Importing LAS Points Down Boreholes

Leapfrog Works imports LAS points down boreholes in LAS 1.2 and LAS 2.0 formats. An imported set of LAS files appears as one object with its associated data columns plus a LAS Boreholes folder that contains a filter for each borehole. Importing the data preserves the metadata from the LAS files, which can be viewed in the Properties window for the LAS points object and in the Properties window for each borehole.

To import LAS points down boreholes, right-click on the Boreholes object and select Import From File > LAS Data. Select the files you wish to import and click Open.

Next, the Import LAS Data window will appear. The data displayed in this window is combined from the selected files, with blank and invalid values indicated by “nan”. For example, if a borehole file does not contain columns that are included in other borehole files, those missing columns will be marked as “nan”.

Leapfrog Works expects borehole ID and Depth columns and will attempt to match the data in the files with the expected format. Select the columns to import, then click Finish. The files will be added to the project tree as part of the Boreholes object, as described above.

To view LAS points, add the LAS points object to the scene. You can also display individual boreholes by adding their filters to the scene.

LAS File Mapping

The Properties window for LAS Boreholes includes a LAS Mapping tab that shows what data files have been used for the selected borehole:

This is useful when data for a borehole originates in different files.

LAS File Inconsistencies

When importing LAS files, inconsistencies in the files are handled as follows:

  • If there are two files with the same curve values at the same depth, the duplicate values will be added to the existing column and flagged as overlapping segments. See Correcting Data Errors in Leapfrog Works for more information about correcting borehole data errors.
  • If there are more than two files with the same curve values at the same depth, Leapfrog Works will not be able to import the files. Note the conflicting files shown in the error message and reimport the files, leaving the conflicting files out.
  • If there are multiple logs of the same name in the files, Leapfrog Works will not be able to import the data. Edit the LAS file header outside of Leapfrog Works to change the names.

 

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