Sunday, August 20. 2017
It's a little known fact that the PostGIS geography type since PostGIS 2.2 (well was introduced in 2.1 I think but had a bug in it until 2.1.4 or so), supports any spheroidal spatial reference system that measures in degrees. When an srid is not specified, it defaults to using 4326, Earth WGS 84 long lat.
Continue reading "geography type is not limited to earth"
Tuesday, August 01. 2017
Reminder: Right after the Free and Open Source GIS conference in Boston
is the OSGeo
code sprint on Saturday August 19th 9AM-5PM at District Hall where project members from various Open Source Geospatial projects will be fleshing out ideas, documenting, coding, and introducing new folks to open source development. All are welcome including those who are unable to make the conference.
We are getting a final head-count this week to plan for food arrangements. If you are planning to attend, add your name to the list https://wiki.osgeo.org/wiki/FOSS4G_2017_Code_Sprint#Registered_Attendees. If you are unable to add your name to the list, feel free to send Regina an email at email@example.com with your name and projects you are interested in so I can add you to the list. Looking forward to hanging out with folks interested in PostgreSQL and PostGIS development.
District Hall is a gorgeous community space. Check out the District Hall View http://bit.ly/2f61J8c
Saturday, July 29. 2017
FOSS4G 2017 is just a few weeks away.
Many of the workshops will utilize OSGeoLive as a means for workshop participants to get up and running quickly with OSGeo Free and Open Source GIS tools and Boston data. OSGeoLive11 is a LUbuntu 16.04 distribution. OSGeoLive11 is going thru the final stages of prep. You can download the OSGeoLiveRC1 ISO for it from http://aiolos.survey.ntua.gr/gisvm/11.0/osgeo-live-11.0rc1-amd64.iso.
Once OSGeoLive11 is fully prepped, it will be linked on the osgeolive site http://live.osgeo.org.
If you want to run OSGeoLive11 from bootable media, you can burn the ISO to DVD or thumb drive and boot. In final prep, you can expect to have a Virtual Image ready to go you can host on Virtual Box or VMWare and make further customizations. OSGeoLive11 thumb drives will be handed out at the conference.
If you are doing any PostgreSQL/ PostGIS / pgRouting / or other GIS training, OSGeoLive is pretty handy. OSGeoLive11 contains PostgreSQL 9.5 (I know slightly dated) , PostGIS 2.3.2 and cli tools, pgRouting 2.4.1, and osm2pgrouting 2.2.0. In addition it contains popular GIS Desktop friends QGIS, OpenJump, gvSig, uDig as well as power tools like GRASS, R, GDAL CLI toolkit, and Jupyter notebooks. Mapping Servers MapServer and GeoServer. We'll be using pgRouting, osm2pgRouting, PostGIS, PostgreSQL, QGIS, and OpenJump in our workshop Problem Solving with pgRouting. A good chunk of FOSS GIS relies on PostgreSQL via PostGIS so you'll find a lot of already setup PostgreSQL databases on this disk.
For this set of exercises, we're going to go thru using the ISO media linked above on a Windows 7 VirtualBox setup. If you are using any other OS (e.g. Mac OSX, Linux, Unix), instructions should be much the same.
Continue reading "Using OSGeoLive with VirtualBox"
Sunday, May 21. 2017
So PostgreSQL 10beta1 came out recently as Holly mentioned.
When first mention of beta hits, things start getting serious for me. I have to make sure that PostGIS compiles against said distribution to make sure eager testers aren't held back.
As with other releases, PostGIS didn't compile against the new PostgreSQL version without some nurturing. We've still got one regress failure, but at least PostGIS 2.4 now compiles cleanly against
PostgreSQL 10beta1. I'm hoping that we can release PostGIS 2.4.0 just in time for PostgreSQL 10 planned release in September so I don't have to backport PostgreSQL 10 patches I made to lower PostGIS versions.
For PostGIS 2.4 the main focus will be cleaning up the parallel work so that all aggregate functions can enjoy use of parallel optimization. This is even more important with PostgreSQL 10 now that
more kinds of queries can benefit from parallelization work. I'm also hoping to focus more energy on the raster side of things.
Continue reading "PostGIS 2.4.0, Code Sprints and other extensions to try with PostgreSQL 10 beta1"
Wednesday, April 05. 2017
At PGConfUS 2017 last week, we presented a talk: Top 10 Problems Solved by PostGIS. The slides for the talk in HTML format and PDF format. The pgRouting examples at the end of the talk seemed to be the most popular.
We'll be giving a pgRouting workshop at FOSS4G Boston 2017 Aug 14-19th where we'll go into much more depth about topics like drive time analysis and Vehicle Route schedule planning (VRP). We also hope to give a talk at FOSS4G 2017 on PostGIS spatial tricks.
