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Are there any elevation maps available for cities, where the elevation
data includes the buildings?
A search on Yahoo for "city elevation maps" came up with lots of
elevation maps and lots of city maps, but no maps (that I could see)
that include building elevations.
Looking mainly for San Diego and Los Angeles.
And what do "1 degree", "30 minute", "10 minute", and "5 minute" mean?
Can they be directly translated into feet/meters/kilometers?
Jerry
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On Fri, 15 Sep 2000 09:14:47 -0700, Jerry wrote:
>And what do "1 degree", "30 minute", "10 minute", and "5 minute" mean?
>Can they be directly translated into feet/meters/kilometers?
That's the size of the square represented by the map. 1 degree of latitude
is about 70 miles or so. 1 degree of longitude depends on your latitude;
multiply 70 miles by the cosine of the latitude. For most of the continental
US, a degree of longitude is about 50 miles, so a 1-degree map is about
50 miles wide by 70 miles tall.
30 minutes is half a degree, 10 minutes is one-sixth of a degree, and
5 minutes is one-twelfth of a degree.
--
Ron Parker http://www2.fwi.com/~parkerr/traces.html
My opinions. Mine. Not anyone else's.
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Jerry wrote:
>
> Are there any elevation maps available for cities, where the elevation
> data includes the buildings?
>
Probably not, such a high resolution would require obtaining them from stereo
air photographs, and doing this in city areas with high buildings would probably
not lead to usable results.
>
> Looking mainly for San Diego and Los Angeles.
>
> And what do "1 degree", "30 minute", "10 minute", and "5 minute" mean?
> Can they be directly translated into feet/meters/kilometers?
>
> Jerry
That means degrees of geographical coordinates, translation to km depends on
geographical latitude. minutes are parts of degrees (1 degree=60 minutes)
Christoph
--
Christoph Hormann <chr### [at] gmx de>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/
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I've done a fair amount of dealing with GIS systems and I have
never come across what you are asking for. And I've looked at
40-50 sites with mapping data.
Jerry wrote:
>
> Are there any elevation maps available for cities, where the elevation
> data includes the buildings?
>
> A search on Yahoo for "city elevation maps" came up with lots of
> elevation maps and lots of city maps, but no maps (that I could see)
> that include building elevations.
>
> Looking mainly for San Diego and Los Angeles.
>
> And what do "1 degree", "30 minute", "10 minute", and "5 minute" mean?
> Can they be directly translated into feet/meters/kilometers?
>
> Jerry
--
See my Free stuff page. It compares free website providers, and
lists free internet access providers.
http://www.crosswinds.net/~robertsc/free.htm
Win98 help file loaded with hints and tips, including securing a
Win 95/98 PC in a classroom setting. VB4 help file with lots of
code and hints.
At http://www.crosswinds.net/~robertsc/
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