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DrillHoles

Build Status Coverage

DrillHoles.jl is a package written in Julia for drill holes desurvey and compositing.

This fork is based in the version 0.1.4 of the JuliaEarth/DrillHoles.jl, before some major refactoring. This version is currently (Apr 24) preferred for the following situations:

  • The coordinates after desurvey matches commercial softwares
  • More options of compositing
  • Warnings available for some issues during desurvey
  • Big datasets will run faster in this version

Known bugs on the other hand (corrected on the official version):

  • Merging multiple tables may generate some issues in categorical variables in some specific conditions

Installation

First, it is necessary to install Julia. Installation instructions for Windows, Linux and macOS are available here.

To install DrillHoles.jl package: open a terminal, type julia to open the REPL and then install the package with the following command. Additionally, the GeoStats.jl package is also installed to run the example later.

using Pkg; Pkg.add("DrillHoles"); Pkg.add("GeoStats")

Drill hole tables

Before using the package, it is necessary to have a collar table, a survey table and at least one interval table (such as assay and lithology). They can be passed as CSV file or DataFrame. Examples of data tables are shown below:

Usage example

using DrillHoles

# Inform drill hole tables and main columns
collar = Collar(file="C:/collar.csv", holeid=:HOLEID, x=:X, y=:Y, z=:Z)
survey = Survey(file="C:/survey.csv", holeid=:HOLEID, at=:AT, azm=:AZM, dip=:DIP)
assay  = Interval(file="C:/assay.csv", holeid=:HOLEID, from=:FROM, to=:TO)
litho  = Interval(file="C:/litho.csv", holeid=:HOLEID, from=:FROM, to=:TO)

# Desurvey drill hole tables
dh = drillhole(collar, survey, [assay, litho])

# The DrillHole object created have 4 components
dh.table  # the desurveyed drill hole table
dh.trace  # the trace file with coordinates at surveyed depths
dh.pars   # the main column names
dh.warns  # the table of warning and errors identified during desurvey

# Composite drillhole using :equalcomp mode, which seeks to create composites
# with the exact `interval` length;  borders are discarded if have length below
# `mincomp`. Max composite length = `interval`
comps = composite(dh, interval=1.0, zone=:LITHO, mode=:equalcomp)

# Composite drillhole using :equalcomp mode; composite lengths are defined
# seeking to include all possible intervals with length above `mincomp`.
# Max composite length = 1.5*`interval`
comps = composite(dh, interval=1.0, zone=:LITHO, mode=:nodiscard)

# To use the drill hole file as PointSet into GeoStats.jl framework
using GeoStats
pointset = georef(comps.table, (:X,:Y,:Z))