30.08.2008, 19:01
Righto chaps, I think I've cracked it :o !
Zipzapp: thanks for the adjuster tool; I'll certainly be able to make some of use of it. I can't use it on map_h though, as the height values are in a logarithmic scale. For example, subtracting the equivalent of 74m from everything (RGB 80, 80, 80) will indeed set my base height to 0m, but (for example) 2000m would get dropped to 341 -348m. In other words, a blanket reduction flattens the elevation right out.
What I have done is downloaded a .dbf file editor. The best one is a trial version and doesn't work until you cough up nearly $50 - no thanks - so I've found some older ones that work. It may mean a bit more manual labour but what I can do is set 74m and every height value below it to RGB 0,0,0, then copy the values from 0m and up in Clockwatcher's table to the 74m height and beyond. This should have the effect of lowering my map_c so that 74m on the ground is shown as sea level; it also limits the max. elevation I can get to 1600m, which is more than enough for my map.
I'll let you know how I get on; it's now late and I have to be up in five hours to do a long day's work. Wish me luck!
:cheers:
Zipzapp: thanks for the adjuster tool; I'll certainly be able to make some of use of it. I can't use it on map_h though, as the height values are in a logarithmic scale. For example, subtracting the equivalent of 74m from everything (RGB 80, 80, 80) will indeed set my base height to 0m, but (for example) 2000m would get dropped to 341 -348m. In other words, a blanket reduction flattens the elevation right out.
What I have done is downloaded a .dbf file editor. The best one is a trial version and doesn't work until you cough up nearly $50 - no thanks - so I've found some older ones that work. It may mean a bit more manual labour but what I can do is set 74m and every height value below it to RGB 0,0,0, then copy the values from 0m and up in Clockwatcher's table to the 74m height and beyond. This should have the effect of lowering my map_c so that 74m on the ground is shown as sea level; it also limits the max. elevation I can get to 1600m, which is more than enough for my map.
I'll let you know how I get on; it's now late and I have to be up in five hours to do a long day's work. Wish me luck!
:cheers: