CAUTION: Do Not separate two alphanumeric point numbers with a dash. You must use a comma in this case since a dash is a valid character in an alphanumeric point name and commas are not allowed in alphanumeric point names.
Data Entry Basics
2.06 Directional Entries
Several factors and methods affect how "Sight" Survey interprets directional entries. Among these are:
"Sight" Survey can work in either Angles or Grads (gons). This setting is made on the Local Configuration menu (LC - Section 5.05).
"Sight" Survey can work in either North (0° or 0 gr. = North) or South (0° or 0 gr. = South) based azimuths. This setting is made on the Local Configuration menu (LC - Section 5.05). Despite the azimuth basis, quadrant based entries such as 36.3527NE are allowable angular entries.
"Sight" Survey can output data in either Bearings or Azimuths in both types of directional units (angles or grads). This setting is made on the Local Configuration menu (LC - Section 5.05).
The D.MMSS Format: Enter angular entries in the D.MMSS format by separating the degrees value from the remainder of the entry with a decimal. For example; enter 45° 30' 52" as 45.3052. There is no need to enter any trailing values if the values are zero. For instance, 45° 30' 00" may be entered as 45.30 (or 45.3). Likewise, an even 55° should be entered simply as 55.
In the D.MMSS format, you do not need a decimal points on fractional seconds entries. Simply omit the decimal point. An angle entry of 45° 25' 35.65" should be entered as 45.253565 and not as 45.2535.65.
The Grads Format: The grad (or gon) is a unit of measure equivalent to 1/400th of a circle. Grads are expressed as decimal values and may be formatted in "Sight" Survey with up to 6 decimal places.
In both degrees and grads format, directional entries may be in the form of bearings, angles left or right, deflection angles left or right, or as North or South referenced azimuths.
The information that identifies the directional type is referred to as the angle code. Angle codes may be entered by number, by two letter alpha codes, or by pressing function keys.
| Direction | Alpha Code | Numeric Code | Function Key |
| Northeast | NE | 1 | [F1] |
| Southeast | SE | 2 | [F2] |
| Southwest | SW | 3 | [F3] |
| Northwest | NW | 4 | [F4] |
| Azimuth | AZ | 5 | [F5] |
| Angle Left | AL | 6 | [F6] |
| Angle Right | AR | 7 | [F7] |
| Deflect Left | DL | 8 | none |
| Deflect Right | DR | 9 | none |
| 90° (100g) Angle Left | Perp. Angle Left | none | [F8] |
| 90° (100g) Angle Right | Perp. Angle Right | none | [F9] |
Combining Angle Entries and Codes
In "Sight" Survey, all directional data may be incorporated into a single entry in a variety of ways, from alphanumeric, to pure numeric entries. Angular data may also be identified by typing the numeric data and pressing a Function Key.
Consider these examples of acceptable combined angle entry formats:
|
Entry Type |
Data |
May be entered as |
Notes |
|
Bearing |
N 72° 37' 42" E |
72.3742 [F1] NE72.3742 N72.3742E 72.3742NE 172.3742 |
. . . . Note 1 |
|
Azimuth |
72° 37' 42" |
72.3742 [F5] A72.3742Z 72.3742AZ AZ72.3742 572.3742 |
. .. .
Note 1 |
| Angle Left | 72° 37' 42" |
72.3742 [F6] A72.3742L 72.3742AL AL72.3742 672.3742 |
. . . . Note 1 |
|
Angle Right |
72° 37' 42" |
72.3742 [F7] A72.3742R 72.3742AR AR72.3742 772.3742 |
. . . Note 1
|
| Deflection Left |
72° 37' 42" |
72.3742 [F8] D72.3742L 72.3742DL DL72.3742 872.3742 |
. . .
Note 1 |
|
Deflection Right |
72° 37' 42" |
72.3742 [F9] D72.3742R 72.3742DR DR72.3742 972.3742 |
. . . . Note 1 |
Note:
Carlson style entry. In the Carlson option, the first number represents the angle/quad code. This format allows you to complete your angle entry entirely from the numeric keypad. When using this option: = NE; 2 = SE; 3 = SW; 4 = NW; 5 = Azimuth; 6 = angle left; 7 = angle right; 8 = deflect left; and 9 = deflect right. Set on the Local Configuration menu (LC - Section 5.05).
"Sight" Survey allows you to recall a bearing between any two points residing in the memory for use in the forthcoming calculation. To recall any distance simply enter the two defining point numbers separated by either a comma or a dash, such as 14,25 or 14-25.
|
CAUTION: Do Not separate two alphanumeric point numbers with a dash. You must use a comma in this case since a dash is a valid character in an alphanumeric point name and commas are not allowed in alphanumeric point names. |
"Sight" Survey also allows the older style entries from previous versions, such as an asterisk * or the letter R followed by a beginning and ending point separated by a comma or hyphen. For example, these entries are still valid:
*15-21, *15,21, R15-21, or R15,21
In any case, if you omit one or both of the point numbers the program will prompt you to return and enter all of the necessary data.
|
CAUTION: If you are recalling a bearing and your first point is alphanumeric, DO NOT use the option of prefacing the entry with the letter R. |
Recalling the Last Used Bearing
A second method of bearing recall involves recalling the value last used. In "Sight" Survey this is an automatic function. For example, suppose you traverse from point 20 to point 21 at a bearing of 10NW and a distance of 75.5. After traversing to point 21, you want to continue on and set three more points along the same bearing and at the same distance. As you proceed to the next point, both the bearing and distance are retained from the last calculation. All you have to do is accept them by pressing [Enter] or [Tab], not re-enter them.
After the first traverse or inverse procedure in the COGO program, a bearing will be retained in the memory as a reference (or backsight) bearing. The reference bearing is simply the reverse of the bearing which you traveled on to get to the point which is now occupied. The reference bearing is the bearing referenced every time you enter an angle or deflection to the right or left. You may change this bearing through the use of the Enter Backsight Bearing (EB - Section 6.08) or Enter Backsight Point (EP - Section 6.07) routine. Enter or recall a backsight bearing in the same manner as you would enter any other bearing.