img: Support writing 3d file to an existing FILE*

[survex.git] / tests / cmd_declination_conv.svx

; pos=yes warn=0
; Adapted from example posted by Mateusz Golicz to the mailing list
*begin test
*date 2015.08.01
*cs UTM33N
*cs out UTM33N
*fix 0 328000 5260000 2500
*declination auto 328000 5260000 2500
*data normal from to tape compass clino
0       1       1000   356.9275   0
*end test