Pick By Two Points
Use the Pick by Two Points option to pick from a displayed drillhole all of the intercept(s) that lie between any two arbitrary points down a drillhole. The points do not have to correspond to intercept boundaries, neither do the underlying washability data have to be from the same horizon unit.Database connectionsandcurve specificationsmust also have been set up.
You can either load drillholes in the usual way using the Drilling menu, or you can use the Load Drillholes option 
(under the Geology > Washability Data submenu).
Drillholes can be loaded using any scheme, the records displayed in the drillhole stick do NOT have to be washability data. The washability data associated with the intercept picked will be located using relational tools according to the rules you specified in the Set Up DB Connections option. However, you will need to have defined at least one set of Database connection specifications for the datasheet of the drillhole data used.
Instructions
On the Geology menu, point to Washability Data, and then click Pick By Two Points.
The availability of specifications is checked.
Select the first point from the required drillhole by snapping (use the 
Snap to Objects or the 
Snap to Points modes) onto it.
Select the second point. Obviously, this point must be on the same drillhole, but may be above or below the original point.
You may snap the points either onto the drillhole segment or, if the hole has been labelled, onto the associated text label. Note, however, that the position obtained by snapping to a label is undefined - it may be the top of the associated interval or the bottom.
Having picked the second point, it is highlighted with a cross and the associated interval of the drillhole between the two points is highlighted in bold. You will be asked to confirm your selection.
Once you accept the picked section, the specifications available for thedatasheetof the hole selected are assessed.
If there are no specifications for this data sheet, then you are informed as you picked the first point. The option terminates.
If there is only one set of specifications, then these are used automatically.
If there is more than one, then you are offered a list of available specification names for this datasheet and you must select the one you want to use.
Washability data will be extracted from the database corresponding to the drillhole length picked (i.e. between the two selected points). If more than one seam lies between the points picked, then the seam name shown on the washability graph(s) produced contains all of the names encountered, separated by commas.
If there is more than one set of washability data for the length in question, then the data from all sets is composited by mass weighted averaging for the appropriate amount of the interval covered by the seam.
If there are gaps in the length for which there is no washability data, so that the length is only partially represented in length by the washability data, then you will be informed of this fact and offered three options:
Continue - ignoring missing data
This option pretends that the missing part(s) of the overall seam are not there and weights the existing data for the parts of the length represented by the seam data.
Continue - using default "waste" washability values
This option will only be offered if you have set up waste values as part of the database connection specifications you chose to use for this intercept. Using default values weights the actual data along with the representative amount of the missing data, thus the greater the proportion of the seam length that has no data, the closer will be the final answer to the default values (it doesn't even get this far if there is no data at all covering the seam).
Cancel and pick another intercept
This option to start again and pick another intercept.
If you select one of the Continue options, then the graph(s) produced will have an indication against the depth range of how you handled the missing data.
If you use default waste values a line will be added next to the depth range that reads "(No data for a thickness ofn.nn- waste values used)"; if you ignore missing values a line will be added next to the depth range that reads "(No data for a thickness ofn.nn- ignored)" where n.nn is the total thickness of all missing
The option then proceeds as per the Pick By Intercept option.
