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Helmert
Localization
Computing Helmert
Parameters from a
Multi-Point
Localization File
Staking Out Points
1. With your job open in FAST Survey, click on the Equip tab
and then on the Localization button.
2. Tap on the GPS tab and select "Helmert" from the Multi
Point Method field.
3. Tap on the By Helmert tab and then enter the seven
parameters defining the new datum of the local grid.
4. Tap
. The localization process is now complete and
active. This means every new point you will now survey will
be expressed on the local grid.
• Follow the instructions to perform a multi-point
localization.
• After all the points have been defined, tap on the By
Helmert tab.
• Tap on the Calc from Pts button. FAST Survey computes the
seven Helmert parameters and displays the result in the
corresponding fields.
• To save the seven parameters as a TXT file, tap on the
Output to Text File button and name the file.
1. Run FAST Survey and open the job containing the points
you want to stake out.
2. Tap on the Survey tab and then select Stake Points. The
screen now displayed allows you to stake out points.
3. On this screen, FAST Survey asks you to choose the point
you want to stake out. You can either type in its
coordinates in the Northing, Easting and Elevation fields, or
select a pre-defined point from the points list (see File>List
Points). You can also define graphically the point by
tapping on the point on the graphic screen, or define the
point according to azimuth, slope and horizontal distance.
RTK Surveying
63
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