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.