Ashtech ProMark 200 Spezifikationen PDF herunterladen (Seite 41)

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[5]: Log button available: Points can be logged at any time

as you walk toward the stakeout point, or you are exactly

on the stakeout point.

[6]: Menu button available: You can stop the Stakeout

function (or change the stakeout point) at any time by

simply clearing Stakeout in the menu.

[7]: By providing the radius of the circle surrounding your

current location, this indication gives you a good idea of

the distance you still have to go before you reach the

target.

[8]: Open job name. The job contains the list of stakeout

points.

• When you are almost on the stakeout point, adjust the

antenna pole over the point, making sure the pole stands

in vertical position above the point, to cancel the West and

North values.

• When this is done, tap OK to start logging the point

position. Countdown is started on the point. Stay static

until the time is up.

The screen then shows the properties of the logged point

(the real-time position is averaged over the occupation

time). The description of the logged point will be in the

form:

<Stakeout_Point_ID><E/W><DeltaX><N/S><DeltaY><Fill/Cut><Fill/Cut

Value>

(See also screen example)

•Tap OK to close the window.

• Select Menu > Stakeout to select the next stakeout point or

quit the stakeout function.

Calculating a 3D

Local Coordinate

System

(Calibration)

The Calibration function (also known as the “Localization”

function) allows you to log points in a local coordinate

system, first an unknown system when starting the project,

but then accurately determined using at least three points for

which coordinates are known in that unknown system.

For a successful determination of the local system (a 3D

system), the known points should be evenly spread over the

working area. The higher the number of points known in the

local system, the higher the redundancy and the more

accurate the determination of the unknown local system.

Once the local system is determined and used, all the points

logged afterwards will be expressed in that system. In this

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