# File lib/jpmobile/datum_conv.rb, line 55 def self.tky2jgd(b,l,he=0) x,y,z = blh2xyz(b,l,he,Bessel) x,y,z = xyz2xyz(x,y,z,Tokyo97toITRF94) b,l,he = xyz2blh(x,y,z,GRS80) return b,l,he end