Hello r0xx,

In the version 1.1.0 you can do the following to convert camera coordinates from WGS84 to the coordinate system on a different Datum:

`import math`

import PhotoScan

print("Script started")

doc = PhotoScan.app.document

chunk = doc.chunk

new_crs = PhotoScan.CoordinateSystem("EPSG::21781")

new_wkt = new_crs.wkt.split("TOWGS84[")[1].split("]")[0]

dx, dy, dz, rx, ry, rz, s = [float(x) for x in new_wkt.split(",")]

rx = rx * math.pi / (180. * 3600.)

ry = ry * math.pi / (180. * 3600.)

rz = rz * math.pi / (180. * 3600.)

s = 1.0 + s / 1.0E6

R = s * PhotoScan.Matrix([[1, -rz, ry], [rz, 1, -rx], [-ry, rx, 1]])

T = PhotoScan.Matrix([[R[0,0], R[0,1], R[0,2], dx], [R[1,0], R[1,1], R[1,2], dy], [R[2,0], R[2,1], R[2,2], dz], [0, 0, 0, 1]])

for camera in chunk.cameras:

new_loc = new_crs.project(T.inv().mulp(chunk.crs.unproject(camera.reference.location)))

camera.reference.location = new_loc

chunk.crs = new_crs

PhotoScan.app.update()

print("Script finished")

We'll try to implement additional functionality for the final 1.1.0 release for more convenient conversion operation.