what is hectoPascAltimeter, is it air pressure in mbars?
check http://ws.geonames.org/findNearByWeatherXML?lat=43&lng=-2
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"