Terrainmap is lined

Hello, I’m beginner in Unity. My map raw file is lined on Unity terrain what should I do?

First, I set the Heightmap Resolution 513, and import the raw file, which is 513x513 px resolution.

But Terrain seems like this. picture 1. Is there anything wrong in Resolution settings which is in the Spector.

I saw this post, followed the instructions, set the same heightmap resolution and RAW file resolution, saved the RAW file channels In with Non-Interleaved order. But I can’t found the mistake.