AUTOREPLY Re: [Proj] Map Projection Amusements and Other Things

[jens.schwarz at alpstein.de]

Sehr geehrte Damen und Herren,

da ich mich bis einschließlich 24.08.07 im Urlaub befinde,
ist es mir leider nicht möglich Ihre e-mail persönlich zu beantworten.

Ab Montag,27.08.07 bin ich wieder im Büro und werde mich baldmöglichst
um Ihr Anliegen kümmern. 

In dringenden Fällen wenden Sie sich bitte an meinen Kollegen, Herrn Martin Soutschek, unter  martin.soutschek at alpstein.de

Vielen  Dank für Ihr Verständnis.

Mit besten Grüßen aus Immenstadt

Jens Schwarz
Fachbereich Technologie & Produkte
      
Alpstein GmbH                      
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fon  08323-8006-0 
fax  08323-8006-50
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info at alpstein.de


Thanks Mr. Anderson. Very interesting and funny pictures, and also a 
very useful site.

Jan Hartmann

Dr. J. Hartmann
Department of Gepgraphy
University of Amsterdam

Paul B. Anderson wrote:
> - Hi Everyone,
> 
> In regard to recent discussions on cylindrical map projections, I 
> thought I would toss a 'tangent' thought into the mix.
> 
> Years ago, due to being confused myself, I researched the available 
> literature for cylindrical map projection formulas. I eventually gave 
> the notes I made to Gerald Evenden and he greatly expanded on them. 
> Chapter 4 of his Libproj4 Manual (Mar 2005), in my 'obviously biased' 
> opinion, is the best reference one can find on cylindrical map 
> projections. Enough said on that subject!
> 
> BTW, daan Strebe I just recently came across your Oct 06 CaGIS Map 
> Projection article. Thanks for mentioning me!
> 
> I've recently recovered enough from medical problems to be able to 
> resume, as a student, a 'GIS Certificate' course at ODU so that I could 
> learn 'ArcGIS 9.2'. My new Instructor, for some reason, was not amused 
> to learn that the textbook she chose for the class (ISBN: 0-13-129317-6) 
> features some of my graphics on page 44. Regretfully, there are at least 
> 4 author introduced errors on that page alone.
> 
> Some graphics:
> On the MapHist list-serv in 2005 someone made a comment about a map 
> based on the phrase 'The World is my Oyster'. I replied with the 
> following comments. Note that my claim here is that the graphics below 
> are merely visually interesting, however, for most of them the forward 
> formulas are available.
> 
> This one was where I was experimenting with summing the X and Y 
> coordinates of different graticule groups just to see what developed:
> http://www.galleryofmapprojections.com/images/seashell.pdf
> 
> Everyone that experiments with map projection formulas comes up with 
> unexpected, but visually interesting mistakes. Here are some more of my 
> 'amusements':
> 
> This one was where I was experimenting with the Nell Modified Conic -- 
> until I realized that Snyder's description (in Flattening) was 
> incomplete. The pattern produced in what I had already done just popped 
> out at me, so, I cleaned the graphic up (lots of grunt work) in Corel 
> Draw and saved it:
> http://www.galleryofmapprojections.com/images/Mickey.pdf
> 
> Dr. Don Zeigler (Geog Dept, ODU) named this one the Bay Window 
> projection. It was one of my earliest goofs. Even though I saved the 
> formulas, I don't remember how I arrived at this one:
> http://www.galleryofmapprojections.com/images/baywindow.gif
> 
> This one came about because I accidentally put the divide symbol in the 
> place of the subtract symbol in the X coordinate portion of Moir's 
> formulas. At that time I had not seen an actual graphic of the 
> projection and John Snyder was the one who caught my error. He suggested 
> I save the formulas and name it the 'Bad Times' projection:
> http://www.galleryofmapprojections.com/images/badtimes.gif
> 
> This Polycylindrical projection came about from experimenting with 
> various Y coordinate formulas in place of the ones Dr. Tobler used in 
> his paper on Polycylindricals. I kept it because it was 'visually' 
> interesting.
> http://www.galleryofmapprojections.com/images/polycyl.gif
> 
> I did not give this one a name. It is amazing in that with one set of 
> formulas the outer portion of the graticule forms a rectangle while the 
> parallels within are curved:
> http://www.galleryofmapprojections.com/images/Wvplt31.gif
> 
> A link to Gerald Evenden's Libproj4 Manual that I mentioned above can be 
> found at my web site.
> 
> Thanks for reading.
> Paul B. Anderson FCCS (USN, Retired)
> Kingsport, TN native living in Norfolk, VA
> http://www.galleryofmapprojections.com
> 
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