Hi,<div>I'm sending the first draft of our PostGIS story.</div><div><br></div><div><b>Clever°Maps’</b></div><div><br></div><div>Clever°Maps’ is a three years old startup based in the Czech Republic. We create web apps for four distinct market segments:</div><div>1) business/location inteligence - helping companies to make decisions based on data, not on feelings</div><div>2) farming - simplifying agenda and everyday work</div><div>3) road infrastructure administration - settlement of land property rights, treaty evidence, speeding up the whole administrative process</div><div>4) assets administration - treaty management, land purchases</div><div><br></div><div>All our activities take advantage from PostgreSQL as a great DBMS and PostGIS as a tool to query for data our apps need. These days we keep a complete monthly updated copy of the whole Czech cadastre together with LPIS (Land Parcel Identification System), that is more than 650 GB of data. We use PostGIS for much more than simple queries (although talking millions of parcel lots it is hard to tell them simple anymore):</div><div>1) it helped us identify potential issues related to land property rights in one of the regions in the Czech Republic</div><div>2) we relied on PostGIS heavily during the French LPIS update in 2015</div><div>3) it was used during the Czech LPIS controls in 2015 where tens of operators were accessing the database, commiting changes to vector layers</div><div>4) we use it to intersect LPIS lots with cadastral lots to find relations between those two datasets</div><div>5) we use it to parse the national cadastral topological data format (called VFK) - a pretty interesting task that was</div><div>6) thanks to continual data update we can watch for treaty changes and notify our customers as soon as possible</div><div>7) it notifies farmers who use our app of any violation of fertilizers usage on their land (e.g. some substances cannot be used nearby water sources)</div><div><br></div><div>Recently our BI team pushed the limits of PostgreSQL/PostGIS trying to use it on ~180M rows of spatial data. They eventually ended up using Amazon Redshift, but the whole geoprocessing is still done in PostGIS beforehand.</div><div><br></div><div>We are planning to stick with PostGIS as we consider it a corner stone of our success. Combined with other open source tools (QGIS, GeoServer, Leaflet) it lets you do great, unexpected things with data you have.</div><div><br></div><div>Any suggestions/fixes welcome.</div><div><br></div><div><br><br><div style="white-space: pre;"><b><span></span></b><p style="font-size:12.8px;line-height:1.1;margin-top:0pt;margin-bottom:0pt"><span style="color:rgb(0,0,0)"><span style="vertical-align:baseline;font-size:16px;white-space:pre-wrap;font-family:Arial;font-weight:bold"><font size="2">Michal Zimmermann</font></span></span></p><p style="font-size:12.8px;line-height:1.1;margin-top:0pt;margin-bottom:0pt"><span style="vertical-align:baseline;color:rgb(225,74,65);font-size:16px;white-space:pre-wrap;font-family:Arial;font-weight:bold"><br></span></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1.1;margin-top:0pt;margin-bottom:0pt"><span style="vertical-align:baseline;color:rgb(225,74,65);font-size:16px;white-space:pre-wrap;font-family:Arial;font-weight:bold">CLEVER°MAPS'</span><span style="font-size:16px;font-family:Arial;color:rgb(225,74,65);font-weight:bold;vertical-align:baseline;white-space:pre-wrap;background-color:transparent"></span></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1.1;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(225,74,65);font-weight:bold;vertical-align:baseline;white-space:pre-wrap;background-color:transparent">°</span><span style="vertical-align:baseline;font-size:15px;white-space:pre-wrap;font-family:Cambria;background-color:transparent"></span></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1;margin-top:0pt;margin-bottom:0pt"><span style="font-family:Arial;color:rgb(225,74,65);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">Vídeňská 101/119, </span><span style="vertical-align:baseline;white-space:pre-wrap;font-family:Arial;background-color:transparent"></span></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1;margin-top:0pt;margin-bottom:0pt"><span style="font-family:Arial;color:rgb(225,74,65);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">Vienna Point II</span><span style="vertical-align:baseline;white-space:pre-wrap;font-family:Arial;background-color:transparent"></span></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1;margin-top:0pt;margin-bottom:0pt"><span style="font-family:Arial;color:rgb(225,74,65);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">619 00, Brno</span><span style="vertical-align:baseline;white-space:pre-wrap;font-family:Arial;background-color:transparent"></span></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1;margin-top:0pt;margin-bottom:0pt"><span style="font-family:Arial;color:rgb(225,74,65);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">Czech Republic</span><span style="vertical-align:baseline;white-space:pre-wrap;font-family:Arial;background-color:transparent"></span></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1;margin-top:0pt;margin-bottom:0pt"><span style="font-family:Arial;color:rgb(225,74,65);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">T/ <a value="+420731493358" style="color:rgb(17,85,204)">+420 </a></span><a value="+420511188867" style="color:rgb(17,85,204);line-height:1;font-family:Arial;white-space:pre-wrap;background-color:transparent">511 188 867</a><span style="vertical-align:baseline;white-space:pre-wrap;font-family:Arial;background-color:transparent"></span></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1;margin-top:0pt;margin-bottom:0pt"><span style="font-family:Arial;color:rgb(225,74,65);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">M/ <a value="+420511188867" style="color:rgb(17,85,204)">+420 </a></span><a value="+420731493358" style="color:rgb(17,85,204);font-family:Arial;white-space:pre-wrap">603 513 860</a></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1;margin-top:0pt;margin-bottom:0pt"><span style="vertical-align:baseline;white-space:pre-wrap;font-family:Arial;background-color:transparent"></span></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1;margin-top:0pt;margin-bottom:0pt"><span style="font-family:Arial;color:rgb(6,105,176);text-decoration:underline;vertical-align:baseline;white-space:pre-wrap;background-color:transparent"><a