Station Observations

Station observation information can be accessed by using the Surveying > Station Observations option, or by clicking the Station Observations button in Station Calculation. This window displays the characteristics and magnitudes of the elements observed, which is described below:

Type. This is indicated by two characters representing the features of the observation. The first character represents the type of observation, and can be:

· Normal (indicated by a space “ ”). Complete angle and distance observation according to the presentation’s configuration.

· Angular (indicated by an “A”). Only angle observations (horizontal and vertical) with or without prism or stake heights. This type of observations makes calculations such as direct intersections, inverse intersections, etc; with or without levelling possible.

· Distance (indicated by a “D”). Distance observations only. This mode allows one to make trilateral calculations

· Vertical (indicated by a “V”). Only vertical angle observations that only allow levelling calculations based on the distance calculations using the calculation coordinates..

The second character type in the observation indicates the accuracy employed in the observation. It can be a space –indicating normal accuracy– or a plus “+” sign –representing an direct or inverse circle observation.

The observation type is determined automatically by the program, and no user intervention is required for this aspect.

Station. This column displays the name of the station positioned for each observation.

Target.- Target station name for each observation.

Inst.Ht.- Instrument height for the corresponding instrument set-up.

The following fields, which appear in the window, depend on the current configuration: total station or tachometer mode, reduced or geometric distance, slope or vertical angle, etc.

Code. Name of the observation’s code or codes. Should there be more than one code, these are separated by commas (,) and a space will only be allowed between a code or sequence identifier: “I” (Start) “F” (Final) or “C” (Close).

New.- Allows a new station observation to be created. In order to do so, the instrument set-up it belongs to should be selected and the name of the observed station entered. Double clicking on the first element on the New list, allows a new instrument set-up to be created. If the observation already exists, the program issues the “Repeated observation” error message and requests the data again. Once the information is entered, a blank observation data editing window is displayed.

Delete.- Deletes the station observation from the database. It can be recovered by clicking the Cancel button and it is reintroduced to the station observations list.

Sort.- The program displays the observations in the order in which they were taken by the field data recorder, or the order in which they were manually entered. The program sorts the observations numerically or alphabetically by base station and then by target station in this option.

Print.- A list is displayed containing the observations, which will depend on the configuration, in the following format:

STATION OBSERVATIONS

Station	Target	Instr.Height	Horiz.	Vertical	Net.Dist.	Stake	Code
59	60	1.382	235.6745	102.4020	364.0780	0.050
59	60	1.382	35.6790	297.5785	364.0740	0.050
59	58	1.382	381.5930	103.6315	265.7360	1.310
59	58	1.382	181.5985	296.3540	265.7330	1.310
58	57	1.493	24.5965	104.8380	364.2610	1.310
58	57	1.493	224.6015	295.1470	364.2540	1.310
57	58	1.451	224.5960	95.2135	364.2450	1.310
57	58	1.451	24.6015	304.7680	364.2530	1.310
57	56	1.451	57.3755	101.6895	196.7920	1.310
57	56	1.451	257.3820	298.2980	196.7910	1.310
56	57	1.320	257.3760	98.3645	196.7810	1.310
56	57	1.320	57.3810	301.6210	196.7830	1.310
56	55	1.320	60.8070	96.1095	554.1030	1.310
56	55	1.320	260.8135	303.8770	554.1100	1.310

It should be observed that the direct and inverse circle observations are displayed with all the data in separate lines.

Edit. Clicking this button has the same effect as double clicking on one of the observation lines. It displays the Station Observations data window.

The window is divided into two blocks: Forward Observation and Backward Observation in order to offer users complete information. It should be noted that a reading can appear as a forward or backward observation depending on the element selected from the station observation list.

The Reciprocal check box indicates whether one wishes to enter or edit the backward observation data. It will be deactivated if there is no backward observation data. Hence it needs to be enabled so that this kind of data can be entered..

Additionally, the Inverse Circle check box controls whether one wishes to use inverse circle observation data in order to achieve a higher degree of observation accuracy.

The following fields are included within each observation:

Stations. The forward observation is shown in one editable field, allowing one the chance to change its name if it does not already exist in the database. The target station is also shown, for information purposes.

Instrument Height of the corresponding instrument set-up. If this field is modified, the change affects all the point and station observations of that instrument set-up.

Code of the station observation, having the same rules explained above.

Direct observation with fields dependant on the configuration chosen.

Inverse Observation, enabled if the Inverse Circle check box is activated.

Clicking the OK button saves the information, as long as the data entered is valid. Otherwise, the program informs one about the problem and positions itself on the relevant field.