The number of tiles is how many tiles the world will be composed of. Normally, the bigger the world the higher a number of tiles you want in order to keep the vert spacing on the lower side. Higher vert spacing values (1.2+) cause the non-moving Geralt issue I've found.
LOD config, all vanilla maps use 1024 clip window with 512 tile resolution, I don't think any use 1024 and 1024
Edge length in meters is the complete length of the world, width and length. A value of 14000 for example would mean your world will be 14km x 14km. This is the value that directly controls how big the world will be, not the number of tiles
Minimum and maximum elevation is the overall height of the terrain, from the lowest point to the highest in meters. A difference of 2625 like in the image means the overall height of the terrain (from top to bottom) is 2.625km. I'm not entirely sure what the values are in relation to, but I think it may be some sort of default ocean level. Needs investigating further.
When importing tiled terrains, the number of tiles and LOD config are determined by the pngs being imported. The rest of the values are taken into consideration, and should be chosen before importing the terrain.
Image 1 is the settings used, image 2 is the imported terrain in the editor and image 3 is the scale compared to Geralt.
The golden rule to avoid the floating/non-moving Geralt issue: keep the vert spacing under 1 meter, either by increasing the tile resolution, the number of tiles (both not possible without distorting already-imported terrain) or lowering the edge length.
For a custom world that's DLC sized (like B&W), the edge length is roughly about 8k meters, tile resolution is 512 and the amout of tiles is 32 x 32. This is by far big enough for any starting custom world.
If you were to have a huge edge length like 30k, then you would have to increase the tiles to the maximum amount, and/or move up to 1024 tile resolution. As long as you get under 1 meter vert spacing, you shouldn't get stuck in one spot when moving around.
post some images 😀