NTv2 & Coordinate Frame rotation (geocentric domain)
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NTv2 & Coordinate Frame rotation (geocentric domain) Open
Coordinate Operation Method Details [VALID]
Name: NTv2 & Coordinate Frame rotation (geocentric domain)
Code: 1160
Operation is Reversible: Yes
Formula: See EPSG Guidance Note 7-2 (IOGP Report 373-07-2), available at https://epsg.org under Support Documentation / Guidance notes.
Example: See EPSG Guidance Note 7-2 (IOGP Report 373-07-2).
Method
Parameters:
Parameter Name Parameter Code Sign reversal Parameter Description
Latitude and longitude difference file 8656 Yes The name of the [path and] file containing latitude and longitude differences.
X-axis translation 8605 Yes The difference between the X values of a point in the target and source coordinate reference systems.
Y-axis translation 8606 Yes The difference between the Y values of a point in the target and source coordinate reference systems.
Z-axis translation 8607 Yes The difference between the Z values of a point in the target and source coordinate reference systems.
X-axis rotation 8608 Yes The angular difference between the Y and Z axes directions of target and source coordinate reference systems. This is a rotation about the X axis as viewed from the origin looking along that axis. The particular method defines which direction is positive, and what is being rotated (point or axis).
Y-axis rotation 8609 Yes The angular difference between the X and Z axes directions of target and source coordinate reference systems. This is a rotation about the Y axis as viewed from the origin looking along that axis. The particular method defines which direction is positive, and what is being rotated (point or axis).
Z-axis rotation 8610 Yes The angular difference between the X and Y axes directions of target and source coordinate reference systems. This is a rotation about the Z axis as viewed from the origin looking along that axis. The particular method defines which direction is positive, and what is being rotated (point or axis).
Scale difference 8611 No Scale factor for source CRS axes minus one, where the scale factor is a multiplication factor to be applied to coordinates in the source CRS to obtain the correct scale in the target CRS. dS = (M – 1). If a distance of 100 km in the source CRS translates into a distance of 100.001 km in the target CRS, the scale difference is 1 ppm (the ratio being 1.000001). When the scale difference dS is expressed in parts per million (ppm), M = (1 + dS*10-6). When the scale difference dS is expressed in parts per billion (ppb), M = (1 + dS*10-9).