Select a standard template to be used to define the map layout.  The map layout includes the media size, map margins and page orientation.

Two rock codes data files (asgo.csv and rockcode.csv) are provided, and can be found in the %USERPROFILE%\Documents\Geosoft\Desktop Applications \csv folder. You can specify one of these files or your own standard rock codes list file (in CSV format). If you generate your own CSV files these should be stored in the %USERPROFILE%\Documents\Geosoft\Desktop Applications \csv folder.

The structure codes and their associated colours are normally used with point (single-depth) data and are used to colour structure symbols such as structural ticks, tadpole plots, and symbols in Stereonet plots.

Resurveying is the mathematical process whereby a series of measurements of dip and azimuth taken at depths down a borehole are converted into (X, Y, Z) coordinates. Three methods are currently available:

• Radius of Curvature: this is the original resurveying method used in previous versions of Target. It synthesizes the trace as a collection of circular segments, each starting and ending at a single (dip, azimuth, depth) location.
• Polynomial Fit: the method models the traces as the polynomial of a given order which best fits the set of (dip, azimuth, and depth) values. The higher the order specified, the better the fit, with a trade-off in the overall smoothness of the hole trace.
• Straight Segments: the method creates straight line segments between each of the survey depth readings. No interpolation is done. Used primarily for trenches, or near vertical holes.

The (X, Y, Z) coordinates are stored in the 'DH_East', 'DH_North', and 'DH_RL' channels in the drillhole databases. For 'From-To' databases, these channels are calculated from the collar and survey data using the selected resurveying method and represent the midpoint of an interval.

This parameter is used for the Polynomial Fit resurveying method, described above. The order of the polynomial is reduced to no greater than the number of (dip, azimuth, depth) values, and a maximum of 20. The larger this number, the more accurately the dip and azimuth are matched at each surveyed hole depth. The smaller the number, the smoother the final hole traces.

The resurveying process calculates the hole location at a spacing determined by this interval. This interval also determines the accuracy of intersection and cut-off points, such as when a hole leaves or enters the current view "slice", and also averaging functions used when plotting graphs of data down the holes.

Target has always used the convention that dip is negative downward, so that vertically downward is –90.0.

Normally, though, vertically down is +90 degrees, and selecting the "positive" setting will cause Target to interpret all dip values in a Target database in this manner. This simplifies the import of data from other packages or formats where dips are positive downward. This convention is applied at plotting time, so if all your holes go “up” instead of “down” change this convention to correct things.

Use the drop-down list to select the method for posting data on a map.

Two methods are currently available:

Hole reference: the side on which data is plotted is decided with reference to the direction of the hole. If you turn the map so that the collar is "up" and the hole runs down, then left and right are as viewed at that time.

Map reference: Target looks at the orientation of the hole on the current map, and adjusts the plotting side accordingly. This is done with reference to the collar orientation, so cases where a hole plots nearly horizontally in a map can give somewhat unpredictable results.

Use the drop-down list to select the direction N-S sections face.

By default, N-S sections are defined with an azimuth of 0 degrees, facing west; so that South is to the left and North is to the right, and the northing value increases from left to right.

Traditionally, N-S sections have been defined with an azimuth of 180 degrees, facing east; so that North is to the left, South is to the right, and the northing value decreases from left to right.

If Yes, all values in channels set to be ASSAY type are scanned on import, and those values less than zero are replaced by positive values one-half the size (e.g. values are multiplied by –0.5).

If a default mask channel is specified (see note below), then you may use enable the usage of the mask channel to select and deselect individual data points when plotting data, or exporting data to a file.

If a mask channel is specified, and if the use of a mask channel is enabled (above), then only those data values where the corresponding mask value is not a dummy "*" will be used for plotting, or when exporting data.

When plotting, those points or intervals which are "masked out" will not appear, nor will depth ticks appear for these values.

If no mask channel is specified, no masking occurs, even if the "use mask channel" value is set to "yes".

The default mask channel has its "Class" set to "MASK", and so is recognized inside montaj Geochemistry as a valid mask channel. Only the "Mask" channel or those channels with "MASK" class are listed in the drop-down box.

Many down-hole surveys are conducted with a Kodak-Eastman survey device, which records the azimuth in relation to a magnetic compass bearing. In this case the azimuth values recorded in the collar table and dip-azimuth survey databases do not give the "true" azimuth measured relative to north. This value will be added to the collar table and survey database azimuth values before the resurveying of holes for plotting in plans, sections etc.

For instance, if magnetic north is 10 degrees west of true north, and the stored azimuth values are given relative to this value, put the value "-10" as the correction. An azimuth of 10 West will then be corrected to 0 degrees (true north) before the hole is re-surveyed. In effect, holes are rotated around the collar position by the correction angle.

When creating grids for E-W or N-S sections, the section’s "X" axis aligns with the Easting and Northing, respectively. For an angled section, however, there is no absolute reference to go by. The view origin is important to know if you wish to import gridded data (for instance) into the view, since the grid’s X-axis origin will plot on the section view’s X-axis origin. To correctly center the grid, it may be necessary to alter the grid’s X-axis origin location to correspond to the section’s X-axis origin.

The angled section view’s "X" axis origin is set to one of the following choices:

Center: by default, the X=0 location of the section is located at the center of the grid. The center is chosen as default because it corresponds to the (Easting, Northing) location specified in the section location, making it simpler to calculate the true location of all points on the section.

Left edge (start of section): in some situations, the user may have grids where the grid X=0 location corresponds to the left side of the plotted section. Select this option to correctly locate these grids without needing to alter the grid origin.