24.9. Occupation Points

This command is accessed through the Surveying > Occupation Points option or by clicking the relevant button in the Station Calculation section. When it is executed, the program displays a window containing a list sorted by the sequence of the occupation points.

Each occupation point is defined by its station name and its instrument height. There can therefore be several occupation points having the same station but having different instrument heights.

Each occupation point has the following information associated to it:

· Station name of up to eight alphanumeric characters.

· Instrument height (Instr.H.) in meters, which must be greater than or equal to zero.

· Initial horizontal correction (H.Corr.) in hundredths of degrees or sexagesimal degrees, depending on the configuration. This field can be left at zero if one intents the program to automatically orient itself in the calculation process.

· Instrument’s horizontal correction (Instr.HC), in seconds. This value is usually calculated by the program from the errors observed in direct and inverse circle observations.

· Instrument’s vertical correction (Instr.VC), in seconds. This is applied in the same way as in the previous field.

· Points. Indicates the points list belonging to this occupation point. It does not have to be sequential.

The buttons displayed at the bottom of editable box are defined below.

Edit. This button works in the same way as a double click on the line one wishes to edit. The program displays a window showing all the information associated with the occupation point and offers the possibility of modifying it.

If one wishes to modify the station from which the observations were taken, one simply has to select the station desired from the list of existing stations. If one wishes to create a new station, the first element on the list (New) can be double clicked and a dialog box will be displayed to enter the new station.

New. By clicking this button, the application displays a dialog box to create a new occupation point or add a new occupation point to an existing station or setting out station. This is quite common when a new instrument placement is repeated, as the heights do not coincide or the points to take with regard to the previous occupation point are not consecutive. The meaning of the fields is the same as the fields displayed when the edit button is clicked. Entering a new occupation point at the same station with the same instrument height is not allowed.

Delete. If the cursor is placed over an occupation point line and this button is clicked, the program indicates that the point observations and the stations associated to the set-up will be lost. It also requests the deletion to be confirmed. If one answers yes, the observations will be without an association.

Rename. Allows one to change the information that differentiates an occupation point from other occupation points, that is to say the station name and instrument height. Clicking this button displays a dialog box which allows one to modify the fields, as long as they do not coincide with those of another existing instrument set-up.

Renumber. This button allows one to renumber the points associated to an occupation point, as long as they do not get mixed up with those of another. A dialog box is displayed indicating the initial and final points. It requests a new initial number (by default, the same number it had). One can also decide whether or not one wishes to Respect Jumps that could exist in the original numbering by means of a check box.

Orient. The way the screen is initially presented follows the order of observations saved in the observations file or the order they were entered manually. This button allows one to modify the presentation by sorting it alphabetically or numerically. The program decides which method to use depending on whether all the station names are numerical (in which case it will be numbered numerically) or sorted alphabetically

Print. Allows one to obtain a printed list containing all the occupation points existing in the job in the order they have been entered and with the following format:

OCCUPATION POINT LIST

Station	Instr.Height	Horiz.c.	Instr.HC.	Instr.VC.	Init.St.	Final St.
1	1.525	0.0000	0.0000	0.000	1	189
2	1.540	135.3800	0.0000	0.000	190	245
3	1.545	118.7520	0.0000	0.000	246	391
7	1.540	44.6260	0.0000	0.000	392	432
9	1.610	135.1060	0.0000	0.000	433	477
4	1.505	218.0640	0.0000	0.000	478	561
5	1.570	181.5460	0.0000	0.000	562	582
8	1.490	142.7660	0.0000	0.000	583	608
11	1.460	136.4100	0.0000	0.000	609	666
12	1.575	230.9860	0.0000	0.000	667	696
13	1.445	230.5520	0.0000	0.000	697	789
6	1.500	207.7240	0.0000	0.000
14	1.585	236.6120	0.0000	0.000	790	833
10	1.490	124.6100	0.0000	0.000	834	872

Delete Horiz. Corr. One can place all the horizontal corrections of the relevant column at zero using this command in order to make a new manual or automatic survey calculation.