Steve Chilton of Middlesex University recently created a cool map in GeoCommons comparing street coverage for OpenStreetMap (OSM) and Google/TeleAtlas in several cities across the globe. It provided a fascinating perspective and thought it would be cool to share it with the community.

The project began with work by Bernard Zwischenbrugger to visually compare coverages between OSM and Google/TeleAtlas. Then Alex Mauer picked up the ball and did a numerical analysis of coverage. Steve then took Bernard’s original visual comparison (location data) and Alex’s scoring (numerical comparison) and produced a map to visualize the results of the comparison:

The size of the circles are proportional to the values for both, so small circles equal poor coverage and large circles equal good coverage. The overlap of the circles shows who appears to be doing better (orangey/brown showing means that osm is doing better, blue google). OSM is the top layer so a tie will have OSM looking better, but you can click the layers on and off to see both views of the coverage.

Alex’s original assessment was that OSM is slightly ahead of Google/TeleAtlas worldwide and in in Africa and Asia. In Europe, OSM is well ahead. Google is slightly ahead in Oceania, and well ahead in North and especially South America.

Steve would have liked to be able to show results on a combined scale from +5 (for osm 5, google 0) to -5 (osm 0, google +5), with 0 for equal, but we do not yet ha ve a bi-polar colour scale for point data in the software. A great suggestion for future development.

It will be interesting to see how Google’s launch of MapMaker for 162 countries will impact this comparison in the future. Many thanks to Steve for loading the data into Finder and making cool maps with it.

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With the elections over I’ve had a little time to think about what the new administration could mean for the GeoWeb. For those who follow the GeoWanking list serv there has been a raging debate on neogeography versus paleogeography. Some of the rhetoric reminds me of the just finished election and how we strive to create a binary world - blue state/red state or neo/paleo. In the spirit of moving beyond stereotypes and on to solving problems; I thought a closer look at what the potential impact of Obama’s technology platform on the GeoWeb could be. Might be a good diversion from our own self reflection - despite the fact I’ve added plenty of fuel to that fire

You can read Obama’s technology platform overview here. The plank that really grabbed my attention was the promise to “Open Up Government to its Citizens”. The idea that data about government (Congressional voting records) and created by the government (census data) should be easily available to the public. Specifically:

“Making government data available online in universally accessible formats to allow citizens to make use of that data to comment, derive value, and take action in their own communities. Greater access to environmental data, for example, will help citizens learn about pollution in their communities, provide information about local conditions back to government and empower people to protect themselves.”

The beauty is that we (the collective GeoWeb) have so many of these tools already built. The ability to deliver the data once it is made easily available has great promise. For instance here is EPA data on power plant emissions from GeoCommons:

From the map above you can see which power plants are producing the most poisonous CO2 emissions (click the down carrot on the layers box for the filter) or zoom into your specific neighborhood to see the plant and the type of environment around it. (Still refining the embed capability, but an example of how data can be virally spread).

The report goes on to recommend that the federal government should:

“Establishing pilot programs to open up government decision-making and involve the public in the work of agencies, not simply by soliciting opinions, but by tapping into the vast and distributed expertise of the American citizenry to help government make more informed decisions.“

This strikes again at the heart of the GeoWeb - enabling collaboration of experts and citizens across the country. Several projects and companies have pioneered dynamic collaboration around maps. Below is a Google MyMap with feedback around the GeoCommons power plant data in Florida”

View Larger Map

The blue push pins are the user generated feedback linking to expert opinion and photos from the field. This is just the tip of the iceberg of what is possible with collaboration around maps. These approaches can also be leveraged inside of government agencies, which is another plank in the Obama technology platform:

“Employing technologies, including blogs, wikis and social networking tools, to modernize internal, cross-agency, and public communication and information sharing to improve government decision making.”

We’ve seen a lot of this type of work going on in the intelligence community with Intelink, Intellipedia, and A-Space. There is also data fusion and sharing concepts, like the EPA’s Central Data Exchange. I’d love to hear other projects that fit in with the three planks, and more importantly existing or planned GeoWeb technologies that could help enable the new vision. I’ve really only highlighted two and I know there are tons more out there.

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The Google GEO APIs team developed a KML Interactive Sampler page. Now people, who want to learn KML, can learn by examples. The Sampler page uses the Google Earth Plugin to demonstrate various features while displaying KML code.

Next week, George Mason University and the University of Virginia are celebrating GIS Day(s). They invite the general public to their GIS festivities. GMU’s featured speakers include Carmel Menzel, ESRI and Justin Procopio, National Geographic Society. David Rumsey, an expert on historical maps, will speak at UVA’s GIS Day.

The Google Maps API terms of service is causing the Ordnance Survey grief. The OS was unhappy with local authorities signing up to the Google Maps API terms of service as it required a “broad” re-licensing of the data to Google and the users of Google maps based sites. According to the OS, Show Us a Better Way broke copyright regulations by embedding info on Google Maps that was “derived” from OS data. Yesterday, Google released an updated Terms of Service for both Google Maps and Earth. For OS’ sake, the new published terms should help solve this issue.

Google announced the Google Geo Challenge Grants. The challenge encourages organizations, especially non-profits, to use maps as mediums to communicate issues and implement plans. The grants range from US$5,000 and US$100,000. For more the challenge guidelines, visit the Geo Challenge page.

Yesterday was “Make Slashgeo Known to the Community Day!” We encourage our readers to also show their support for our fellow GeoFriend!

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We’re wrapping up a great time at GEOINT this week, and wanted to share just a few short posts that caught our attention about the show. Sean Gillies gives his hilarious opinion of the GEOINT blog, while All Points Joe Francica shared a biting commentary for one vendor who denied him a picture. In all seriousness, it’s great that GEOINT has taken steps to be plugged in to social media through their blog, Twitter account and Facebook group. Although, it would have been nice to hear about the blog before the announcement on Tuesday so that people could connect online before the show.

Google Earth for the iPhone came out this week, and it’s pretty slick. A really cool feature is that Google Earth is available in offline mode through the iPhone and desktop by simply choosing to “continue without network”. It also remembers your cache, so any searches or locations you have viewed in the past will transfer between desktop and phone with or without internet connection.

Just in time for Halloween, Virender at Mibizaar posted a mashup with the creepiest places on earth. Bhangarh, India topped the list. Very Spatial listed some data of all the corn mazes in the country. Something fun for everyone!

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