John Antkowiak <[email protected]> writes: > When I measure the distance in QGIS, I'm given the choice to use the > Ellipsoidal method or the Cartesian method, which yield different > distances. Which one of those two choices is my wooden ruler using?
For a state plane coordinate system, I would expect the distances from the two methods to be quite close. As a wild guess without really looking it up, within 0.5%. That's part of the point of how SPCs are designed. Presumably the "Project CRS" is the state plane one, and thus the scale relates distances in that (projected, sometimes called Cartesian) CRS to distances on the paper. To have matching maps, you should have both of them produced with the same project CRS. (I have no idea if qgis will allow a map view CRS that is different from project CRS but even if so my advice would be not to go there because you are already in over your head.)
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