This map viewer page is displaying a Leaflet map using Open Street Map tiles as a basemap. It also is able to load a WMS layer from a HydroShare Geoserver WMS service if the paramters "resourceid" and "layername" are specified from a valid HydroShare resource.
To test this page, include the following paramters in the URL query string in your browser and set a value for each one: 'user', 'resoruceid', and 'layername'
For example here is a full URL with the query string added: