Abstract: NASA HDF-EOS Web GIS Software Suite (NWGISS) is a suite of web GIS software that makes HDF-EOS data available to GIS users based on Open GIS Consortium's (OGC) interoperability protocols. It consists of the following components: a map server (WMS), a coverage server (WCS), a catalog server, a Multi-Protocol Geoinformation Client (MPGC), and a toolbox. Those components can work both independently ... or collaboratively.
NWGISS can work with all three types of HDF-EOS data, namely swath, grid, and point. Currently, the map server, compliant with OGC web mapping specification 1.0, has been developed and tested. The coverage server, which serves real data to GIS clients, has been developed and tested as a part of OGC WMT II activities. The catalog server provides catalog search capabilities to GIS clients. The state-full catalog server has been implemented and the http-based stateless catalog server is being implemented. The Multi-Protocol Geoinformation Client (MPGC) provides an interoperable way of accessing geospatial data, especially those from remote sensing. It is in conformity with OGC's web coverage specification ( version 0.5 & 0.7 ), web feature, web map and web registry specification to communicate with a server to request any subsets of a multi-dimensional and multi-temporal geospatial data for a specific geographic region from the server and overlay map image. It also can reformat the returning data set in user specified data format. And more, it is a robust visualization and analytical tool for geospatial data.
The toolbox consists of two-way translators between HDF-EOS and major GIS formats, as well as the CreateCapabilities tool that automatically creates the XML capabilities descriptions from the metadata in HDF-EOS files. Both tools are available now. NWGISS map and coverage servers have been used by NASA and other space agencies. NWGISS is free to data providers who want to serve HDF-EOS data to GIS clients.