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How to draw these

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  How to draw these Cecil Westerhof <Cecil@decebal.nl> - 2014-09-06 14:27 +0200
    Re: How to draw these jdaw1 <jdawiseman@gmail.com> - 2014-09-06 10:21 -0700
    Re: How to draw these tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2014-09-06 13:55 -0400
    Re: How to draw these luser- -droog <mijoryx@yahoo.com> - 2014-11-16 23:29 -0800
      Re: How to draw these Cecil Westerhof <Cecil@decebal.nl> - 2014-11-18 21:59 +0100
        Re: How to draw these jdaw1 <jdawiseman@gmail.com> - 2014-11-30 03:56 -0800

#2029 — How to draw these

My geometry day are in a grey history. I would like to draw things
like:
    http://www.mapthematics.com/Essentials/Images/04_Stretches.png
and
    http://www.mapthematics.com/Essentials/Images/09_Graticule.png

Is there a good site to learn yourself to make things like that?

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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#2030

The difficult step is rotating the lat-long to a new position. 
http://www.mathworks.se/matlabcentral/fileexchange/43435-rotated-grid-transform 
That done, it's easy to transform to a flat view as see from original north pole. 

Then it's easy to do with lots of little line segments. Some heuristics might allow shrinkage of file size by using curves.

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#2031

On Sat, 06 Sep 2014 14:27:50 +0200, Cecil Westerhof wrote:

> ... things
> like:
>     http://www.mapthematics.com/Essentials/Images/04_Stretches.png
> and
>     http://www.mapthematics.com/Essentials/Images/09_Graticule.png
> 
> Is there a good site to learn yourself to make things like that?

For a firehose-streamful of candidate sites feed your favorite search
engine with [ Wolfram alpha geometry ]. HTH. Cheers, -- tlvp
-- 
Avant de repondre, jeter la poubelle, SVP.

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#2096

On Saturday, September 6, 2014 7:41:39 AM UTC-5, Cecil Westerhof wrote:
> My geometry day are in a grey history. I would like to draw things
> like:
>     http://www.mapthematics.com/Essentials/Images/04_Stretches.png
> and
>     http://www.mapthematics.com/Essentials/Images/09_Graticule.png
> 
> Is there a good site to learn yourself to make things like that?
> 

Bill Casselman's Mathematical Illustrations, ch 8.
covers map projections.

http://www.math.ubc.ca/~cass/graphics/manual/pdf/ch8.pdf
warning(?) 2.41 MB

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#2098

Op Monday 17 Nov 2014 08:29 CET schreef luser:

> On Saturday, September 6, 2014 7:41:39 AM UTC-5, Cecil Westerhof wrote:
>> My geometry day are in a grey history. I would like to draw things
>> like:
>> http://www.mapthematics.com/Essentials/Images/04_Stretches.png
>> and
>> http://www.mapthematics.com/Essentials/Images/09_Graticule.png
>>
>> Is there a good site to learn yourself to make things like that?
>>
>
> Bill Casselman's Mathematical Illustrations, ch 8.
> covers map projections.
>
> http://www.math.ubc.ca/~cass/graphics/manual/pdf/ch8.pdf
> warning(?) 2.41 MB

Downloaded. Now I have something to do this weekend. ;-)

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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#2103

Apologies for the late reply. 

You might be able to use the code linked from 
http://www.jdawiseman.com/papers/placemat/postscript_routines.html#transformpath 
which I was using to apply complicated transformations to paths made by charpath. 

Good luck.

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