Only water after loading DEM file

[younha7316 0]

Hi, I'm trying to make a map of South Korea. I got DEM files and converted into a BMP 8-bit image. (1025X1025)

After C+S+A+R, the image was loaded successfully and I waited for 15 minutes, but unfortunately, after that, there was only a largeeeeeeeee ocean! Any land was created!

I did everything that I can do but I could not get the map.

What was the problem? Can anyone help me?

I'll upload the BMP file I used below.

 

[RipRap 4,400]

You need either SC4Mapper or SC4Terraformer to load the greyscale image first, save it as a new region and then load it on SC4.

[cogeo 960]

You said you are using a 8-bit BMP file. So:

- First make sure that the palette corresponds to the RGB (well, gray) values exactly, eg palette index 90 should represent the (90,90,90) color.

- Second, make sure that your color->height mappngs is correct. With the default settings, a value of 83 represents water, while 84 land. And this because Image Scale Factor is set to 3.0 and Sea Level to 250m, so 83x3.0=249, while 84x3.0=252.

- Third, check whether you have any "Height Mod" plugin installed (these typically modify the Image Scale Factor, while Sea Level usually remains at 250m - this changes the Water/Land threshold as well, because if the Factor was set to 4.0 for example, the threshold would be 250/4.0=62.5, ie 62 would be water and 63 land.

 

But as Tonraq suggested, consider using SC4TF/SC4M instead. Using images for representing and importing your maps not only has limitations (eg max height is 255*3.0=765m only), it also causes the dreaded "steps" effect, as the format can has only 255 distinct height values, multiples of 3.0m (or the scale factor you have chosen).