I would like to produce a map of "points near a feature" in Tableau. For example, I would like to plot "rapid transit stops within 2 miles of the charles river". I know how to do this using something like QGIS; I'm trying to figure out if this is even possible with Tableau.
The first step, ignoring the "near a feature" aspect, is simply to get the two sets of data to display on the same map at the same time, and I've been unable to make that happen. A major stumbling point for me is that Tableau appears to want to join all the data sources, but there is no clear join column in the absence of GIS functions like
st_distance or something similar.
The examples I've seen so far (e.g., this one) for what Tableau calls "dual axis maps" seem to be either trivial (just a couple of rows of data) or to involve data that is tightly linked and has an obvious join column.
Am I chasing after the impossible here?