href="mailto:michal.zimmermann@clevermaps.cz" style="color:rgb(17,85,204)" target="_blank">michal.zimmermann<span></span>@clevermaps.cz</a></span><span style="vertical-align:baseline;white-space:pre-wrap;font-family:Arial;background-color:transparent"></span></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1;margin-top:0pt;margin-bottom:0pt"><span style="font-family:Arial;color:rgb(6,105,176);text-decoration:underline;vertical-align:baseline;white-space:pre-wrap;background-color:transparent"><a href="http://www.clevermaps.cz/" style="color:rgb(17,85,204)" target="_blank">www.clevermaps.cz</a></span><span style="vertical-align:baseline;white-space:pre-wrap;font-family:Arial;background-color:transparent"></span></p><p style="font-size:12.8000001907349px;line-height:15.390625px;margin:0px;font-family:Arial,Helvetica,sans-serif;font-weight:bold;padding:0px"><span style="font-weight:normal"><br><span style="vertical-align:baseline;font-size:4px;white-space:pre-wrap;font-family:Cambria;background-color:transparent"></span></span></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1.1;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(225,74,65);font-weight:bold;vertical-align:baseline;white-space:pre-wrap;background-color:transparent">°</span><span style="vertical-align:baseline;font-size:15px;white-space:pre-wrap;font-family:Cambria;background-color:transparent"></span></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1;margin-top:0pt;margin-bottom:0pt"><span style="font-size:9px;font-family:Arial;color:rgb(225,74,65);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">Thank you for considering the environmental </span><span style="vertical-align:baseline;font-size:9px;white-space:pre-wrap;font-family:Cambria;background-color:transparent"></span></p><p dir="ltr" style="font-size:12.8000001907349px;line-height:1;margin-top:0pt;margin-bottom:0pt"><span style="font-size:9px;font-family:Arial;color:rgb(225,74,65);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">impact of printing emails.</span></p></div>
<br><br>On Čt, bře 10, 2016 at 9:00 , postgis-users-request@lists.osgeo.org wrote:<br>
<blockquote type="cite"><div class="plaintext" style="white-space: pre-wrap;">Send postgis-users mailing list submissions to
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When replying, please edit your Subject line so it is more specific
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Today's Topics:
1. raster question (Stephen Crawford)
2. Re: Call for Case Studies and knowledge about who uses
PostGIS and how (Andy Colson)
----------------------------------------------------------------------
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
<div>--
</div>Stephen Crawford
Center for Environmental Informatics
The Pennsylvania State University
------------------------------
Message: 2
Date: Thu, 10 Mar 2016 13:38:24 -0600
From: Andy 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>
Subject: Re: [postgis-users] Call for Case Studies and knowledge about
who uses PostGIS and how
Message-ID: <<a href="mailto:56E1CD30.9040800@squeakycode.net">56E1CD30.9040800@squeakycode.net</a>>
Content-Type: text/plain; charset=utf-8; format=flowed
On 3/9/2016 11:49 AM, Nicklas Avén wrote:
<blockquote> Hi all
At PostGIS web site <a href="http://www.postgis.net">http://www.postgis.net</a>, there is a case study list
of PostGIS usage. The list is very short and not touched for some years.
</blockquote>
Here is a first draft, spelling/fixes/suggestions welcome:
Vanguard Appraisals is new to the GIS world. In fact, we aren't really
in the GIS world; we just kind of brush up against it. We do mass
property appraisal for entire county and city jurisdictions, and we
develop software to collect, price and maintain values. We also host
assessment data online so that homeowners can search and find property
information much simpler from the comfort of their own home. Our
software and websites are used in 7 states (IA, IL, MN, MO, NE, ND, SD).
We were happy in our little world, doing parcel stuff, not really
knowing about or using GIS, but then the landscape started changing, and
GIS started popping up all over the place. Our clients starting asking
us if we could host their GIS data, as well as their parcel data. Some
of our clients are very small; there is one person in the Assessor's
office with one computer, no server, and a very small internet pipe.
Some of our clients are big with many users, multiple servers, and an
internet pipe that makes me blush. :-)
We searched and found something that already worked with our favorite
database: PostgreSQL. PG is already hosting our parcel data, so it
seemed like a good idea to let it host our GIS data too. Using PostGIS
combined with MapServer, Perl and OpenLayers, we came up with online
maps that fit the bill:
1) Great performance.
2) Sql: the ability to write sql to join our existing parcel data
with GIS data makes it simple to work with, powerful, and fast.
3) Free: because we didn't pay for anything, we didn't charge
anything. Government Assessor’s offices don't have to charge tax payers
to get their GIS online.
PostGIS has been a great decision. When one of our programmers came up
with a crazy idea about doing a sales ratio analysis and highlighting
all the properties on the map, not only was it possible but not that
hard to do, and it has already been implemented because of PostGIS.
I also cannot stress enough how good and helpful the online community
has been. I went from knowing nothing about GIS to hosting maps only
because of them and all the questions they helped with over the years.
Vanguard Appraisals: <a href="http://camavision.com/">http://camavision.com/</a>
Assessment Data: <a href="http://iowaassessors.com/">http://iowaassessors.com/</a>
We host parcel data for all the yellow links, but we don't host the maps
for all of them. Some counties we host maps for are: Washington MN,
Jasper IA, Van Buren IA, Iowa City IA. Just over 50 counties so far.
You can find the map embedded into the parcel page:
<a href="http://vanburen.iowaassessors.com/parcel.php?parcel=000600307304130">http://vanburen.iowaassessors.com/parcel.php?parcel=000600307304130</a>
or Full Page:
<a href="http://maps.camavision.com/map/jasperia">http://maps.camavision.com/map/jasperia</a>
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</div></blockquote></div>