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Politics : Welcome to Slider's Dugout -- Ignore unavailable to you. Want to Upgrade?

To: arun gera who wrote (17279)	5/7/2009 12:32:15 AM
From: jmiller099	Read Replies (3) \| Respond to of 50172

House is already geotagged by mapping data provided by satellite images and a little math. Navteq and TeleAtlas have vast amount of lattitude/longitude associated with residential zones, business, and so forth. The earth is roughly a sphere, so the data in WGS84 can be converted to degrees and then some SIN/COS/etc based formulas can get a darn accurate spot to ID the house. Even with a flat-earth formula in linear geometry they could provide a fairly accurate representation. They can get more granular than both by combining with topology data that's been mapped out in satellite as well. The census exercise will just be another database with info stored that could have been extrapolated mathematically from other info they can already access. As someone pointed out, it is likely a spying on employees exercise more than anything. Ensuring they land on the doorstep instead of shirking their duty. Once they prove they're on the doorstep, odds are they will knock or ring the bell.