RockWorks | Utilities | Linears | 2D Endpoints - Bearing, Etc.
This program is used to compute the bearing, length, and/or midpoint of lineations listed in the main datasheet as X1 Y1 X2 Y2 line endpoint coordinates. The computed values are stored in separate columns in the main datasheet.
Menu Options
Step-by-Step Summary
- Data Columns
- Input: These tell RockWorks which columns in the current datasheet contain the input data.
Click on an existing name to select a different name from the drop-down list.
- X1, Y1: Select the names of the columns in the data sheet that contain the X and Y coordinates for the beginning points of the lineations.
These can be Eastings and Northings in meters or feet, decimal longitudes, etc. See Defining your Datasheet Coordinates for more information.
- X2, Y2: Select the columns that contain the X,Y coordinates for the endpoints of the lines.
- Output: Use these prompts to define where the output computations are to be recorded.
! Any existing data in these columns will be overwritten.
- Bearings: Choose the column in the datasheet into which any bearing computations will be stored. If you don't activate this computation (see below), this will be ignored.
- Lengths: Choose the column in the datasheet into which any lineation lengths will be stored. If you don't activate this computation (below), this will be ignored.
- Midpoint X, Midpoint Y: Choose the two separate columns in the datasheet into which the X and Y coordinates for the lineation midpoints will be stored, if requested. If Compute Midpoint, below, is not activated, these will be ignored.
- Lineation Statistics: Click this tab to define which calculations are to occur.
- Compute Bearings: Insert a check here if the program is to compute the bearing of each lineation, in azimuth degrees, from the X1 Y1 coordinate to the X2 Y2 coordinate. The computed bearings will be stored in the Bearing Column you defined under Data Columns.
- Bi-Directional (0 - 180 degrees): Choose this if the computed bearings should range from 0 to 180 degrees only. If selected, the program will compute the bearing from X1Y1 to X2Y2 and, if > 180 degrees, then subtract 180 from the value for recording to the output column.
- Uni-Directional (0 - 360 degrees): Choose this if the computed bearings should range from 0 to 360. If selected, the program will compute the bearing from X1Y1 to X2Y2 and record that bearing in the output column.
- Decimals: Type in the number of decimal places to be recorded.
- Compute Lengths: Check this option for the program to compute lineation lengths and record them in the Length Column you defined under Data Columns.
- Units: Choose the desired output units.
- Decimals: Type in the number of decimal places to be recorded.
- Compute Midpoints: Check this option for the program to compute the lineation midpoints. These will be stored in the Midpoint X and Midpoint Y columns you defined under Data Columns.
- Access the RockWorks Datasheet program tab.
- Create a new datasheet and enter or import your line endpoint data (X1Y1X2Y2).
Or, open one of the sample files and replace that data with your own. See Data Layout for datasheet examples.
! Click the Example button at the top of the window to load a sample file that is installed with the program.
- Select the Utilities | Linears | 2D Endpoints - Bearing, Etc. menu option.
- Enter the requested program settings, described above.
- Click the Continue button to proceed.
The program will compute the lineation bearings (from 0 clockwise to 360 degrees), and/or the lengths (in your X and Y coordinate units), and/or the midpoints for all of the lines in the data sheet, and it will store these computations in the selected column(s) in the datasheet.
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