Batch Grid (BatGri)

Type: Batch Application

Interpolates points on a grid from existing VrOne data and writes the grid points as symbols to the current file or to a user specified output file.

Detailed Description

Batch Grid is useful for creating sparse datasets from dense datasets such as LiDAR points. When Batch Grid is started, it presents the user with a parameter dialog box. This box has several processing settings and displays a list of all files to be processed (file cross-reference table). By pressing the Add Files button, the user can add multiple files to the file cross-reference table. Each time Add Files is used, files are appended to the list. Output file names are automatically generated based on the prefix and postfix parameters specified by the user. Any output file name may be edited directly in the file cross-reference table. After files and parameters have been specified, the Run button is used to begin processing. For each input VrOne file, a DTM is generated in memory using the vector data in the input file. Points are then interpolated at even grid locations within the DTM boundary area, with the active DTM being used to determine the point elevations. The grid points are written as symbol entities either to the current VrOne file or to a new VrOne output file, depending on how the file cross-reference is set up. Because Batch Grid can potentially run for a very long time, making it more likely that something could cause the process to be interrupted, it has been designed with a built in method to restart the batch process where it last finished. This is accomplished by using the Log file and "Skip existing file" options, and is explained in the detailed documentation section for "Log File Name."

NOTE: This program can be operated without any files open in VrOne.

Local Commands

None

Parameters

DTM Points Layer

Defines the layers to search for points (VrOne symbols) to use for DTM processing. A number line may be used.

DTM Breaks Layer

Defines the layers to search for break lines to use for DTM processing. A number line may be used.

Grid Spacing

Points are created on even grid points using this spacing interval.

Grid Points Symbol Number

Grid points are written to the output VrOne file using this symbol number (graphic pointer).

Grid Points Layer

Grid points are written to the output VrOne file on this layer.

Default Output File Name Prefix

When files are added to the file cross-reference table (using the "Add Files" button), the default output file name has this prefix string appended to the beginning.

Default Output File Name Postfix

When files are added to the file cross-reference table (using the "Add Files" button), the default output file name has this postfix string appended to the end.

Skip existing files

If this is checked, then processing is skipped for input files that have an existing output file. This only applies if the output file names are different than the input file names. If this is off, then grid points is appended to any existing VrOne files. This option is useful if restarting a batch run and want to skip existing files.

Overwrite existing files

If this is checked and "Skip existing files" is not checked, any existing output VrOne files are deleted. This only applies if the output file names are different than the input file names. If this is off, then grid points are appended to any existing VrOne files.

Log File Name

Logging information is written to this file. If left blank, no log file is created. NOTE: The log file is appended to with each run, so it may be necessary to periodically delete the file to keep it from growing to an unreasonable size. If the Batch Grid operation is unexpectedly interrupted for any reason, the log file can be examined to determine the last successfully completed file. If a file was in progress, it can be deleted, and the Batch process can be started again with the option to "Skip existing files" turned on.

Load Parameters

Allows parameters to be loaded from a previously saved parameter file.

Record Parameters

Records parameters to a file.

Reset Parameters

Resets all parameters to default values.

Add Files

Displays a standard VrOne file selection dialog box, allowing multiple VrOne files to be added to the cross-reference table.

Remove All

Clears all files in the cross-reference table.

Change Output Directory

Changes the output directory of all output file names in the cross-reference table.