Wednesday, April 05. 2017
Google recently put in beta Google Cloud SQL for PostgreSQL which targets PostgreSQL 9.6 and seems like they plan to stay in line with PostgreSQL offerings similar to the Amazon PostgreSQL RDS and Aurora offerings. I was curious to see what kind of extensions they support.
In Google cloud blog article Cloud SQL for PostgreSQL for your mobile and Geospatial applications in Google Cloud PostGIS is explicitly mentioned as supported. Presumably because Descartes is one of their case studies which I can only guess probably uses PostGIS based on the quote from Tim Kelton, Descartes co-founder:
"Our individual teams, who are building micro services, can quickly provision a database on Cloud SQL. They don't need to bother compiling Geos, Proj4, GDAL, and Lib2xml to leverage PostGIS. And when PostGIS isnâ€™t needed, our teams use PostgreSQL without extensions or MySQL, also supported by Cloud SQL."
Excerpted from their article:
Geospatial support: Easily enable the popular PostGIS extension for geospatial objects in Postgres.
It's unclear from the article what other extensions they support though. Maybe I'll have to try it.
Sunday, March 26. 2017
A reminder, PGConfUS 2017 conference is just days away, and we'll be giving a training March 28th 2017, Jersey City, NJ at 1 PM.
If you are coming, keep an eye on this page PGConf 2017 US Getting Stuff done with PostGIS materials.
If you haven't signed up already, there are still spots, make sure to buy your tickets at http://pgconf.us/conferences/2017#registration.
Continue reading "PGConfUS 2017 Getting Stuff done in PostGIS"
Monday, August 01. 2016
GeoHipster interview with me came out today. Covers how I stumbled into database programming and my work on PostGIS, PostgreSQL and pgRouting. Interview with Regina Obe
Saturday, June 04. 2016
Leo's pgRouting : a Crash Course video made it thru great. Better than mine. Leo doesn't believe in slides, so this is all live demo stuff. The data he used in the video is part of our code/data download for pgRouting: A Practical Guide.
Continue reading "FOSS4GNA 2016: pgRouting - A Crash course video is out"
Tuesday, May 31. 2016
The videos for FOSS4G NA 2016 have started coming out. Recently Andrea Ross posted PostGIS Spatial Tricks talk video. I'm happy to say it looks pretty good and I didn't suck as badly as I worried I would. Thank you very much Andrea. Some talks unfortunately did not come thru. I'm hoping Leo's pgRouting : a Crash Course video made it thru okay as well, and will post that later if it does.
Only small little nit-picks is the first 2-5 minutes or so didn't make it thru and the blue colors on the slides got a little drowned out, but here are the slides if you need full resolution.
Continue reading "FOSS4GNA 2016 PostGIS Spatial Tricks video is out"
Saturday, May 21. 2016
pgRouting 2.2.3 was released last week. Main change is this version now supports PostgreSQL 9.6. Many thanks to Vicky Vergara for working thru the issues with PostgreSQL 9.6 and getting it to work. Vicky has also been doing a good chunk of the coding (a lot of Boost refactoring and integrating more Boost features), testing, and documentation in pgRouting, osm2pgrouting, and QGIS pgRoutingLayer in general for pgRouting 2.1, 2.2, and upcoming 2.3. We are very indebted to her for her hard work.
If you are a windows user testing the waters of PostgreSQL 9.6beta1, we have pgRouting 2.2.3 binaries and PostGIS 2.3.0dev
binaries at http://postgis.net/windows_downloads.
Continue reading "pgRouting 2.2.3 released with support for PostgreSQL 9.6beta1"
Friday, May 13. 2016
PostgreSQL 9.6beta1 came out yesterday. It is the first version of PostgreSQL that will have parallel query support and PostGIS 2.3 will be the first PostGIS to support parallelism in queries. Although work is not yet committed in PostGIS repo to support this, you can expect to see this soon (currently here - https://github.com/pramsey/postgis/tree/parallel , waiting for someone to you know who you are do something about it.)
Some parallel support has been committed. More to come. pgRouting 9.6 issues resolved, many thanks to Vicky Vergara
. Now pgRouting 2.2.3 windows binaries available for PostgreSQL 9.6beta1
. Also recently tested these with BigSQL 9.6beta1 Windows 64-bit
(at least the PostGIS ones), and seem to work fine. BigSQL paths are a little different from EDB (so be careful when copying to copy to right folder, zip structure follows the EDB structure. Also make sure not to overwrite files that came packaged with BigSQL, since there is more file overlap since we both use mingw64, but their gcc is newer).
Because of the newness of the parallelization feature, there are some caveats.
As with all big things, we expect there to be a lot of bugs, and the more eyeballs on those and real workloads we've got hammering on them, the sweeter the PostGIS 2.3.0 and PostgreSQL 9.6 release will be.
