Set Zoom

To open the map at a specific zoom level simply include the required level (in meters, floating point) in the url in the following format:
http://<your-map-url>?zoom=<zoom-level>

Example

See how the map for Toronto Pearson opens zoomed in upon load when clicking the url:
https://maps.torontopearson.com?zoom=17

The map will appear similar to the following image: