Astrocartography, also called Astrogeography is one of several methods of Locational Astrology, which purports to identify varying life conditions through differences in location. 
Developed and popularized by American astrologer Jim Lewis (1941-1995),who trademarked the term “Astro*Carto*Graphy” to refer to his map, astrocartography is a locational astrology system that focuses on elements of the relocated natal chart, with these factors indicated on a world map.  
Lewis’ AstroCartoGraphy maps show all locations on the earth where planets were “Angular” (rising, setting, upper transit, lower transit) at the moment of a person’s birth. An “angular” planet is basically one sitting in a conjunction with the starting house cusps of the 1st, 4th, 7th, and 10th houses, called the “angular houses.”

With astrocartography, lines drawn on a world map show where these factors occur for an individual through relocation. According to Astro*Carto*Graphy theory, if the person were born at any of these locations, the corresponding planet would be said to be prominent and influential in the chart.

Jim Lewis took this basic astrological idea one step further by postulating that if a person later travels or visits such an angular location, the planet would have a similar prominent role in the person’s experience of that location. These maps are widely used to plan for relocation or travel.

They are part of a general branch of astrology known as “relocation astrology“.

Other techniques used for this purpose include local space mapping, relocated birth charts, and city incorporation charts. Mr. Lee, who wrote “The Geostel Brownbook” as an elaboration and addendum to the original Lewis writings, holds that the Lewis “Astro*Carto*Graphy” map only scratched at the surface of the reality of locational astrology, and that any map approach is flawed as a method for understanding locational influences.

Lee asserts that in noticing phenomena related to relocated angular conjunctions, Lewis had only stumbled onto the functionality of the “relocated natal chart.” A Relocated Natal Chart is a chart using the same real birth moment, but drawn for a different location.

Lee claims that the Lewis ACG map is simply an incomplete derivation of the relocated natal chart, and that accuracy and detail is found by working with actual Relocated Natal Chart as a whole.

Lee goes farther than Lewiis, stating that an individual receives the entire Relocated Natal Chart upon moving, including a new “Rising Sign,” financial houses, etc. — and not just “angular conjuctions.”

Lee also states that the new “Relocated Natal Chart” after a relocation becomes one’s primary astrological chart, not just a “secondary” influence as is commonly held. Lee is the first astrologer to hold that this “relocated natal chart” has primacy over the natal,” and the first to hold that accurate locational analysis requires the study of the whole Relocated Natal.