MDR Export from FT3
jbclaypool
Newcomer
I'm trying to export a special MDR file from FT3 to Wilbur, but all i get is a flat continent in Wilbur. When I look at map info in Wilbur it says that the max elevation is 1109135.375 and the min elevation is -1537119671549952. I'm trying to follow the Israh tutorial. Currently using Wilbur 1.89 and FT3 3.021. I've tried special MDR, 16 bit special MDR, regular MDR, png grey scale. Nothing gives any terrain variation on the map. MDR exports from FT3 I did last year open up with terrain variation in Wilbur, just nothing currently.
Comments
Alternatively, you might have one or more values that are out of scale with the rest of the surface. In Wilbur, use Window>>Histogram to see the surface distribution. If you see a thin line right around value 0, then one or more of the data values are damaged. Use Filter>>Height Clip with a reasonable Min and Max values (min=-10000 and max=10000 are a good place to start). If you start to see something useful, use Window>>Histogram again to determine the live parts of your data (the parts that look like a mound in the middle of the histogram) and apply height clip again to get things roughly in range.
I have tried the advice above and nothing seems to help. I tried hunting through numbers in the Histogram to see if I could nail it down but only managed to move the thin blue line to one side or the other.
Screenshot attached, and here's a google drive link to my .FTW file if that helps. (The file was too big to attach here)
https://drive.google.com/file/d/1vtry-cXKMfBrlRh0aKY_ERgJe7fcLtcL/view?usp=sharing
If, however, your world is already the victim of a Burn In To Surface operation (that is, altitudes reside wholly in the offset channel), then you can use the Global Math Tool (Tools>>Global Math Tool) to do the equivalent of a height clip directly in FT3. One thing to watch out for is that the tool operates in the native altitude units (meters) rather than the selected altitude units (which might be feet). To clip your world to between -9144 and +9144 meters (+/- 30000 feet), try this:
a) Tools>>Actions>>Normalize Data to get rid of any obviously bad data (just in case).
b) Tools>>Global Math Tool to bring up the Math Tools dialog. Select Destination as Offset, Source 1 as Offset, Operation as Minimum, Source 2 as Constant, and Constant Value as 9144. Then click OK. This operation clips the highest point in the world to 9144 meters (every pixel is picked as the lower of its current value or 9144).
c) Tools>>Global Math Tool to bring up the Math Tools dialog again. Change Operation to Maximum and Constant Value to -9144. Then click OK. This operation clips the lowest point in the world to -9144 meters (every pixel is picked as the higher of its current value or -9144).