What does Ra mean with the other mind, mass mind and infinite mind?

[Infinite]

but what does he mean with the geometric and geographical relations?

Within the door lies an hierarchical construction you may liken unto geography and in some ways geometry, for the hierarchy is quite regular, bearing inner relationships.

It seems to me that Ra meant that all these portions of the various types of mind are organized / exist in a well structured and hierarchical way. That is, at well-defined levels. These geometrical and geographic relationships seem to me to be some kind of analysis of how the individual mind is linked to these other types of mind. But this is one of the most complex parts of Ra's material. Their terminology is often confusing.