That’s a good question about the Davison chart! I wonder, too. 

I’ve done my husband’s and my composite chart. Maybe I will do a Davison to see the difference.

I will try to answer your questions based on my experience, but would be curious to read the opinions of astrologers.

How is Davison different from composites in measuring transits?

A Davison chart is no different to a natal chart except it is based on the midpoint of the birth dates and place - i.e. midpoints of the latitudes and longitudes of both person's birth date/place. While a Composite is made up of midpoints of the various planets - i.e. in simplicity (Sun Sign Person A + Sun Sign Person B) /2 = Composite Sun Sign. I think whether a person uses Davison or Composite, it is more a matter of personal preference. I do believe that both can provide a different view point to the relationship.

https://elsaelsa.com/astrology/davison-vs-composite-charts/

What exactly does the first meeting chart represent? 

A 1st Meeting Chart is no different to a natal chart except it is the "true birth" of the relationship based on the date, time and exact place two people meet or communicate on an emotional one on one basis (not when you swipe left or is it right in internet dating apps, but when both people energetically invest in one on one communication - note I said BOTH).

Davison and Composite are always there, while a 1st Meeting can only exist once two people meet and begin relating one on one.

Therefore, a 1st Meeting Chart is not just a transit to natal/synastry/composite on that particular date, it is a chart of it's own, with it's own date, time and place of birth.

How would you rate the usefulness of first meeting charts as a prognostic tool? And compare it to Progressed (natal and composite) or Solar Arc?

It all comes down to preference. I personally cannot stand Solar Arcs - never use them. There are others who feel the same way about progressions. Whereas, I love progressions, and I can progress a 1st Meeting Chart and create its Solar, Venus, Mars, Jupiter Returns. So to me a 1st Meeting trumps both Davison and Composites - while the latter are useful, they are less dynamic. In my own relationship, our 1st Meeting Chart has proved to be consistently more accurate and precise as a prognostic tool.

e.g. 1st Meeting Solar Return '19 had Sun in 10th house and IC/MC at 0°. This is the year we began working on a "work/career related" project together. The project started in the 1st Meeting Lunar Return Chart that had a Full Moon. Also, around this time our 1st Meeting p.Moon changed signs. Both Davison and Composite say we can have a career together, but they don't provide specificity like the 1st Meeting.

https://elsaelsa.com/forum/astrology/first-meeting-charts-the-relationship-us/

Many thanks! This is so useful that i am copying it for future reference!

Quick followup q though. You mentioned first meeting chart as when people begin to relate to each other. Does that mean its when they  agree to be in a relationship? For example, if two people meet casually at a party, later start dating and eventually marry. Does the date and time when they first set eyes on each other become their first meeting chart data? What are your thoughts on initial phone or email communication between people who would turn out to be very significant to each other later?

I coupled up before Tinder became a thing, but I understand what you mean by not counting the time when you first saw their shirtless profile picture next to a giant fish! ?

Thank you! 

I have one more question. Which birth location would you use for a composite or Davison chart? My initial thought was to use the location that you live in at the time of the relationship. But I could be mistaken ?

What is interesting is that in my husband’s and my composite chart, we have an Aries sun at 28°. In the Davison it is 0 Taurus. Interesting. I feel that we are more Arian.

Does that mean its when they agree to be in a relationship? For example, if two people meet casually at a party, later start dating and eventually marry. Does the date and time when they first set eyes on each other become their first meeting chart data? What are your thoughts on initial phone or email communication between people who would turn out to be very significant to each other later?

I don't think there's a formula to this. It depends on the individuals. Simply put, if there was a connection, romantic interest, chemistry then yes in the example you gave. So the date/time becomes that moment.

But if it's so casual that they barely spoke, or remember each other, then it would be the next meeting that would be more relevant.

On phone calls and emails, it depends on the content of the conversation and whether there's romantic interest - both persons.

Which birth location would you use for a composite or Davison chart?

I use the reference place, being the place where the relationship is taking place. Intuitively this makes more sense to me, rather than some arbitrary shortest distance of an average latitude and longitude that could land up being in the ocean if two people are from different hemispheres, continents etc. If you're born in the same country/region then it might not be as much of an issue.

Thank you!