**-A**\ [**m**\|\ **p**\|\ **x**\|\ **y**\|\ **r**\|\ **t**]
    By default, geographic line segments are drawn as great circle arcs by resampling
    coarse input data along such arcs. To disable this sampling and draw them as
    straight lines, use the |-A| flag.  For Cartesian data, points are simply connected.
    To adjust these behaviors, append a directive:

    - **m** - Draw the line by first following a meridian, then a parallel.
    - **p** - Start following a parallel, then a meridian. (This can be practical
      to draw a line along parallels, for example).
    - **r** - For polar projections, draw stair-case curves whose first move is along *r*.
    - **t** - Same, but first move is along *theta*.
    - **x** - For Cartesian data, draw stair-case curves that whose first move is along *x*.
    - **y** - Same, but first move is along *y*.

    **Note**: In :doc:`plot3d`, the |-A| option requires constant *z*-coordinates.
