| Wed Feb 14 17:59:09 2018 by Pedant |
| Just a query about the contour lines on the online generator–what elevation are they supposed to represent? Only it's a little unclear, and it could be important in working out the local climate... |
| Thu Feb 15 09:54:51 2018 by Torben |
| Each contour line represents 5, 10 or 20 steps in the colour scale, so the distance in meters depends on the colour map. Furthermore, the vertical scale on the maps is rather abstract, so even with a fixed colour map, you must apply your own conversion to meters. |
| Fri Feb 16 12:21:07 2018 by Pedant |
| Hmm...any suggestions? I'm somewhat new to this... |
| Mon Feb 19 10:05:51 2018 by Torben |
| Different colour maps have different numbers of colours, so a conversion to meters will require knowing the number of colours. The Olsson colour map has 25 colour steps between sea level and the snow line. At the equator, the snow line is approximately 4500 meters above sea level, so one colour step is roughly 4500/25 = 180 meters. So using five colour steps per contour line will make them roughly 900 meters apart. The Burrows colour map has 111 steps between sea level and the snow line, so there is roughly 40 meters between each step, so five steps per contour line gives 200 meters per contour line. Note that the different colour maps are not consistent about at what height value the snow line is, so you will see snow line move as you change the colour map. |
| Thu Mar 1 14:47:56 2018 by Pedant |
| That's...actually really helpful! Thank you! How about for Lefebvre? |
| Thu Mar 1 17:35:12 2018 by Torben |
| Lefevbre has 145 steps between sea level and snow line. |
| Sat Mar 3 19:42:15 2018 by Pedant |
| Many thanks again! |
| Fri May 18 21:07:57 2018 by Pedant |
| Um...hello! Me again! The one thing that still doesn't quite make sense is whether or not one should simply assume that all steps above 620 metres (the exact number on a Lefevbre map at 20 steps per contour) are mountainous–which would mean in effect that most of the landmass is unusable land...might I trouble you one more time to clarify? Sorry again... |
| Sat May 19 01:03:27 2018 by Pedant |
| Um...hello! Me again! The one thing that still doesn't quite make sense is whether or not one should simply assume that all steps above 620 metres (the exact number on a Lefevbre map at 20 steps per contour) are mountainous–which would mean in effect that most of the landmass is unusable land...might I trouble you one more time to clarify? Sorry again... |