Survey (Triangulation) Data
These data files, entered into the RockWorks Geological Utilities datasheet, identify locations using 2 or more sightings in bearing and inclination to known control points. These can be translated to XYZ coordinates using the Survey / Triangulation command.
- Control Points: For stations to be used as control points, these columns are
required. There must be at least two control points declared in the datasheet in order for the program to compute survey station locations.
- Control point number: You must declare a station number for each control point in the listing. The program will use these numbers to identify each point.
- X-coordinate: Declares the X-coordinate or Easting for the control point.
- Y-coordinate: Declares the Y-coordinate or Northing for the control point.
- Elevation: Declares the Z-coordinate or elevation for the control point.
- Description (optional): Declares any descriptions for the control point. There is a limit to 60 characters for this field.
- ! The X, Y, and Z (elevation) coordinates must be in like units in order for the survey computations to be accurate. See the RockWorks Edit menu for Column Math tools, and the Coords menu for X,Y coordinate translation utilities.
- Survey Stations: For survey stations whose XYZ coordinates are not known and are to be computed by the program, the datasheet columns must contain these measurements:
- Sightings: This column lists the number of sightings that you have listed for that station. You must list at least two sightings for each survey station, each to a different control point. If you have two sightings listed for that row, you would enter "2" in the Sightings column. If you have four sightings listed for that row, you would enter "4" in the Sightings column.
The sightings data is listed in the subsequent columns.
- BM1, Azi1, Incl1: These three columns represent the first sighting. These columns MUST be listed immediately to the right of the Sightings column. The first column lists the number of the control point ("benchmark") to which the sighting was taken. The second column lists the bearing from the survey station to the listed control point in azimuth degrees (zero degrees represents north, and bearings increase clockwise from 0 - 359 degrees). The third column lists the inclination from the survey station to the listed control point, in degrees from horizontal. (With 0 = horizontal, positive inclination degrees represent above horizontal, and negative inclination degrees represent below horizontal.)
- BM2, Azi2, Incl2: These three columns represent the second sighting, and must be listed immediately to the right of the first set of sightings measurements. The first column lists the number of the control point ("benchmark") to which this sighting was taken. It must be a different control point than that recorded for the first sighting. The second column lists the bearing to the control point in azimuth degrees. The third column lists the inclination to the control point, in degrees from horizontal.
- BM3, Azi3, Incl3, etc.: Although only two sightings are required for each survey station, it is possible to list more. They have the same format as described above, and must be listed immediately following the second set of sightings.
- Description: (Optional) Declares any descriptions for the survey station. There is a limit to 60 characters for this field.
If there are survey stations that reference undeclared control points, the program will be unable to compute their XYZ coordinates.
Sample file: Trisurvey.atd
New-File Wizard: Surveying,
See also: Converting Triangulation Data to
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