Chile Earthquake Moved Entire City 10 Feet to the West
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Re: Chile Earthquake Moved Entire City 10 Feet to the West
#2I wonder what happens to all the lat/lon locations fetched using GPS and the such on flickr, etc, they're all 10 feet off now..
Re: Chile Earthquake Moved Entire City 10 Feet to the West
#3I wonder what happens to all the lat/lon locations fetched using GPS and the such on flickr, etc, they're all 10 feet off now..
Or navigation systems using GPS? 10 feet is enough to confuse navigation systems used in automobiles. I wonder how quickly the map makers will update their databases and turn around sell the update?
Re: Chile Earthquake Moved Entire City 10 Feet to the West
#4also of interest - people have started investigating who built the worst damaged buildings - http://babelfish.yahoo.com/translate_url?doit=done&tt=ur...
original - http://ciperchile.cl/2010/03/06/estas-son-las-constructoras-...
Re: Chile Earthquake Moved Entire City 10 Feet to the West
#5What does that do to surveyed property lines?
Re: Chile Earthquake Moved Entire City 10 Feet to the West
#6What does that do to surveyed property lines?
Not much, since most of the reference points relative to which the property lines are measured will have moved as well.
In most cities those are hollow nails in the pavement that you can set up a surveyors theodolite on.
Re: Chile Earthquake Moved Entire City 10 Feet to the West
#7I wonder what happens to all the lat/lon locations fetched using GPS and the such on flickr, etc, they're all 10 feet off now..
Or navigation systems using GPS? 10 feet is enough to confuse navigation systems used in automobiles. I wonder how quickly the map makers will update their databases and turn around sell the update?
Civilian GPS isn't that accurate at the best of times and needs to be robust for times when it can't get clear views of the sky. A 10ft shift shouldn't trip it up.
Wikipedia says 50-15 feet of inaccuracy:
http://en.wikipedia.org/wiki/Global_Positioning_System#Error...