I have a web map with a focus in the Pacific. However, I can't get the web map extent to show data properly because it cuts off at 180 degrees. Many of my locations are in New Zealand, which is hardly viewable at the global extent because it gets cut off. Is there any way to customize the extent so that it crosses the 180 degree line and shows the whole Pacific Ocean?
When you save a web map with the extent focused on the Pacific Ocean, it will reload to that same extent the next time it's opened: Save maps—ArcGIS Online Help | Documentation
For example, this is what my web map currently looks like when I load it:
Hope this helps,