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Painting the Web
book

Painting the Web

by Shelley Powers
May 2008
Beginner content levelBeginner
656 pages
17h 41m
English
O'Reilly Media, Inc.
Content preview from Painting the Web

Living Within the Geoweb

It's surprising how much of our everyday lives is associated with locations. Where we live, where our friends live, work, shopping, and entertainment—all have a location. Some of these locations are interesting to people outside our local sphere, and some are not. Among the locations of interest:

  • The location of an event or party we're invited to

  • Addresses for friends and family members

  • Where a photo was taken

  • Locations for great coffee shops, restaurants, parks, etc.

  • Where something important is happening now

Finding Longitudes and Latitudes

Before you even begin to work with mapping tools, you need the ability to "map" between an address and its associated longitude and latitudes. Some of the map APIs work with addresses, but support is limited. Most of the mapping APIs work best with longitude and latitudes, but we don't always run around with GPS devices capturing these values as we travel about.

There are sites online that provide both values when given an address. Figure 14-9 shows the results from one of the more comprehensive of these sites, MelissaDATA (at http://www.melissadata.com/Lookups/addressverify.asp). The page not only provides the longitude and latitude, but also information about political representatives, school zones, police stations, postal data, and so on. Another site, maintained by Stephen Morse (at http://stevemorse.org/jcal/latlon.php), provides a results page from a lookup on addresses at various sites. It also provides a link to the ...

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Publisher Resources

ISBN: 9780596515096Supplemental ContentErrata Page