what is hectoPascAltimeter

Question

what is hectoPascAltimeter, is it air pressure in mbars?

check http://ws.geonames.org/findNearByWeatherXML?lat=43&lng=-2

Answer 1

A Pascal as the SI pressure measurement: http://en.wikipedia.org/wiki/Pascal_(unit)

"In everyday life, the pascal is perhaps best known from meteorological barometric pressure reports, where it occurs in the form of hectopascals (1 hPa ≡ 100 Pa"

Answer 2

It's a QNH in hectopascals... so it's related to the barometric pressure, but not quite what you want; it's the altimeter setting to get an airplane's altimeter reading the actual height of the runway. Not useful for much other than aviation, because there are safety related corrections in there that are hard to reverse.