From: The conceptual schema in geospatial data standard design with application to GroundWaterML2
GWML2 Feature Type
OGC Service
Provider
URL
GW_Well
GW_Aquifer
GW_AquiferSystem
GW_ConfiningBed
GW_MonitoringSite
WMS
GSC
USGS
http://gin.gw-info.net/service/gin/wms/mediator/gin_en?service=WMS&version=1.1.0&request=GetCapabilities
http://cida.usgs.gov/ngwmn-geoserver/ows?service=wms&version=1.3.0&request=GetCapabilities
GW_Discharge
GW_FluidBody
GW_ManagementArea
GW_Recharge
GW_Spring
Borehole
WFS
BOM/CSIRO
BRGM
FedUni
GNS/Z_GIS
http://gin.gw-info.net/GinService/wfs/gwie?REQUEST=GetCapabilities&ACCEPTVERSIONS=2.0.0&SERVICE=WFS
http://gwservices.it.csiro.au:8080/geoserver/ows?service=wfs&version=1.1.0&request=GetCapabilities
http://geoserverref.brgm-rec.fr/geoserver/ows?service=wfs&version=2.0.0&request=GetCapabilities
http://cida.usgs.gov/ngwmn_cache/wfs?version=1.1.0&service=wfs&REQUEST=GetCapabilities
http://data.vvg.org.au:8080/geoserver/wfs?version=1.1.0&request=GetCapabilities
http://portal.smart-project.info/gs-smart/wfs?request=GetCapabilities&service=WFS(deprecated)
WML2::TimeSeries
SOS
GNS / Z_GIS
http://gin.gw-info.net/GinService/sos/gw?REQUEST=GetCapabilities&ACCEPTVERSIONS=2.0.0,1.0.0&SERVICE=SOS
http://ressource.brgm-rec.fr/service/sosRawPiezo/service=SOS&version=2.0.0&request=GetCapabilities
http://cida.usgs.gov/ngwmn_cache/sos?request=GetCapabilities&service=SOS&AcceptVersions=2.0.0
http://portal.smart-project.info/sos-smart/service/kvp?request=GetCapabilities&service=SOS
Same as WFS and SOS above
WPS
http://portal.smart-project.info/wps/WebProcessingService?Request=GetCapabilities&Service=WPS(deprecated)