Have you ever had the need for a tool that is able to obtain an estimated optimal maximum BoundingBox for a given SRID or a list of appropriate SRIDs for a given Lon/Lat coordinate pair? Well, we had — That’s why terrestris built the online service to help in the described circumstances. The service “Projection Utility” has the following functionalities:

1. Obtain an optimal bounding box for a projection (EPSG code)
2. Obtain projections for a given geographic position (longitude/latitude)

The implementation is in PHP and the interfaces JSON und JSONP are offered. Examples: The service is available at http://www.webmapcenter.de/projection-utility and can be configured with URL parameters. Example 1 – Open the manual http://www.webmapcenter.de/projection-utility/index.php?mode=manpage Example 2 – Request a bounding box for the coordinate system EPSG:31467 http://www.webmapcenter.de/projection-utility/index.php?mode=getbbox&srs_num=31467 Example 3 – Request a list of appropriate coordinate systems for the city of Bonn http://www.webmapcenter.de/projection-utility/index.php?mode=getsrids&lon=7.09699630737305&lat=50.7342624664307 Thanks to http://spatialreference.org for building the base data of the service.