How We Calculate Astrocartography
This page explains how Astrocartography AI turns birth data into an astrocartography chart and map. It covers the inputs we use, how locations are resolved, how planetary lines are calculated, how the map is rendered, and where the practical limits of the system begin.
What data the calculator uses
The core calculator uses birth date, birth time, birth location, and timezone to generate an astrocartography result. When latitude and longitude are already available, those coordinates can be used directly. When they are not, the system resolves the place name into coordinates before running the chart calculation.
How birth locations are resolved
If a user enters a place name instead of coordinates, Astrocartography AI resolves that location through OpenStreetMap Nominatim. This step is used to turn a human-readable birthplace into the latitude and longitude needed for chart calculation. If accurate coordinates are already present, that lookup step can be skipped.
How planetary lines are calculated
Planetary positions are calculated on the server with the local chart engine. The system uses Swiss Ephemeris files when they are available and falls back to Moshier mode when they are not. This means the chart is generated from the site’s own calculation stack rather than being embedded from a third-party astrocartography widget.
How the map is rendered
The interactive map is rendered with Leaflet and uses OpenStreetMap and CARTO map tiles. This map layer is the visual surface for inspecting planetary lines, comparing regions, and understanding how the calculated chart is distributed across locations.
Limits and practical boundaries
Astrocartography results depend on the quality of the birth data used to generate them. Birth time uncertainty can materially change the output. Place resolution quality also matters when users enter ambiguous locations. The tool is designed for interpretation support and city comparison, not certainty or deterministic life predictions.
- Birth time accuracy matters.
- Ambiguous place names can affect coordinate resolution.
- Astrocartography is best used alongside practical factors such as visas, safety, cost of living, work conditions, family context, and health needs.
- This site is not medical, legal, or financial advice.
Where to go next
If you want to use the full product directly, start from the homepage. If you want the dedicated calculator surface, use the astrocartography calculator page. If you want to see what a typical result looks like before reading a live chart, use the chart example page.