[Qgis-user] a reliable wms for demo of the qgis wms layer

[maning sambale]

Any suggestions for a reliable WMS I can use demos?  The NASA JPL wms
is flakey sometimes.  I am preparing some how-to on using wms layers
and also other imageries using the openlayers plugin.

Preferably with a worldwide coverage.
-- 
cheers,
maning
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