Enceladus — for counting craters

May 11, 2016

This map corrects map-boundary imperfections in the earlier Enceladus maps.

Note the smoother curve at the both pole (left and right tips of the map), and the tangent-to-the-vertical cusp.

Enceladus centered on the north pole

Enceladus centered on the north pole

another how to . . .

April 24, 2016

. . . especially for the NASA SpaceApps VESTA REVEALED Challenge.

Here is an image from the SpringerBrief on how to prepare a segment for correct internal proportions:

Boundaries as feature edges treated as metes and bounds, transformed and reconnected using hinges and elbows

Boundaries as feature edges treated as metes and bounds, transformed and reconnected using hinges and elbows

How to . . .

April 19, 2016

If you are one of the problem solvers is the 2016 NASA Space Apps Challenge (https://2016.spaceappschallenge.org), specifically the Solar System and Beyond challenge Vesta Revealed (https://2016.spaceappschallenge.org/challenges/solar-system), this post is for you.

Here are two plates, from the monograph cited in the resources, showing what I mean by a tree, and how to convert a tree into a closed shape, a map with constant scale natural boundaries.

CSNB mapmaking using Mars' troughs (a) and ridges (b). The resulting maps will display Mar's watershed from complementary perspectives

CSNB mapmaking using Mars’ troughs (a) and ridges (b). The resulting maps will display Mar’s watershed from complementary perspectives

Making a closed shape from the trees via unzipping and hinging, as described in the NASA Apps Challenge resource. See "Mars, How the Water Runs" page (in the menu at right)

Making a closed shape from the trees via unzipping and hinging, as described in the NASA Apps Challenge resource. See “Mars, How the Water Runs” page (in the menu at right)

Enceladus “B” large file

March 16, 2016

Here’s the map in near-maximum resolution. (Click on map for full-size version)

(You might have to open it in a photo-editing software such as Photoshop. I have trouble opening this in Mac Preview.)

(Not sure if this will work; it’s the largest file I’ve yet posted.)

(Yeah. Doesn’t want to open on screen. Try right-clicking on the map and select “download linked file.”)

Suggestions welcome for how to fix this posting glitch. EDIT: the download problem appears to be native to my home computer. Enjoy the map!

Enceladus-30x63 ChuckClark2016

Enceladus gets another custom projection

January 13, 2016

Enceladus D_Titled_postI had to make up the projection. Long story. Summary is that the cut (the edge of the map) is 270˚ (three-fourths of a circle).

The purpose was to put the tiger stripes, the south polar district, into global context. Other compact maps were either unable to make the polar region large enough, relative to the nether regions, or the map periphery went squirrelly.

The cut can turn on 45˚ increments, which has the effect of rotating the stripes around the pole; the lobes refocus from leading and trailing hemispheres (the posted map) to anti- and sub-Saturnian hemispheres.

A really large version is in the works. Maybe by March, knock on wood.

Here’s what the grid looks like:

with a little Photoshopping, you could make your own! Hmm . . . would this projection be of any use on another planet or moon? Pseudo-Eisenlohr Grid

For instance, here’s the projection applied to Earth (not that you need to know where is San Luis, Argentina!). Not so useful because of the longer interruption.

Enceladus-Earth 2016

Here’s a daisy-petal foldable map of Pluto . . .

December 20, 2015

. . . in case anyone has been wanting one.

noncommercial use allowed

noncommercial use allowed

The mosaic is based on the July release, so I expect NASA will have something better for us soon.

Spaces & Illusions

October 9, 2015

My design for an children’s participatory exhibit titled Spaces & Illusions, which was  installed from 1976–1980, give or take a few months, at Atlanta’s High Museum of Art.

Its appearance here in a blog about a novel way to make world maps may appear incongruous until I offer that the process of designing and installing the exhibit presaged all the constant-scale natural boundary maps you find here.

Presaged in a cluelessly groping way, I admit, but some things take time to resolve themselves.

This image copyright Chuck Clark 2012, all rights reserved.Spaces & Illusions_ChuckClark

Enceladus Foldable Globe

January 18, 2015

Hey, if you’re visiting from papermodelers, leave a note in the comments. I’m  curious to hear what uses you put this model to! Thanks, Chuck


Map in Progress: Earth w/Uninterrupted Oceanographics

August 1, 2014

Sure would be nice to have a simple cylindrical version of David Sandwell’s Satellite Geodesy “global” topography map, over at the Scripps Institute of Oceanography.

Say 7200×3600 pixels? Or, even better, 10,800×5400 pixels. David? David, are you out there, can you hear me?

Below I had to cobble in the poles from another source, so both the color match and data match are off.

Map in progress, with currents from multiple sources, Creative Commons copyright Chuck Clark 2014:


Oh, by the way . . .

February 4, 2010

Under the Pages menu (on the right), a new cut’n’fold map of the asteroid Itokawa sneaks onto the blog.

Also (March edit), the beginnings of a cartographic exploration of Enceladus geology.

And (April edits) a poster recently presented at the Association of American Geographers annual meeting, as well as the start of a meteorological animation.

Further (Feb 2011 edit) a Ganymede foldable geology globe.

July 2012: Yo Brazil! Welcome to the site, grateful for the attention. Call me — we’ll do a special map for your 2016 Olympics.

January 2013: A new page! — Water Molecule. Scroll the menu on the right.