a> Assessment Data:<br>
> > > > <a href="http://iowaassessors.com/" rel="noreferrer" target="_blank">http://iowaassessors.com/</a> We host parcel data for all the yellow<br>
> > > > links, but we don't host the maps for all of them. Some counties<br>
> > > > we host maps for are: Washington MN, Jasper IA, Van Buren IA,<br>
> > > > Iowa City IA. Just over 50 counties so far. You can find the map<br>
> > > > embedded into the parcel page:<br>
> > > > <a href="http://vanburen.iowaassessors.com/parcel.php?parcel=000600307304130" rel="noreferrer" target="_blank">http://vanburen.iowaassessors.com/parcel.php?parcel=000600307304130</a> or Full Page: <a href="http://maps.camavision.com/map/jasperia" rel="noreferrer" target="_blank">http://maps.camavision.com/map/jasperia</a> ------------------------------ Subject: Digest Footer _______________________________________________ postgis-users mailing list <a href="mailto:postgis-users@lists.osgeo.org">postgis-users@lists.osgeo.org</a> <a href="http://lists.osgeo.org/mailman/listinfo/postgis-users" rel="noreferrer" target="_blank">http://lists.osgeo.org/mailman/listinfo/postgis-users</a> ------------------------------ End of postgis-users Digest, Vol 169, Issue 8 *********************************************<br>
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