Limitations of the 2-D Horoscope

While looking at the current zodiacal position at Sirius using Astrolog, I was surprised to find that it was conjunct Canopus. These two brightest stars in the night sky are quite separate and yet they appear together in the two dimensional wheel generated by the astrology program. The reason of course is that the celestial longitudes of the two stars are being considered and their celestial latitudes, while being displayed by the program, cannot be represented on the chart. Here is the situation as displayed by Astrolog:

The information on the right shows that Canopus has a latitude of -75˚49' and Sirius has a latitude of -39˚36'. However, the view using Stellarium drives home how far apart the two stars really are (the red line represents the ecliptic, the blue line represents the celestial equator):

A planet, moving as it does close to ecliptic, will reach the same longitude as Canopus at some point in time and the two will then be deemed to be conjunct. This seems silly. I think such stars as Sirius and Canopus, because of their large latitudes, should not be included in an astrological chart and of course for the most part they aren't. The stars of the zodiacal constellations however, are a different matter. I covered the astrological significance of the big four (Regulus, Fomalhaut, Antares and Aldebaran) in an earlier post on the fixed stars.

I'm wondering if there is an effective way of representing latitude on an astrological chart. I've made an initial attempt of such a chart. It's just a crude beginning, but a beginning nonetheless. It shows a conjunction of Jupiter and Saturn with the dot positions giving a rough idea of the latitude separation of the two planets. Saturn is about 2 degrees north latitude and Jupiter is about 3 degrees south latitude. It also shows two stars that are conjunct in terms of longitude (like Canopus and Sirius) but quite separate in terms of latitude. The length of the line should give some indication of the magnitude of the latitude but a linear scale wouldn't work. Something logarithmic would work better. Perhaps an inner and outer dotted circle at the same distance from the green and blue circles but representing 25 degrees.