SurvPC Point Projection

The Point Projection command allows you to calculate the station and offset of any entered or surveyed point relative to a known centerline or baseline. It also will calculate the "Intersect", or the projection of that offset point on the baseline. This baseline "intersect", or perpendicular projection point, can be staked out and stored. The application of the routine is shown below.

Note: The alternative Station Store command will calculate a point at a given station and offset.

You must first define the baseline that can defined by one of the following methods:

Defining the Alignment — Establishing the Baseline

Note: These methods are virtually identical to that of (and discussed under) Stake Line/Arc

Define Line: Select two points to define the line.
Define Alignment: Select a predefined centerline file (.cl file), graphically pick a polyline or enter a sequence of points.
Define Arc (3 Points): Select three points on the arc.
Define Arc (PC, PT, Value): Select the start and end points of the arc and enter the radius length.

Once established, the routine will prompt for the coordinate whose station/offset is to be determined.

Main Measurement

The coordinates from which to project can be defined in one of three ways:

By point number (including the standard Point List and/or Map Screen pick methods)
By entering the coordinate values
By taking a GNSS or total station reading

Point Projection — Establishing the Coordinate [Robotic Total Station configuration]

Prism: (icon) Indicates the current lock status of the prism.
Report: (icon) Launches the standard File Selector that permits the current station/offset information to be saved to an external *.TXT file.
Settings: (gears) Permits the customization of what type of information will saved to the report.
More Information

Report Settings dialog
- Include Header: When enabled, an additional line of text will be placed at the top of the report indicating the names of the fields being exported.
- Include Cut/Fill: When enabled, Cut/Fill calculations for the point(s) will be included in the report.
  - Survey to Design: If the point has an elevation of 841 and the profile elevation is 840, it would be a Cut 1.0. This is the normal operation.
  - Design to Survey: If the point has an elevation of 841 and the profile elevation is 840, it would be a Fill 1.0.
- Include Point ID: When enabled, the Point ID associated with the station/offset will be included in the report
- Round Station to Nearest: When enabled, indicate how many significant figures of precision should be reported for the station value.
- Offset Prefix: Indicate a label to associate with Left vs Right offset values.
Point ID: Indicate the point name (number).
Note: If you want to add a range of points for Report purposes, you can enter in the points in the following format:
```
3-10,2,20-15
```
This would add the points from 3-10 sequentially, then point 2, then 20-15 sequentially. Additional controls permit the point to be specified from the Point List or a Map Screen pick.

Note: When a range of points is entered, tapping on the Report icon in the Title Bar area of the dialog box leads to a report of all stations and offsets relative to the specified horizontal alignment.
Northing, Easting, Elevation: Indicate the Y, X and Z values of the point, respectively.
As soon as enough information is entered, the Station, Offset, Elevation at PRO and Vertical Difference is displayed or the message OFF CENTERLINE is displayed (this message lets you know that a station/offset cannot be computed for the coordinates entered).
Desc: This standard Code List can be used to set the description of the point and when coupled with a related Feature Code can automate symbol and/or linework as displayed in the Map Screen.
Robotics: Use this button to configure aspects of the currently selected instrument.
Read: This command reads the instrument to gather coordinates for point projection.
Intersect: This command will project the point perpendicularly back to the centerline and enters these new coordinates into the Point Projection dialog. From there you can Store or stake the position of the point on the alignment itself.
Stake: This command will allow you to stakeout the displayed coordinates (typically used to stakeout the intersect points).
Store: Commits the point into the current job and is most often used to save the calculated Intersect point(s) to the coordinate file.
Note: Pressing Store will save a SP (store point) record in the Raw File, and a note record will indicate that the point was calculated within Point Projection.

Point Projection - RTS — Point Projection - [Robotic] Total Station Interface

Within Point Projection are these measurement/configuration tools:

Point Projection Measurement/Configuration Buttons
Legacy Icon	Graphic Icon	Availabe For	Action
			Read: Depending on whether or not the connected total station is robotic, the following options will happen: Total Station: The instrument will take a reading and report it. The reading is not stored as a point until either the Store option is selected or another reading is initiated. Robotic Total Station: The instrument will take a reading and offer to store the reading as a point.
			Store: Stores the current reading as a point. The functionality of this routine is governed (in part) by the General - Enter Key setting.
			Next: A new point for point projection can be specified.
			Modify: Permits the customization of the current Point.
			Launches the Configure interface for the active piece of equipment.
			Directs the user to the Total Station Orientation interface.
			Launches the GNSS Monitor/Skyplot command.

Note: Also within Point Projection are other common controls; most notably the various Map Screen View Controls.