Template:LatLonZoom2JOSMbbox
From OpenStreetMap Wiki
This template transform slippymap parametters (lat, lon, zoom, width, height) into JOSM bbox parameters (left, bottom, right, top). It gives a string ready to use with the Template:JOSM Control
It can be used in a template in adjunction with the slippymap extension.
Examples
left=5.99325&bottom=47.25047&right=5.9954&top=47.25261
-180
