Skyscript Astrology Forum

The Spanish website of Sylvia de Ayala
https://carta-natal.es/direcciones-primarias.php
(Right-click to Google translate in English or any other languages if you are not Spanish)
And a lot of other calculating tools

Calculating Primary Directions with Topocentric House System and Naibod Key

Definitions as per Matrix Software dictionary

Topocentric House System
One of several house systems.
A 20th-century house system derived by Argentinean astrologers Vendel Polish and Nelson Page. It is topocentric as opposed to geocentric, i.e. the birthplace is kept on the surface of the Earth, rather than being projected to the center of the Earth. It was formulated after laborious empirical testing with primary directions that indicated the positions of the house cusps. Its house cusps are within a degree of Placidian cusps (not including extreme latitudes over 56°), although the two systems have completely different mathematical premises.
The celestial equator is divided into 12 equal parts from a cone of rotation. The resultant ascensional circles are then projected onto the ecliptic to obtain the degrees of longitude of the house cusps.

Naibod Key
A type of solar-arc direction based on the mean diurnal motion of the Sun or Naibod arc (named after its developer, Valentine Naibod) of 59'08" (0.98564733°). The arc of direction (calculated by multiplying the Naibod arc by the age of the individual) is applied equally to all planets in the chart.[/u]

Good find...thanks for sharing...

Nice graphics too

Here's the Topocentric Primary Direction for my wedding.

PD Asc conjunct natal Venus (0° 0' orb)

Yes the graphic is nice.
I find it funny that Google translates Converse Directions by 'You talk'
Anyway, one can find the road.

Question for you Atlantean.
When looking at PDs, do you draw your natal chart in Topocentric?

It's not topocentric positions, but it IS topocentric houses.

Using topocentric houses is the only way to get the primary directions to work, relative to house cusps, with orbs of just a few minutes of arc. (Don't forget that topocentric is the one house system that wasn't invented, but rather discovered. They took well-timed births, looked at the relevant primary directions, then found the formula to put the cusps THERE, where they were found to be...)

Yes obviously Topocentric houses.
Solar Fire list it in the choice of houses.
Planetdance doesn't have it under this name but has the Polich house system. Same thing?
In my natal chart, Topocentric houses fall within 1 degree of the Placidus ones.

On the website, it says 'Regardless of the house system used for the natal chart, the addresses (understanding house cusps) will be calculated based on the Wendel Polich and Nelson Page topocentric system.
In this case, you would look at House cusps to Planets or Planets to House cusps. Have you found any relevant events having to do with House cusps to House cusps?

Appreciate your input Atlantean.

Yes, Polich-Page is the same as Topocentric.

Re: Placidus

Yes, Placidus is normally within a degree or so of the Topocentric positions. (likely the reason Placidus has held on so long, it's almost correct)

Re: "Appreciate your input, Atlantean"

My pleasure.