I'm getting a weird result exporting a point cloud?

[nickponline]

Hi there,

I wanted to export a point cloud in EPSG:2956. To confirm the results I also exported the point cloud in EPSG:4326 and converted it to EPSG:2956 using Proj4 unfortunately the results are different. If there any reason for this - how do I know which is correct. Here is a sample script should the different for one point:

import pyproj

p1 = pyproj.Proj("+init=EPSG:4326")
p2 = pyproj.Proj("+init=EPSG:2956")

# a point from photoscan exported point cloud in in EPSG:4326
epsg4326_point = (-110.28868093, 64.46331476, 391.28830036)
# a point from photoscan exported point cloud in EPSG:4326
epsg2956_point = (534215.31186246, 7148835.02251115, 391.45030254)

print "Source point", epsg4326_point
print ""
print "Target point", epsg2956_point
print 'Manually converted result (different): ', pyproj.transform(p1, p2, *epsg4326_point)