The Manhattan Grid extended to every point on Earth

I don't think the grid is completely correct in Manhattan, even where the grid exists. It puts Washington Square Park , which southern end should be 4th street, as 6th street, and on the northern end of the grid, George Washington Bridge, which comes into Manhattan at 175th (I believe), is marked at 180/181st.

This is a really cool map, but some minor adjustments and testing to get the correct fit in Manhattan first would make a notable improvement in the overall product. I'd say fitting goals would be Houston as 1st street, and maybe 191st-200s area for north bound (Bronx continues the pattern, but it's much less consistent). Good work!