davidjamesweir’s Twitter Archive—№ 3,274

davecl42 Here you go, 2017 average values: kartta.hsy.fi/?zoomLevel=4&coord=25496029_6675527&mapLayers=464+100+,291+100+Typpidioksidin_vuosikeskiarvot&uuid=508752a1-2d1e-4011-a0f7-a96e857fff64&showIntro=false (sorry it's in Finnish, you can load the key from 'karttaselitteet'; the different symbol shapes represent different types of station: passive, fixed and mobile)