|LAS-DataSampler 2.0 converts and sub-samples Log ASCII Standard
(LAS) data files at specified intervals to create smaller and more manageable
elog data files that may be used on any computer platform. LAS-DataSampler
reads the log header information to find the number of curves in the file.
the curves you want to save and LAS-DataSampler will sub-sample the original
data file at specified intervals and parse the selected curve data into
The resulting file may be used in software on a Mac or PC.
You may also use this application to reduce the size of large ASCII
LAS-DataSampler 2.0 was developed so that standard Macintosh
software could read and plot geological e-log data at normal scales of
presentation. The application runs on any Macintosh computer, but the converted
data files may be used on any platform including DOS, Windows and Unix.
Use LogPlot 2.0 to plot the elog data and
save the resulting charts as PICT file that may be opened and printed by
any Macintosh application. The charts are completely editable in graphics
applications such as Canvas, ClarisDraw, MacDraw, Adobe Illustrator, etc.
Logging tools typically record many times the number of data points
necessary for common presentation and display purposes. Gamma-ray log of
bore holes are commonly sampled every 6 inches. Thus, e-logs for a typical
10,000 foot drill hole consist of 20,000 data points. Most personal computers
and associated software cannot read or plot 20,000 (non-integer) data points.
LAS-DataSampler may be used to sub-sample the original curve data. For
example, sampling 1 out of every 10 lines of the original file would create
a new data file with 2000 lines of data (or samples every 5 feet).
The new file will:
have more than sufficient resolution for display purposes at normal presentation
be re-formatted (parsed) into a tab-delimited or comma-delimited ASCII
Non-LAS files will load and parse faster in Excel, BBEdit, etc.
be able to be plotted with Mac and PC software.
Charts and graphs made with the new files will:
plot faster and scroll faster in LogPlot 2.0
or other plotting software
copy and paste or open faster in Canvas, ClarisDraw, MacDraw, Adobe Illustrator,
print faster, etc.
Use this application to reduce the sample interval to reflect your needs.
Don't waste time and disk space creating files with sample resolution far
beyond the printer resolution.
Many software applications plot a limited number of samples. For example,
Excel 4.0 can plot only 4000 data points.
Choose depth range
Pick curves to save
Set sample interval
Skip (or save) header information not required by analysis software.
Skip portions of data set
Skip blank lines or lines shorter that a specified length.
Choose tab or comma delimited.
Save comments option (such as Well name, null value, LAS version, etc.)
Save null values or leave nulls blank
LAS-DataSampler 2.0 reads data saved as ASCII text or LAS version 1.0
or LAS version 2.0
LAS-DataSampler 2.0 writes data output as standard tab or comma delimited
ASCII text files in a standard spreadsheet format.