The aspect_ratio argument sets the aspect ratio for the plot widget as a whole. I would like to fix the aspect ratio for the glyph in the data coordinate system (so one meter in x is the same length as one meter in y).
@jcarson I’m not sure where you encountered this notion but it is not correct. The aspect_ratio does control the data-space aspect ratio. The way aspect management works in Bokeh is that if auto-ranging is active, then the range start and end (in data space) will be adjusted to conform to the aspect ratio you specify. Note that if you have set the range start/end manually that that takes precedence. Bokeh will assume you know what you want, and will not override it. Otherwise, in order to speculate further we would need a Minimal Reproducible Example to actually run and investigate.