Collect


Collect screen

The Collect functions allow you to enter field survey data and then reduce it to three dimensional coordinates. Field data may be entered manually or transferred from many Total Stations or GPS. The HI is the only question asked with GPS, and a Localization dialog, (see using with GPS) and there is no field data, just coordinates. Here are the entry fields:  See also: Function buttons.

From:
Enter the instrument point # (also called the occupied point.) This only needs to be entered when you first set-up or when you move to a new instrument setup without traversing to it. If there are no coordinates stored for the point, a box pops up to enter coordinates. (you may use assumed coordinates like 10000, 10000.) The program displays the coordinates of the instrument point at the bottom of the screen.

Ref. Point#
Enter the desired reference point # (also called backsight point) and tap OK. Set the instrument Horizontal circle to zero on the Ref. Point. If there are no reference point coordinates stored, a box pops up to enter them.
-Or- you may enter the bearing to the reference, and hit the Brg/Az button, and the program will create a ref. point for you along that bearing or azimuth. The prompt Save as ref.point# appears, enter a point# and press OK to create the point at 100′ along the line, or press Measure to shoot the distance to the Ref. point.

HI:
Enter the Height of Instrument. This normally only needs to be entered after a new instrument setup. If “no elevations” was selected in the Options function, the HI and HT fields are ignored. With GPS this is the height of the antenna on the receiver.

HT:
Enter the Height of Target. The value for the previous record will be displayed. This only needs to be re-entered if the height of target has changed since the last shot.
-or- To Shoot a Benchmark to establish a better instrument point elevation, press the Shoot BM button, described below.

After you 0 SET, Perform a Backsight check?, see the next paragraph.

To:
The next consecutive point number will be displayed and may be edited. This is where the computed point will be stored. To check your backsight, enter the Ref. point# and hit Measure then Sideshot, and the program displays the difference between the stored point and the shot. To shoot multiple angles to a point, enter a point# of 0 until after the last FS. See multiple angles below.

De:
Enter up to 20 alphanumeric characters to be used as a description for the point (optional).
-or- Tap within the edit box to modify the previous description.
-or- Use the up or down scroll arrows on the edit box, or the wheel on the side of the palm-size PC to scroll up or down the list of stored descriptions. Once one has been selected, it may be modified. See Coordinates – Descriptions for information on customizing the list of stored descriptions.

HA:
Enter the horizontal circle reading for the point.
– or- press Measure to download the data from the instrument, and proceed to the To: point field.

ZA:
Enter the zenith angle to the point. If no entry or an entry of 0 is made, the S.Distance entry will be assumed horizontal. Any angle less than 45 degrees is processed as a vertical angle. Zenith angles are corrected for curvature and refraction when computing coordinates.

SD:
Enter the slope distance.

Rec:
Displays the current record number for field data storage. New field data is always added at the end of the file. To recall and display the data for any previous field data record, enter the record number, and the program switches to Review mode, see the description below. Another way to review just the previous record is to press the Review button. If you have chosen the option to not save field data, this field will not appear.

Multiple angles
1. BS direct (0 Set on gun)
2. FS direct Measure (enter To point# 0 tells it to repeat)
3. Flip, FS inverted, Measure.
4. Enter a To point# if done or leave at 0 to keep repeating.
5. BS inverted Measure. Return to step 1.
The first multiple shot will prompt for an Angle tolerance, which defaults to 10 seconds. If a shot’s HA is different from the average HA by more than the tolerance, a warning box will come up to let you accept or reject. At this point you can also change the tolerance if desired. If rejected, Because you rejected, start the set over will appear, the bad set is still recorded for troubleshooting, and you can overwrite the same point# if desired. After a FS in reversed position (ZA>180) when you press Measure, the program will prompt you to shoot the Ref. Pt. Reversed (which should be a HA near 180) Turn to the backsight, then press OK to take a measurement. The program will then compute the HA (angle right) and convert to a normal ZA (360-reversed ZA.) After a set of angles is complete, the program uses the average HA, ZA, and SD to compute the point. Note if you later delete a shot that is part of a set, you should review the entire set to re-compute the point.

Function buttons in COLLECT

Measure
Display HA, ZA, and SD from the total station. See Instruments for operation instructions of specific total stations. If field data from the previous shot is displayed, the program automatically stores that data (as if you pressed the Store button) before taking the shot, allowing you to take and store a series of shots with simple `one-button’ operation.  With GPS, this starts downloading and displaying coordinates. With a robotic instrument, this starts downloading and displaying the field data updating as you move, press Sideshot to store a shot, or tap anywhere to stop the data download. With PocketPC’s, the left function button also is a Measure button to give you a tactile snap when you hit it (or hit Enter on units without function buttons.)

Off-targ
(off target shots). This function is useful when the point being observed cannot physically be occupied (center of a tree, overhead wire, etc.). First, measure to a convenient point which lies at right angles to the instrument and the desired target. Next, point to the non-accessible target and press Off-Targ. See below.

