Grid Creation - Distance between grid lines

[JacobAalfs]

I want to sketch a line exactly 400 feet long as a reference. I turn on the grid in the sketch tool and set the grid cells between major lines to 10. When I sketch a line from one grid to the next the distance is slightly more than a multiple of 10. What is going on here?

[ChrisUnderwood]

Hello @JacobAalfs , could this be explained by the difference between Geodesic and Planar distances ?

https://pro.arcgis.com/en/pro-app/latest/tool-reference/spatial-analyst/geodesic-versus-planar-dista...

[JacobAalfs]

Yes, I suppose it could be. I solved the issue by using the tab button which allows the user to set the line length. Still, this issue is something to think about. When I set the grid lines to up in the settings, what exactly am I setting???