Mapthematics Forums

There is a reason that the exponent of 2.5 was "Tobler's favorite"; that's because it's the exponent used by Piet Hein when he famously proposed the hyperellipse as a shape intermediate between the true ellipse and the rectangle.

Oops! I didn't notice the white coastlines, they were so inconspicuous. Fortunately, the hard part was making the oblique equirectangular map correctly. Re-doing the last step with the coastlines as well as the graticules turned off will be easy. It's fixed now: http://www.quadibloc.com/maps/images/...

After once trying to create this kind of image for my web page, and failing, recently, I tried again, and this time my efforts were crowned with success. http://www.quadibloc.com/maps/images/swo_rel.jpg Using a version of ETOPO as the base map, and first using "oblique equirectangular" to ...

In case it may be helpful, on my web page, at
http://www.quadibloc.com/maps/mcf0702.htm
I give Snyder's formula for the Eisenlohr, and I also have drawings of both the alpha component and the beta component.

...What if you change the scale bar's label from "Scale:" to "Scale at center:"? Only takes a few extra characters, not a lot of space, but it gets the point across. If you've zoomed out so far that, say, 10 degrees South Latitude is visible in the map, which is on the Mercator ...

or "rithəm" where the second vowel is a schwa I don't want to stray too far off topic here, but I will note that I basically don't acknowledge the existence of the schwa as a vowel in English. Instead, I treat that vowel, when it is indicated in a dictionary, as some short vowel, such as ...

I went though exactly this debate implementing a scale bar at my place of employment on Web Mercator maps. I argued that the scale bar should go away when you zoom out too far. The product manager decided that no, we can’t do that: it would confuse people. I said that they’re going to be confused a...

Simple scaling in the y direction is extremely easy to do on computers. I don't consider avoiding that to be a good reason to use Mercator, especially if you're already using other basic transformations like cropping, or switching to an azimuthal projection near the poles (actually more complicated...

It’s not uncommon to see even regional or local maps with the ugly, deceptive horizontal stretching characteristic of mid and higher latitudes on that projection. If they adjusted the projection to the latitude, plate carree would be just fine for small-scale maps. If they can't be bothered to do t...

I don’t recall ever seeing astronomical use of the Hammer outside of “the celestial sphere”, as in some star maps for astronomy, rather than cosmology. It is true that one famous astronomical use of the Hammer is the painting created by the Lund Observatory. But I remember seeing the Hammer quite f...