comp.lang.idl-pvwave archive: archive » map_proj

Home » Public Forums » archive » map_proj_* help

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: map_proj_* help [message #66843 is a reply to message #66805]

Fri, 12 June 2009 13:38

R.G. Stockwell
Messages: 363
Registered: July 1999

Senior Member

"Bruce Bowler" <bbowler@bigelow.org> wrote in message
news:79fm8nF1q8fprU2@mid.individual.net...
> On Fri, 12 Jun 2009 18:43:45 +0000, I wrote:
>
>> position to the 6th decimal place is claiming accuracy of less than 4
>> inches. The smallest pixel size that I'm aware of (this is where the
>
> My bad, make that slightly more than 4 inches (4.3748031496 to be
> precise :-)

This precision problem is apparent in google earth as well.
During a google earth conference, I pointed out that the number
of decimal points shown in google earth implied resolution on
the order of a centimeter. Therefore they could distinguish one
side of my laptop from the other. And that is when the entire earth
is in view (and hence the crosshairs with which the user selects
co-ordinates are drawn to be probably 100 km wide, in that view).

My point fell on deaf ears though. Bunch of comp sci people apparently.
If there were more physicists there, surely their heads would have exploded.

cheers,
bob

PS "Sig dig!!" in red ink

Report message to a moderator

[Message index]

		map_proj_* help By: mankoff on Sun, 07 June 2009 09:55
		Re: map_proj_* help By: R.G. Stockwell on Fri, 12 June 2009 13:38
		Re: map_proj_* help By: David Fanning on Fri, 12 June 2009 13:09
		Re: map_proj_* help By: mankoff on Fri, 12 June 2009 13:03
		Re: map_proj_* help By: David Fanning on Fri, 12 June 2009 12:49
		Re: map_proj_* help By: David Fanning on Fri, 12 June 2009 12:40
		Re: map_proj_* help By: David Fanning on Fri, 12 June 2009 12:32
		Re: map_proj_* help By: David Fanning on Sat, 13 June 2009 14:09
		Re: map_proj_* help By: David Fanning on Fri, 12 June 2009 11:51
		Re: map_proj_* help By: Bruce Bowler on Fri, 12 June 2009 11:48
		Re: map_proj_* help By: Bruce Bowler on Fri, 12 June 2009 11:43
		Re: map_proj_* help By: mankoff on Fri, 12 June 2009 11:28
		Re: map_proj_* help By: David Fanning on Fri, 12 June 2009 11:16
		Re: map_proj_* help By: David Fanning on Fri, 12 June 2009 08:47
		Re: map_proj_* help By: David Fanning on Mon, 15 June 2009 14:46

Previous Topic:	idl encoder/decoder of json
Next Topic:	Re: file_search: need work around for filenames with square brackets [ ]

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sun Oct 12 02:32:41 PDT 2025

Total time taken to generate the page: 1.60500 seconds