Time-dep Coordinate Frame (geocen) & Geocen translations by XYZ vel (INADEFORM)
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Time-dep Coordinate Frame (geocen) & Geocen translations by XYZ vel (INADEFORM) Open
Coordinate Operation Method Details [VALID]
Name: Time-dep Coordinate Frame (geocen) & Geocen translations by XYZ vel (INADEFORM)
Code: 1161
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
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 Yes 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).
Rate of change of X-axis translation 1040 Yes Time first derivative of X-axis translation.
Rate of change of Y-axis translation 1041 Yes Time first derivative of Y-axis translation.
Rate of change of Z-axis translation 1042 Yes Time first derivative of Z-axis translation.
Rate of change of X-axis rotation 1043 Yes Time first derivative of X-axis rotation.
Rate of change of Y-axis rotation 1044 Yes Time first derivative of Y-axis rotation.
Rate of change of Z-axis rotation 1045 Yes Time first derivative of Z-axis rotation.
Rate of change of scale difference 1046 Yes Time first derivative of scale difference.
Parameter reference epoch 1047 No The reference epoch for the parameters of a time-dependent transformation.
Point motion velocity grid file 1050 No The name of the [path and] grid file containing velocities.
EPSG code for Interpolation CRS 1048 No The EPSG code for the CRS that should be used to interpolate gridded data.
Source epoch 1068 No Epoch to which coordinates that are input into this coordinate operation are referenced. A value of -999 is used as a flag to indicate that the epoch should be user-defined input.
Target epoch 1069 No Epoch to which the coordinates that are to be output from this coordinate operation are to be referenced. A value of -999 is used as a flag to indicate that the epoch should be user-defined input.