T.Dubya.

It was time once again tonight to preach the open source GIS gospel to the masses.

I felt much better prepared this time with a variety of new demos using QGIS, PostGIS, and Grass. The students really seemed to respond to the extra dose of demos, much needed I think around 8-9pm at night… Also just three months ago I really had no polished applications from work to show off, tonight I had at least three including the Watershed Locator, ODFW demo and Aaron Racicot’s Open Ocean Map. They really show the progress Aaron and I have made in the last few months.

Download Slides

Download Base Data

Students, your comments on my presentation are more than welcome, you can leave them right on this site. Especially the stuff I can do better. I really enjoyed your questions, it was clear some of you were actually paying attention. I hope I inspired at least a single person to try some of the tools out.

We’ve been working hard at Ecotrust on a revamped version of Inforain.

There’s a new mapbook interface providing access to high-resolution images of a number of maps Ecotrust has produced. It allows you to search by name, keyword, region and theme. A variety of presentation, reports and datasets are also available.

Finally, we’ve created a Watershed Locator tool for the site, that allows users to explore watersheds within the Coho salmon territory of North America. It allows you to search by address, watershed name or just by clicking around on the map. Watershed boundaries, major rivers and perennial streams are displayed within an OpenLayers mapping client. One of the most useful features is the watershed ‘ladder’ which allows you to move up and down between watershed ‘levels’. Searching for a particular watershed will also bring up a number of statistics. Some of the more interesting ones include miles of anadromous streams, number of minor and major dams within the watershed, the number of LEED certified buildings, sq.miles of development/farmland/forestland/native land, etc.

A number of open source tools are used in the Watershed Locator including OpenLayers, Mapserver, TileCache, PostGIS, Prototype and Sript.aculo.us. A number of free services were also used including the Google terrain layer for the map and the Yahoo! geocoder for converting addresses to latitude/longitude locations. The terrain map layer is particularly useful for overlaying watershed boundaries. It becomes very clear to the user how the terrain delineates those boundaries. Thank you Google for releasing the terrain layer just weeks before Inforain went live!

In the future we’d like to allow users to access additional watershed resources including links to watershed councils, information on restoration projects, etc. The watershed locator code is available free and open source on our development site The hope is that the concept of a watershed locator as an exploratory educational tool will be replicated in different regions and possibly for different purposes.

I wandered over to the convention center on Friday for opening night of the River City Bluegrass Festival. There was a great lineup including Tim O’Brien and the David Grisman Quintet. I was by myself, which was a blessing in disguise. I met all kinds of great people and even managed to squeeze into a single seat up front at the main stage.

A lot of people had instruments with them and were jamming all over the place: hallways, stairwells, out in the rain. 80 year old great-grandfathers, 8 year old phenoms, they were all there. That’s something that bluegrass brings, community, family. Really inspired me to get my shit together and start playing regularly with folks. Next year river city bluegrass, I’ll be back.

It’s amazing how you form an idea of a person through listening to their recordings, a romanticized notion maybe. Tim O’Brien was not who I expected and he was everything I expected. He’s an everyday guy, who just happens to know how to play guitar, mandolin and fiddle very well. Gives me some hope for myself and my playing.

David “Dawg” Grisman came out with his group The David Grisman Quintet (DGQ) and just blew everyone away with their jazz, bluegrass, funk fusion. It was my first experience listening to Grisman (besides the old grisman, garcia, rice recordings) and all of them were just phenomenal as individual musicians, most were clearly trained in Jazz and able to pull off intricate and complex solos with ease. Matt Eakle on the flute brought this warmth to the whole sound. Overall, man it was just great to listen to this group at a bluegrass festival, really mixing things up. I can relate in some ways, I mean don’t get me wrong I like old timey bluegrass but in this day there are so many musical inspirations that if I continue playing I won’t be able to help but blend them. Why squeeze myself into a box and deny myself that enjoyment?

I met Dawg after the show. What can you say but thank you….

Happy New Year! I seem to have some good momentum going into 2008. Hopefully I can keep things rolling along.

I wrapped the 0.2 release of Delphos into an installer yesterday using Inno Setup. I did this by combining my existing py2exe build script with a sample script from the py2exe code repository. This sample first runs py2exe and then generates a build script for Inno Setup on the fly and passes it to the Inno Setup compiler. Source to installer in one shot!

The biggest issue was getting matplotlib to play nice. PyQt, SqlAlchemy and the other modules had no problem. Matplotlib requires additional data files to be packaged into the py2exe build, multiple directories worth in fact with their own subdirectories and files. Matplotlib has a function that tells you exactly what supplementary data files it needs (called get_py2exe_datafiles), but it didn’t work correctly for me (see this thread). So, until now I would just copy them all into a new build by hand but now I needed Inno Setup to know about each of these files too so it could bundle them into the installer. In this case the handoff from py2exe to Inno Setup is automated so the solution was to tell py2exe about the additional data files and that information would get passed on to be included in the Inno Setup build script that’s generated.

One solution was to list every data file by hand in the py2exe portion of the build script, but geez what a tedious waste of time. This kind of stuff changes regularly so it had to be automated as much as possible. Unfortunately, telling py2exe about multiple directories worth of data files to include isn’t easy. It seems distutils, which py2exe runs on top of, can only be given a list of individual files to include with the build. You can’t (that I know of) simply give it a directory path and it will recursively include all directories and files underneath.

Thankfully I found a nice little function on the net from a guy named jt (referenced in the build script) that walks a directory structure and builds a list of file names and paths in the form that py2exe expects. I used that same function to package all of my documentation files and other boilerplate stuff with the build. Very slick. I had to make a quick fix to it though as the function was mistaking directories for files in some cases. Py2exe handled this fine but InnoSetup would error if asked to copy a directory when expecting a file. So, I essentially massacred a sweet little 2 line piece of functional programming goodness and dropped in a ‘quick’ fix. Time is short ya know…

The py2exe/Inno Setup build script can be found here.

I’ve been busy at the ‘ol office. I just wrapped up the second release of Delphos (version 0.2). It’s available here free and open source under the GPL license. Windows and mac binaries are available, but you can run it from source on Linux as well.

Here’s the blurb I cooked up about what it is, still tweaking it:
“Delphos is a database management and decision-support tool that utilizes multicriteria analysis (MCA) to select the best alternative from a group. Delphos is developed by Ecotrust in partnership with Comunidad y Biodiversidad (COBI) and World Wildlife Fund (WWF). The documentation included with Delphos is tailored for the selection of fisheries and marine protected areas. However, Delphos is general enough to be used towards the analysis of any type of alternatives.”

Screenshots

It’s been a lot of fun using the QT framework for this tool, especially in a Python environment using PyQT. I’ll admit I don’t yet have a Pythonic mindset and I’m not yet correctly using the MVC design pattern, but I’m getting there. Let’s just say that if and when I bust out another release of Delphos I have a list of things to gut and re-implement.

For the last week I’ve been learning the Ext javascript framework and its really been a joy. Version 2.0 is very polished and it “just works”. I put together a very basic tool demo for Oregon Department of Fish and Wildlife and Alaska Department of Fish and Game that uses Ext for the layout, OpenLayers for the mapping component and Mapserver/PostGIS on the backend for serving up map tiles and doing spatial queries. The library is a beast but its everything you want in one place (think jQuery+Prototype+YUI).

Now to find a robust framework for the backend (I’m tired of PHP), maybe Pylons.

ODFW Demo - Try selecting the Coos Bay or Tillamook Bay Coho Population in the menu and then opening the Adult tab to view different metrics queried from the DB.

More tool are in the works, stay tuned.

Tonight, I gave a rousing talk on open source GIS to a group of students at Portland State University.

I have not doubt they will seek out the things of which I spoke! I hope you students enjoyed it, I’ve never talked for 45 minutes straight in my entire life.  Feel free to leave me a comment!

Here is the presentation for your viewing pleasure (download)

The Soulgama kiln was fired up last month out at Stephen Mickey’s place. I had a great time firing with everybody and I definitely came out with a few really sweet pots.

This time we decided to try tumble stacking the back section, which is typically the coolest part of the kiln overall. We managed to keep the back (the floor at least) around cone 10 (2350 deg F) while flattening cone 13 in the back of the middle section of the kiln. There was very little fusing of pots in the tumble stack due to excessive accumulation and melting of ash. We were going to attempt to cool the back in a reduced environment (for iron rich clay bodies) while allowing the front and middle to stay in an oxidized to neutral environment (for bright porcelain and lighter stoneware bodies), but it was ultimately decided that it was not worth the risk of muddling the brightness of the clay bodies and glazes in the middle and front sections (which hold the largest amount of pots by far).

{{post id=”soulgama-oct-2007-pics-vids” text=”Pictures and Videos”}} (Includes links to download the full sets)