April 21, 2011

Blog to Watch: Under Dark

If you’re interested in Open Source GIS and especially QGIS, I highly suggest you give the blog “Under Dark” a read - the author seems to be very clued in the latest developments, and the blog is very active.

April 19, 2011

Getting Started with Open-Source GIS: Primer

I was talking to some friends at school tonight, and I realized what a barrier it can be to actually get some of the open-source geospatial tools I’ve talked about on this blog going. So I’m going to start a series about how one can get started with these tools, from a level-zero technical knowledge (of course, I assume basic GIS knowledge—if you know what I mean when I say buffering, geocoding and vector analysis, you’re fine).

April 6, 2011

Basemaps in QGIS

**Update 2012-02-02 17:57 -0800:I just wrote a post about another way to do this. I really like QGIS. It’s a powerful GIS that runs on Linux (among other operating systems) and doesn’t require incredible amounts of CPU. One criticism I had of it was that it did not provide the same ‘click-and-go’ basemap experience one can get with ArcGIS for making simple maps (i.e. Add Basemap, select Bing, DeLorme, &c. and you’re done).

April 2, 2011

Plug: Google Fusion Tables

Google Fusion Tables is a fairly new service many may not have heard of: it lets you manage large tabular datasets in the cloud, using Google’s infrastructure. You can then visualize that data in a variety of ways, including a Google Map. The coolest feature in my mind is the ability to geocode addresses to a map on the fly. There are lots of datasets out there that, rather than providing a mappable latitude and longitude, provide an address column (or street, city, state, &c.

April 2, 2011

Agencies Providing Real-Time Data

As a part of the Transit Appliance Project, I’ve been evaluating what transit agencies have real-time data; here’s a (non-exhaustive) list, focused primarily on U.S. agencies (note: these are only agencies that provide an API, not any agency with a real-time feed): TriMet, Portland, OR, custom JSON[-P] feed, XML may also be available. GTFS-realtime is also available. San Francisco Muni, via NextBus. Bay Area Rapid Transit (BART), San Francisco, CA, custom XML feed.