ENH : z kwarg in pixel_to_map3d(), get_azeq_projection()
ENH : z kwarg in pixel_to_map3d(), get_azeq_projection()

--HG--
branch : /feature/eg/clutter/cloudtype

kmuehlbauer/wradlib,wradlib/wradlib,heistermann/wradlib,wradlib/wradlib,kmuehlbauer/wradlib,heistermann/wradlib