A web mapping site at UCL based on Mapserver that serves global full-resolution datasets - SRTM 90m DEM data and Landsat mosaics amongst others. This server also cascade a series of useful datasets from other services (e.g. OnEarth). Our site is Javascript enhanced (the client is based on Ionic's "GAF" interface but we've taken it a lot further) and includes functions such as layer flickering, partial opacity of layers, etc.