# Get relative north aligned point 2163 (US Equal Area)

What I'm trying to do is create a grid where the y axis is north aligned. I have a origin Lat/Lon point which is the bottom left corner of the grid and each cell should be 100 by 100 meters. So I projected my points to SRID 2163 (US Equal Area) and figured id use each the grid x,y values with the cell size relative to my origin point.

like this:

``````cell_bottom_left = { lon: origin.lon + (100 * x), lat: origin.lat + (100 * y)}
cell_top_left    = { lon: origin.lon + (100 * x), lat: origin.lat + (100 * y) + 100}
cell_bottom_right= { lon: origin.lon + (100 * x) + 100, lat: origin.lat + (100 * y)}
cell_top_right   = { lon: origin.lon + (100 * x) + 100, lat: origin.lat + (100 * y) + 100}
``````

it worked fine, except the grid was tilted. I then found out that 2163 is not north aligned which explains what is happening here.

How would I go about creating a north aligned grid?

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It would seem that your grid is north-aligned. It just isn't orthogonal on the screen. Are you asking for a projection that will make your grid both north-aligned and orthogonal? – Patrick Aug 11 '11 at 3:18
Wouldn't that only be achievable by rotating the map? Either way, I guess I just need it to be orthogonal then if I understand correctly. – ilia choly Aug 11 '11 at 3:51
No, not necessarily. If you rotate the grid and leave the coordinate system the same, your top will not be due north of your bottom. – Patrick Aug 11 '11 at 3:55