Grid Line (GriLin)
Type: Interactive/Batch Application
Grids existing line(s).
Grids existing line(s) by placing points on line or placing symbols along the line grid points. Points may be placed by linear distance from the start of the line or in distance in X or Y in the coordinate system. Original points on the lines may be deleted (except for the first and last points) or may be left unchanged when gridding the line(s).
Options for the assignment of elevations for the line points or symbols include:
An optional Duplicate Point Distance may be set to keep new points from being placed too close to existing line points. Lines may also be gridded based on a user defined baseline. See Grid From Baseline for more information.
Grid line may be run interactively on single lines identified by the user or may be run in layer mode in which the lines in a user defined layer or layer(s) are gridded.
Line before gridding
Line after gridding with High/Low Z interpolation option
Grid Line Menu Keys
The following parameters are used when gridding line in interactive and batch modes (layer mode). Pressing button 7 allows the entry of these parameters.
Defines the gridding distance. This parameter is entered in ground units.
Defines the action to be taken on the existing line points.
Defines the point insertion mode.
Duplicate point distance (0=none)
Duplicate Distance. New points that are within this distance of an existing line point will be considered duplicate and will not be placed on the line. This parameter is entered in ground units. A value of zero disables the use of this parameter when inserting points on the line.
The Elevation Mode determines the method of interpolating the elevation of new line points or symbols that are created.
The following parameters are used when gridding lines in a layer or layers. This menu is displayed when the "Grid layer" (button 2) is pressed. Gridding the lines in a layer or a group of layers is running Grid Lines in the interactive/batch or layer mode.
Grid Layer dialog
Layer of lines to grid
Defines the layers to search when gridding lines. A number line may be entered here.
Workspaces to consider
The current workspace or all open workspaces may be searched when gridding lines.
NOTE: Lines in layers that are turned off will not be considered even if they are specified.
The Grid Line parameters may be set using key-ins. This allows macros to set parameters and run Grid Line in layer mode.
High/Low Search Parameters
Please see High/Low Point Search for the setting of the High/Low search parameters using key-ins.
Intersection lines are projected perpendicular to the base lines at user defined intervals to intersect the lines to be gridded. After a base line has been identified, each line to be gridded is then identified. The three examples show the gridding from a baseline process.
The "Grid mode" must be set to "Grid from baseline" to grid from a baseline. The baseline is identified using "Id baseline" (button 3). A new baseline may be identified at any time. The example graphics window below shows the baseline as the green line and the lines to be gridded as the red lines.
Baseline (green) and lines to be gridded from the baseline (red)
After a baseline has been identified, each line to be gridded is identified using "Id line" (button 1). In the graphics window example below, the projected lines from the base line are shown in cyan. The spacing of the projected lines along the baseline is determined by the "Grid distance" parameter. The projection lines are show here as an example but are not shown when running Grid Line.
Projection lines (cyan) are show computed from the baseline
The resulting grid points are shown in the graphics window example below as crosses. The "Grid distance", "Insert mode", "Duplicate point distance", and "Elevation mode" settings are used when placing the intersecting points on the lines that are gridded. The line points may be shown in VrOne by checking "Display line points?" under Environment -> Set Display Parameters or with the Set Display (SetDis) command.
Resulting grid points (red crosses)
Grid from baseline was added in version 05.07.29t - April 2016