geomantic

Remember say, 1996? When brave and crafty individuals cobbled (clobbered?) together pages with lots of blinky clip art?

And, remember 2004 when blogs were sprouting like mushrooms after a rainstorm? That was back before Twitter and Facebook took the wind out of blogging by making it easy to blurt whatever comes to mind.

Last week, I blogged about Open Street Map over on my company’s blog, The Viewshed about Open Street Map and touched briefly on the subject of data quality. I cited the study by Muki Haklay that compares (favorably) the quality of data found in OSM with Ordnance Survey data. More on the subject of OSM data quality is found here on Stefan Knecht’s blog, United Maps. Not a formal study, but a another perspective on OSM, both its successes and it’s current limitations. I find the comparison with Wikipedia to be most illuminating because it shows where the similarities end and where OSM differs from Wikipedia.

Recently released by members of the MIT Media Lab in Cambridge, MA comes this code that uses Geographic Style Sheets (GSS) to drive the map rendering process for web maps in native HTML 5. What this means, according to the developers, is that individuals can style their own maps enabling them to create and communicate their own narratives. Also, users can access and style data streams to view edits in real-time to provide a very rich and dynamic cartographic display. An example from  Open Street Map is provided on the Cartagen web site. And, oh by the way, Cartagen is an open source project with resources for developers on the project wiki.

I still have to experiment more to fully understand the potential of this project. I tried Cartagen briefly using in Firefox 3.5, I was immediately asked if I wished to allow Cartagen to use my location. After I granted the permission, I typed ”Washington, DC” into the text box labeled ‘Go Somewhere’. It quickly brought my browser to its knees and sent my processors into overdrive. Need to work with this a little more…

Just released by the City of Alexandria (VA) Department of Recreation, Parks and Cultural Activities’ Horticulture and Natural Resources Section is this survey (.pdf) of the native plants of Alexandria. The survey was conducted from 2002 to 2007 and yielded a total of 810 native species (including infra-specific taxa and hybrids) representing 374 genera and 128 families. Accompanying the study is a presentation loaded with photographs new and old documenting the natural history of Alexandria and environs, as well as a geological map of the surficial  geology annotated with place names, old and new.

This is a tremendous resource for those trying to restore habitat or simply replicate the native vegetation in suburban landscapes in and around Washington, DC. I applaud regional field ecologist Rod Simmons, the primary author of the report for his devotion to place, to science, and his contribution to the understanding and preservation of the natural habitat of the Washington area.

1. Ostensibly devoted to Flash Flex and other Rich Internet Applications (RIA) is the Flexmappers blog.

2. The Transport Politic focused on rail transport and other alternatives to automotive transport.

3. Related to Transport Politic is Streetsblog.net which aggregates some of the nation’s best bloggers on sustainable transport to carry out a discussion place and learning center.

4. How might the open source revolution affect higher education? That question is explored in depth in the publication, The Tower and the Cloud available for download (.pdf) in whole or by the chapter.

Not too long ago, Upton Tea was having trouble sourcing Yunnan Gold tea because most of the production had shifted to Pu Erh teas. Well, now the bubble has burst and the effect on the composition of Yunnan’s tea production is anybody’s guess.  In my experience, there is some basis for the health claims made for Pu Erh teas, but I think most of it is psychological. Not that I care. I’m as succeptible to the placebo effect as anyone. But there is nothing like Pu Erh when you have a hangover or a particularly stressful day.  The market for Pu Erh will recover, or at least return to something more rational, eventually. I simply hope that the farmers can hang on without having to forgo much of their newfound prosperity.

A County in China Sees Its Fortunes in Tea Leaves Until a Bubble Bursts – NYTimes.com

This is a good thing for both the standards setting community and the open source community:

OGC and OSGeo Sign Memorandum of Understanding | OGC®

With respect to goals and objectives, both communities have an obvious  natural affinity. I’m encouraged to see this finally happened.

From Boston.com, an interesting piece of journalism about the growing ubiquity of maps. The article cites several examples of  the effect of this ubiquity, which can be applied for good (monitoring global climate change) or bad (Mumbai siege).

Incidentally, I posted a while back about the cartograms from Mark Newman. Newman quite accurately sums up the explanatory power of the cartogram:

Mark Newman, the University of Michigan physicist who created the algorithm responsible for the best-known election cartograms, coauthored a book this year that uses cartograms to illustrate hundreds of global trends, from immigration flows to carbon dioxide emissions to Internet use. Surprises abound. Spain leaves a large footprint in book publishing, but dwindles to insignificance when it comes to library use. A map of the world’s rabies deaths is little more than a giant, bloated nation of India – which also dominates the world in movie viewing.

The value of the cartogram, Newman argues, is its simplicity. Even a color-coded map, after all, requires a legend. But cartograms embed information in the contours of the map itself, using our assumptions about maps, and our familiarity with the actual shape of the world, to drive home the point.

“You don’t have to learn how to read these maps,” Newman says, summing up, in a sense, the whole enterprise of mapping. “You look at it and it makes sense.”

A cartography boom offers new ways to see the world – The Boston Globe

Happy New Year, everyone!

Very interesting animation of the growth of Wal-Mart’s store locations. It would be interesting to see an accompanying real-time graph with some statistical interpretation, such as rate of growth, sales volume, revenue, etc.

Watching the Growth of Walmart Across America

I accidentally bumped into this site whose purpose is “crowd-sourcing crisis information”. (Sorry; bad metaphor.) Initial deployments still in alpha, but should be interesting to follow in the coming months, especially in light of the value demonstrated by the Twitter platform during the recent siege in Mumbai.

Ushahidi :: Crowdsourcing Crisis Information (FOSS)