[Landscape] Importing heightmap precisely ? (including screen shot)

[matan19]

I have 2 landscapes inside UE4, each with the size of 1009x1009
I also have a heightmap texture (16 bit grayscale png) in size of 2018x1009

I then opened the heightmap in GIMP, cut it in 2 exactly at 50%, and saved each part to a file.
I then imported the files each to a landscape - but some vertices have height differences!

I’m not sure where even the problem is;
Is it UE4? If so, how do I fix it?
is it the .png file format? If so, what are my alternatives?

[Sly401]

Either
Enable worrld composition import the two tiles,
set landscape smoothing brush to power zero and run over edges

Or
Do not split your heightmap and use a 2017 x 1009 terrain on import of the heightmap

Paul G