UVW 1x1 landscape ?

I’m working on generating a landscape using a high-resolution heightmap, and I’ve got a corresponding color image map that aligns with the landscape features—rivers, trees, and mountains in their respective places. However, I’m encountering an issue when trying to create a material with the map to match the terrain; it keeps tiling thousands of times. In traditional 3D software, I’d simply use a UVW map set to planar 1x1 to fix this, but I’m struggling to achieve the same result without going through lengthy and complex steps. Is there a straightforward node or method to resolve this? Any tips?