Technical Q&A OPS 25 - Accessing the Geographical Database in Apple’s Map Control Panel (17-May-1999) Q: How can I provide my users with a “hook” to access the geographical database in Apple’s “Map” Control Panel from my application? A: There’s no supported way of accessing the geographical database contained in the “Map” Control Panel. Here are some hints, however (just to satisfy your curiosity): The data are stored in a resource of type 'CTY#', ID=-4064, in the Map cdev. The resource format is a list of word-aligned (variable length) city entries, preceded by an integer indicating the number of entries. Each entry has the format: [Integer] length in bytes of the entry [Longint] latitude in Fract; north = + [Longint] longitude in Fract; east = + [Longint] GMT difference in seconds; east = + [Longint] (reserved; set to 0) [PascalString] name of the city. -- Mark Cookson Worldwide Developer Technical Support Technical Q&As | Contents Previous Question | Next Question To contact us, please use the Contact Us page.