Data Sources

K-Astrology Lab uses local city data to support birth-place autocomplete and true solar time calculation. Runtime autocomplete is served from our own backend and does not call public geocoding APIs.

GeoNames

City autocomplete data includes data from GeoNames, licensed under the Creative Commons Attribution 4.0 License.

U.S. Census Bureau

U.S. place-name enrichment may use public Gazetteer reference files from the U.S. Census Bureau. K-Astrology Lab is not endorsed by the U.S. Census Bureau.

Geolonia Japanese Addresses

Japan address autocomplete includes data from Geolonia Japanese Addresses, licensed under the Creative Commons Attribution 4.0 License. This dataset is based on Japanese open address data, including national land location reference information and Japan Post address data.

Manual Aliases

Some common local spellings and informal place names, such as neighborhood or shorthand names, are maintained by K-Astrology Lab to make city search easier. These aliases are mapped to the closest supported place record for calculation.