uwacan.positional.SensorArrayPositions.local_length_scale

SensorArrayPositions.local_length_scale()

How many nautical miles one longitude minute is.

This gives the apparent length scale for the x-axis in mercator projections, i.e., cos(latitude). The scaleratio for an x-axis should be set to this value, if equal length x- and y-axes are desired, e.g.:

xaxis=dict(
    title_text='Longitude',
    constrain='domain',
    scaleanchor='y',
    scaleratio=pos.local_length_scale(),
),
yaxis=dict(
    title_text='Latitude',
    constrain='domain',
),