WMS (Web Map Service) is a standard protocol for serving (over the Internet) georeferenced map images which a map server generates using data from a GIS database. The Open Geospatial Consortium developed the specification and first published it in 1999.
WMS is a great way to give more context to your geospatial analysis in Spotfire. It is supported since Spotfire 6.5.
- OGC Web Services: http://mesonet.agron.iastate.edu/ogc/
- FWS Fish and Wildflife service: https://www.fws.gov/wetlands/data/web-map-services.html
- USGS National Map: https://www.usgs.gov/products/maps/gis-data
- GEBCO Chart of the oceans: http://www.gebco.net/data_and_products/gebco_web_services/web_map_service/
- NORA Coast Survey: http://www.nauticalcharts.noaa.gov/csdl/seamlessraster.html
- NOAA Weather Service: http://www.nws.noaa.gov/gis/services.html
- FEMA Flood Hazard: https://hazards.fema.gov/femaportal/wps/portal/NFHLWMS
- USDA Drought Monitor: http://droughtmonitor.unl.edu/MapsAndData/GISData.aspx
- Inspire Geoportal is a search engine for map services for European countries: http://inspire-geoportal.ec.europa.eu/discovery/
- Spatineo is a seach engine for map services worldwide: http://directory.spatineo.com
There are many many more to find on the web. One easy way to find publicly available WMS is by searching Google with the following query: "Your data search" "Supported Interfaces:" wms
Example: "View footprint in:" "Supported Interfaces:" wms