mapping

Here’s an interesting GeoPlace.com article on open source GIS tools, including GIS extensions to PosgreSQL and MySQL. Via The Map Room.

It would reasonably appear that here in the US, there’s only one map site: good ol’ Google. But until Google adds maps for countries other than the US, Canada, and UK, the rest of the world will have to look elsewhere. Enter the UK competitor: Multimap.com has been serving the world outside the bubble since 1996. From their self description:

Key features include street-level maps of the United Kingdom, Europe, and the US; road maps of the world; door-to-door travel directions; aerial photographs; and local information.

In short, it’s probably the best place to point any random set of coordinates. Example: my story about the Chernobyl tour should probably have included this street map of the region. (Yes, Google will now give me a low resolution satellite photo of the reactor, but photos and maps offer different value for different uses.)

My only complaint is that the service lacks the AJAX features that make Google Maps so great. But that might be changing. A post at The Map Room tells of a new feature for UK regions: a map overlay follows the mouse on aerial photos. Take a look at this example. Nice trick, eh?

Old news from Gizmodo and Wi-Fi Networking News (quoting WiFi NN):

Skyhook has assembled a database of information about 1.5 million access points across 25 major cities in the U.S. by driving every street in every city. Their software records multiple data points per sample for directionality. Fire up their software on a laptop, and it compares the Wi-Fi information it sees with what’s in the Skyhook database, popping out a latitude and longitude within 20 to 40 meters.

Also geolocation related: Monopoly Live: London style.

We don’t need to hack Google Maps anymore. Now that Google has released a public maps API, we can make more reliable map-dependent apps (which will now have better browser compatibility, thank you). Within a few minutes of signing up for a maps API key I had put together the following of the Nevada Test Site Tour.

Yeah, click the satellite button, scroll, zoom… It’s real.

The API is all JavaScript, but I use a bit of PHP to iterate through an array of points and generate the code that puts the lines and pins on the map.

The most frustrating development with the Google Maps API is that each developer key is limited to a certain hostname and directory. It’s sensitive to things like “maisonbisson.com” instead of “maisonbisson.com” or “maisonbisson.com/post/10594” instead of “maisonbisson.com/blog/” . That’s why this is loading in an iframe.

Thanks to The Unofficial Google Weblog for the tip that the API was released yesterday. As a minor coincidence, Yahoo! also released their maps API this week. Damn.