Calculate a complete natal chart (birth chart) based on date, time, and location. Returns detailed astrological information including: planetary positions in zodiac signs and houses with exact degrees, all 12 houses with their cusps, chart angles (Ascendant/Rising, Midheaven, Descendant, Imum Coeli), and major aspects between planets with orbs. Supports multiple house systems.

Convert a location string (city, country) to geographic coordinates (latitude, longitude) using OpenStreetMap geocoding. Useful for obtaining coordinates before calculating a natal chart when only the city name is known.