Binaries for Windows users
For windows users, winnie the PostGIS windows buildbot is now building PostGIS for 9.6. Get PostgreSQL 9.6 binaries and installers from PostgreSQL 9.6beta1 for windows.
Once you have that, just copy the contents of the respective PostGIS 2.3 9.6 binaries listed here - http://postgis.net/windows_downloads/ into your install folder.
In the extras folder, you'll also find ogr_fdw foreign data wrapper latest development version which we covered extensively in FOSS4GNA2016 PostGIS Spatial Tricks. Talk also covered some new PostGIS 2.3.0 stuff.
We don't have pgRouting binaries available yet. pgRouting team is working out some compatibility issues with PostgreSQL 9.6. Once those are resolved, we will publish pgRouting binaries as well.
Saturday, March 26. 2016
The FOSS4G NA 2016 in North Carolina early bird registration running May 2nd-5th (May 2nd is workshop day) will be ending this month. This means after this month, ticket prices will go up by as much as $200 depending on what kind of pass you need. If you are a speaker you should register now so we have a good head-count. Hotel prices will go up after this coming week too since conference room block will expire so all the more reason to register now.
On a related note, both Leo and I will be giving talks.
There will be other PostGIS talks and PostgreSQL day (May 3rd) talks for PostGIS and PostgreSQL users.
Monday, March 07. 2016
We'd like to give a big thanks to Olivier Courtin and Oslandia for organizing this year's OSGeo Code Sprint in Paris. It was quite memorable
and I walked away feeling energized.
Leo and I attended the Paris OSGeo Code Sprint for 1.5 days. I'm really glad we were able to attend at least part of it.
It would have been nicer to attend all of it. Though we didn't get too much done while there,
we did have some interesting conversations and learned about what others were doing.
I walked out with a TO DO list, of which I'm happy to say I've accomplished some of now.
While we were there Leo spent time cleaning up my Mingw64 compile scripts and starting to test PostGIS against PostgreSQL 9.6
in preparation for parallelization testing of PostGIS 2.3 features specifically targetted for PostgreSQL 9.6.
Continue reading "Paris OSGeo Code Sprint 2016 PostGIS Highlights"
Thursday, January 28. 2016
Our upcoming book pgRouting: A PRACTICAL GUIDE (publisher LocatePress)
just went on sale a couple of days ago. We currently have a little over 100 pages of content. We expect the final published book to weight in at a little over 250 pages.
pgRouting is a PostgreSQL extension that also utilizes PostGIS for solving routing problems. Routing problems involve application of costs to network paths as well as considerations of the parties involved such as kinds vehicles, people, packages etc. that will be carried across these networks.
While routing is often applied to physical networks like roads and bike paths, the fundamentals of routing go beyond the physical. Spatial concepts such as edges and nodes are a convenient way of visualizing costs across even a logical network.
If you purchase now, you'll get the following benefits:
- Significant discount off the eBook final price. Currently 50% off
- Our current preview draft and updates to the draft as we update it
- Input via our discussion page of what you'd like to see covered. That could be specific functions or kinds of examples or just some clarity.
The focus of this book is pgRouting 2.1+. It's really hard to talk about pgRouting without giving some air time to PostGIS and PostgreSQL, which are some of the key foundations of pgRouting. As such expect to see a lot of talk of PostGIS and PostgreSQL in this book. Since pgRouting 2.0 is so different from pgRouting 2.1, we had to make a difficult decision to focus on the future rather than the past. The appendix does cover some content of how things were done in pgRouting 2.0 and how they changed in pgRouting 2.1+. You can expect the appendix discussion to be expanded. For the core of the book we've largely abandonned any mention of pgRouting 2.0 though pgRouting 2.1 is for the most part backward compatible with pgRouting 2.0 if you choose to be limited by the pgRouting 2.0 function signatures.
We've been pushing package maintainers to focus on releasing pgRouting 2.1 rather than sticking with pgRouting 2.0 and also encouraging maintainers who haven't carried pgRouting before, to start doing so. The PostGIS 2.2 windows bundle comes packaged with pgRouting 2.1 for example. Yes these are selfish reasons, but FOSS is inherently a selfish scratch your own itch kind of pursuit, and that's a good thing since all our common self-interests come together to make something very special that will change the world.
We are planning for the book to be released in another 3-4 months. I know we had planned to release around now, but as happens with every book we've written so far, as we get deeper into it, we realize, keeping it baking just a little longer is so much better than rushing thru the process and outputting a half-baked pie. Although pgRouting 2.2 is still being heavily worked on, the development version is almost feature complete and slated for release in next three to four months. As such we plan to cover some new features coming in pgRouting 2.2 and hope pgRouting 2.2 is out just before or around the same time as this book.