This is a 3D map showing hills and dales. It was produced by finding the x, y, z, co‑ordinates of the heights, on a 20x20 grid, from a standard contour map. These were then fed into a computer, which drew this map as a floating grid.
The process is very expensive as it is so time consuming.
However, there may be a cheaper way by using a digital plotter.
- Turn a standard contour map at 45°.
- Trace round the highest contour lines with a digital plotter or on tracing paper.
This is an arm with a cross‑hair cursor. The position of the cross‑hair appears on a computer screen.
- Reduce the vertical height compared to the width.
- Move the cursor arm down the board or move the map up.
Perhaps a programme could move the contour down.
- Trace the next contour lines.
These will appear lower down on the screen and begin to give a 3D effect.
Try not to go inside the top contour. Delete if necessary.
- Repeat 4 and 5 as often as desired.
- If necessary, make a good master copy from the computer print‑out, for all future photocopying.