From the course: Advanced iOS App Development: MapKit & Core Location
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Coordinate system - iOS Tutorial
From the course: Advanced iOS App Development: MapKit & Core Location
Coordinate system
- [Instructor] Since it might have been a while since you've studied maps, let's review map coordinates since this is a critical skill in using map kit and core location. Coordinates break the world into a grid. An example grid is city streets. Coordinates start with an origin point. We measure coordinates relative to the origin points on some kind of grid. I've use Chicago for an example because there is a geographical origin point at the intersection of State and Madison. The center of that intersection is the address zero comma zero. We use the distance north and south, and the distance east and west from that origin point to get a new map coordinate. North here is an increase along the y-axis. East is a positive increase along the x-axis. South and west are decreases along the y and x-axes respectively. Chicago addresses use 100 addresses per standard block. While those blocks maybe cut up by smaller streets and alleys, you can figure out where any address is as a coordinate. For…
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