3

I need to make some small world globes on balls, 55 mm in diameter, to illustrate and give away at a talk on map making. I have written a computer program that draws the gores to fit the ball (any size ball), but I need a source of suitable coordinate data to draw coastal outlines on it. All the data sets I have so far found have far too many points, much too detailed, very nice for larger scale regional maps but not suitable for my purpose. Please is there a source of data that I can use? I expect to need somewhere between a hundred and a thousand points to plot.

A way of reducing one of the large data sets to a more acceptable scale might be possible but looks to be a very difficult operation to do effectively.

3

In the link below you can download shorelines and other information in several formats and resolutions:

https://www.soest.hawaii.edu/pwessel/gshhg/

The crude resolution is quite low resolution and maybe fits your needs.

  • Thank you kikocorreoso, that does look like just what I need. I'm having a bit of trouble installing GMT but I am sure that when I get that sorted out I will have the information I want. – Harry Weston Jan 9 '17 at 22:45
1

In the end all the data resources I could access in Shape file format were much too high a resolution -- just too many points.

However I have found just the data I need accompanying the gnuplot programming language on Linux as world.dat with 1320 coordinates. Plotting the data with gnuplot gives this map: map

If you have a system with gnuplot installed you should find it there -- I don't know how to access it otherwise.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.