OUTPUTDATUM
Choose the datum to output
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Platform: |
OEM719, OEM729, OEM7500, OEM7600, OEM7700, OEM7720, PwrPak7, CPT7, CPT7700, SMART7, SMART2 |
This command is used to select the geodetic datum and co-ordinate epoch in which solutions are output. If not set, the factory default value is the service datum and service epoch.
For either a plate-fixed or earth-fixed output datum, using a fixed epoch will compensate for plate motion such that you get repeatable co-ordinates over time for a location. Compensation is controlled using the TECTONICSCOMPENSATIONSOURCE command and reported by the TECTONICSCOMPENSATION log. The TECTONICSCOMPENSATION log will warn when operating in a region where tectonics compensation may be imprecise.
In order for solutions to be transformed to the requested datum, the datum selected must be in the list of datums shown in the GEODETICDATUMS log.
To view the current datum, use the BESTDATUMINFO log.
Message ID: 1144
Abbreviated ASCII Syntax:
OUTPUTDATUM name epoch_option epoch
Factory Default:
OUTPUTDATUM SERVICE SERVICE_EPOCH 0
ASCII Example:
To output co-ordinates in NAD83(CSRS), 2018:
OUTPUTDATUM NAD83(CSRS) FIXED_EPOCH 2018.000
To output co-ordinates in ITRF2014, 2010.00:
OUTPUTDATUM ITRF2014 FIXED_EPOCH 2010.000
The OUTPUTDATUM command only accepts a non-zero epoch if the FIXED_EPOCH option is specified. The earliest fixed epoch must be greater than 1900.
Do not mix the OUTPUTDATUM command and the DATUM USER commands.
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Field |
Field Type |
ASCII Value |
Binary Value |
Description |
Format |
Binary Bytes |
Binary Offset |
|---|---|---|---|---|---|---|---|
|
1 |
Command header |
– |
– |
OUTPUTDATUM header This field contains the command name for abbreviated ASCII or the message header for ASCII (see page 1) or Binary (see page 1). |
– |
H |
0 |
|
2 |
name |
|
The datum output. |
Char[32] |
variable |
H |
|
|
3 |
epoch_option |
Epoch type to enter coordinates in. |
Enum |
4 |
variable |
||
|
4 |
epoch |
0 = unknown (default), |
Co-ordinate epoch (decimal year). Example: 2011.00 = Jan 1, 2011 2011.19 = Mar 11, 2011 |
Double |
8 |
variable |
|