Unity Import PNG Heightmap

I am new to unity and I wanted to import an existing height map I found on the web to give me some base terrain to practice on but I cannot get it to work. I have tried everything I can think of and I am at a complete loss. I've tried saving the file as a bmp and jpeg as well with no luck.

Below is the image I am trying to use (2048x2048):
http://www.xtr1m.com/temp/heightmap.png

Under resolution my terrain width and height are both the default 2000. When I choose "import raw" I am setting it to the following:

depth: bit16
width: 513 (I have tried 2049 and 1025)
height: 513 (I have tried 2049 and 1025)
byte order: windows

Since the image is 2048x2048, am I using the wrong import height/width? I read online that the height/width needs to be divisible by 2 and you need to +1 to it.

Does anyone happen to know what I am doing wrong?

Thanks in advance, any advice would be greatly appreciated!

 

No, it needs to be power of two plus one.

It can only be in raw format.

--Eric

 

Thank you Eric for clearing all that up for me! I really appreciate it!!