Review
Recall and display the data for the previous record, and switch to Review mode, see the description below. Another way to switch to Review mode (for other records than the previous one) is to tap on the Rec: field and enter a record # to go to. In Review mode, the HA, ZA, SD data may not be changed, only the To Point#, Description, HI, or HT. Remember if you change a HI or HT to hit Next Rec to change and re-calc other points that might be affected.

Sideshot
Stores the coordinates and optionally the field data. If the option to save field data was selected, this function automatically adds the field data to the end of the file as you proceed. Each “leg” of traverse data is stored in a “record”, and the record number is shown in the upper right corner of the display. With PocketPC’s, the 3rd function button also is a Sideshot button to give you a tactile snap when you hit it (or hit Esc on units without function buttons.)

NewSetup
Go back to the From (Occupied) Point# prompt to enter a new instrument setup.

Traverse
Stores the coordinates and optionally the field data, then Traverses (moves the instrument point) to the shot point. The To: point becomes the occupied point, and the From: point becomes the Ref. Point. If you are using a robotic instrument, this button is replaced with a Status button that goes to a special robotic screen see instruments.

Note
Enter a 20 character note for the previous shot. (in addition to the description.) This is used as an attribute in SDR format files or for special functions in TDS format files. Warning: if you use Notes the field data file is not backwards compatible to revisions before 2.17

Menu
Go back to the Main Menu.

When using a GPS driver, there will be 2 new buttons:
AutoInv
Displays the bearing and distance from any stored point to the current position, updating rapidly as you move. Useful to find corners by simply watching the bearing and distance update as you walk until you get near what the plat bearing and distance is. After you find a point and save it by hitting Sideshot, that point becomes the new From: point for the next AutoInverse bearing. Or hit AutoInv again and enter a different point.

Adj.Brg
Used when displaying the AutoInverse bearing, to adjust (rotate) the true bearings displayed to match an old plat bearing. The adjusted bearing is displayed below the true bearing. The computed rotation angle will be added/subtracted from all future AutoInverse bearings until you do a New Setup or choose Adj.Brg again. This does not affect coordinates that are stored, it is only for display.

Function buttons in REVIEW MODE

Done
Changes back to normal data collection mode when finished reviewing the data.

Delete
Deletes the currently displayed field data record. This function actually ‘zeroes’ the field data, retaining the record number, and asks if you want to delete the coordinate point.

Next Rec, Prev
Displays the next or previous record of field data. If you change any of the field data, you must press one of these to store the data. When you get to the end of the field data, it stops and makes a sound.

OFF TARGET shots

There are 3 different ways to do off target shots:

1. Horizontal angle offset allows you to shoot to the center of a large object such as a tree. First put the prism to the side of the object and press Measure to download the shot. Then point in front of the center of the object and press Off-targ, then press Shoot to download the new horizontal and zenith angles. (note that you can combine both Horizontal and Zenith angle offset with this method.)

2. Zenith angle offset allows you to shoot to an object that is too high for the rod, such as a cross member of a power pole. First put the prism directly below the object and press Measure to download the shot. Then move the scope up or down to the desired point, and and press the Off-targ button, then press Shoot to download the new angles.

Off target shots

3. For a Distance off target, put the prism near the obstructing object, and press Measure. Then use a tape measure to measure the perpendicular, vertical and horizontal distance offset, press the Off-targ button, then enter the offsets. Any of the 3 numbers can be zero to produce any combination of off-target shots, such as to the middle of a river or a busy highway, around the corner of a building, etc.

Perp. offset:
Enter the perpendicular distance offset from the prism to the desired point, from the instrument point of view, + = right, – = left.

Vert. Offset:
Enter the vertical distance offset from the prism to the desired point, + = up, – = down. (note this is not from the ground to the desired point, it is offset from the prism height.)

Dist. Offset:
Enter the horizontal distance offset from the prism to the desired point, + = add distance, – = subtract.

After entering the 3 offsets, the program will compute and display the new values for HA, ZA, and SD. The entered offsets are stored in a file called printout.txt in case you want to review what you entered. With GPS, these offsets are N, E, and Vertical offsets applied to the coordinates.

SHOOT A BENCHMARK

This button is used at the Height of Target question to shoot to a benchmark or other point with a known elevation to bring a better elevation back to the instrument. Before hitting this button, enter the H.T. One advantage of this function is that errors in measuring the HI or HT will not affect the points shot, and the HI and HT can even be entered as zero because of this (as long as you don’t change the rod height after shooting the benchmark.) The program will prompt for:

BM point# for Elev:
Enter the point number of the Benchmark or other point which has a good elevation. If the point does not exist in the coordinate file, the program will prompt for the coordinates. (and the elevation is the only part used, the Northing and Easting do not matter.)

Ready for shot to known elevation?

Press Yes when ready to shoot to the Benchmark and the program will download a measurement.

Computed elev:
The program displays the new computed instrument point elevation, and the difference between the computed and the original instrument point elevation. (note that these will not be actual figures if you put in an HI or HT of zero.)

Store this elev?
Press Yes to use the computed elevation for the instrument point. This elevation will replace the original setup point elevation in the coordinate file.

Comments are closed.