LAS Export - Enter Depth Units

On the second screen of the import window, you'll need to establish some information about how the depths are currently entered, and how they are to be exported.

1. Depth Units: Click in the radio button that corresponds to the depth units in which your LogPlot data is entered. If it's not in feet or meters, click in the Other button and type in the Units name. This information is recorded in the curves' header section of the output file.
   
2. Start, Stop, Step:
   • Starting Depth: The default value here is taken from the LDAT8 file's BH Info datasheet. Overwrite this as necessary if you wish to export a different subset of the data.
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   • Ending Depth: The default value here is taken from the LDAT8 file's BH Info datasheet. Overwrite this as necessary if you wish to export a different subset of the data.
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   • Step (Interval): ! This is an important setting, since it determines the interval at which the curves table will be recorded in the output file. (LAS format allows a single table with multiple columns.)

   • If all of your Point Data datasheets and Lithology Percent datasheets are recorded at the same depth intervals (such as 1 foot), then simply enter that value (such as 1.0) for the step interval.

     If your data are recorded at various depth intervals, then you'll need to figure out an optimal output step interval. You'll also need to decide on a resampling method, below.

     If you've been requested to submit data at a particular interval, then enter that here.

   • Resampling Method: If the data being exported is listed in the LogPlot file at different depth intervals, the program will have to resample the listings to comply with the Step setting defined above.
   • • Weighted Average: Choose this option to have the program perform a distance-weighted selection of the data values, locating the two closest depths to the resampled interval and averaging their data values based on their distance from the resampled interval. The closer value will be weighted more than the more distant value.
     • Closest Point: This option simply selects the point closest to the resampled interval.
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3. Additional Information:
   • Positive Depth: Insert a check here if the depths are to be exported as positive values.
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   • Null Value: Type here the value to be used to represent null values in the output file. For LAS files, this is typically set to -999.25, and this value will be used to represent any blank cells in the data file.
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   • Depth Decimals: Use the up- or down-arrow to set the number of decimal places to be used in the recorded depth values.
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   • Data Decimals: Use the up- or down-arrow button to set the number of decimal places to be used to record the curve, percent, interval, and other data. Note that this will be used for all exported columns - be sure to use an adequate number.
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   • Use Fixed Column Widths: Insert a check here if all of the columns are to be set to a fixed width. Use the up- or down-arrow to define the number of spaces to allot to each column. LAS files use <Space> characters to pad the columns.

   • Fixed Width off:

     0.01 55.00 10.00
     0.01 8.00 10.00

     
     

     Fixed Width on, set to a width of 8 characters:

      0.01 55.00 10.00
      0.01  8.00 10.00

4. Click Next.

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