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Spectra Precision FAST Survey Reference Manual User Manual

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When OK is pressed, a second screen appears which controls the range of points to be translated.

Assuming you have 55 points in your file, you could "preserve" these 55 points by adding 100 to the point numbers, and

saving the transformed points as 101 through 155. If you choose Overwrite Existing Point IDs, the Add to Point

Numbers option is not available. If you choose Use New Point Numbers, then you will be prompted to enter a new

point number for each existing point to be overwritten (recommended only when you are overwriting a few points). You

can even store the transformed points in a completely new CRD file by selecting Store in New CRD File.

Raising and Lowering Elevations:

Users often ask, "How do I raise or lower elevations on a range of points?" The

answer is the Translate option in the Transformation routine. To adjust elevation only, enter only the delta elevation

(leave Northing and Easting at 0 translation).

Rotate

The ROTATE tab is used to rotate points in a coordinate file. Enter the desired degree of rotation into the degree of

rotation data field. Specify the rotation base point. This can be accomplished by either entering the point number of the

desired point manually, or by selecting the point using the List or Map icon. You may also enter in coordinates for the

rotation point if the point is not present in the coordinate file. Lastly, you can define the rotation by referencing two

points (such as "From 1, To 2"), then specifying the desired new bearing for these points. Even the new bearing itself

can be computed from two points used as a reference.

The second screen appears, which allows you to set the range of points to transform and choose how to store the newly

calculated points. For all rotations, the rotation value is written into the RW5 file as dd.mmss (the current angle format).

Scale

The scale tab is used to scale the points in a coordinate file. The northing, easting, and optionally, the elevation, are

multiplied by the specified scale factor. Enter the desired scale factor in the scale factor field. Select the base point by

entering the point number of the desired point manually, or by selecting the point using the List or Map icon. You may

also enter coordinates for the scale base point if the base point for scaling is not present in the coordinate file. The

coordinate of the base point will remain unchanged. All other points will scale. If the Ignore Elevations toggle is

enabled, then only the northing and easting values are scaled. Note that you can scale your points from base coordinate

0,0,0 by entering a scale factor and answering Yes to the warning screen.

Raw Data Records

The transformation raw data records are expressed as one string per command with the values separated by spaces.

These records will be recorded to the raw data file for processing purposes so that all dedicated processors will

recognize the records and perform the transformation during re-processing.

TRANSLATE

: Range Dx Dy Dz Process_Zero_Z

ROTATE

: Range Angle Base_Y Base_X

SCALE

: Range Scale Base_Y Base_X Use_Z

ALIGN

: Range From1 To1 From2 To2

Example: