# new CoordinateSpan(latitudeDelta, longitudeDelta) Creates a new coordinate span object with the specified latitude and longitude deltas. ``` constructor(latitudeDelta?: number, longitudeDelta?: number); ``` ## Parameters `latitudeDelta` The amount of north-to-south distance (in degrees) to display for the map region. Unlike longitudinal distances, which vary based on the latitude, one degree of latitude is always approximately 111 km (69 mi.). `longitudeDelta` The amount of east-to-west distance (in degrees) to display for the map region. The number of kilometers (or miles) that a longitude range spans varies based on the latitude. For example, one degree of longitude spans a distance of approximately 111 km (69 miles mi.) at the equator, approximately 88 km (or 55mi.) at 37º north latitude (the latitude of San Francisco), and shrinks to 0 km (0 mi.) at the poles. ## Discussion The latitude and longitude delta parameters need to be positive numbers. MapKit JS treats negative numbers as zero. ```javascript const span = new mapkit.CoordinateSpan(.016, .016); // The initializer requires parameters in the order of latitude delta, longitude delta. ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)