Landonline will accept a bearing-only or distance-only vector if the To mark exists in Landonline.
You need to calculate distance when the distant mark doesn’t exist in Landonline
If the distant mark doesn’t exist in Landonline, the vector needs to include a calculated distance.
If you calculate a distance, ensure:
- it represents the ellipsoidal distance
- you’ve accounted for line scale factors and projection corrections that need to be applied to a calculated grid distance.
Capture a bearing-only observation to a Trig or distant mark which exists in Landonline
To capture bearing-only observations to a distant trig, you’ll need to connect the vector to the existing node for the distant mark, and leave the distant field blank.
You may find it easier to locate and capture the existing mark first.
Locate and capture the existing distant mark
Step 1. Move the spatial view to the general location of the distant mark.
Step 2. Open the Layers panel from the right-hand spatial tools control bar.
Step 3. Expand the Marks selection (a) and turn on Underlying marks (b).
Turning on underlying marks too early can slow down the spatial view. To avoid this:
- zoom in to the general location of the distant mark
- then turn on underlying marks to help identify the specific underlying mark.
Use filters to help find the required mark
Filters can help you find the required mark:
- Select the arrow to the left of Underlying marks to filter the Underlying marks layer by Condition, Horizontal Order or Vertical Order
- Select the arrow on the left of each option to see more.
In this example, lower order marks are hidden – to isolate the high order trig mark.
Step 4. Locate the existing mark for the Trig or distant mark with the Inspect and Adopt function.
Step 5. Select Adopt this mark – at the bottom right – to add the mark to the dataset.
The mark will be automatically linked and shown in the spatial view with a blue box around it.
Step 6. Edit the mark details at the bottom of the Marks panel if necessary.
This example shows the change of State from Adopted to Old.
Capture the observation to this distant mark
Step 1. Open the Vectors panel on the left-hand side and select Add vector at the bottom right.
A new vector is added with most information copied from the vector row above. The Mark To field usually refers to the newly adopted mark.
Step 2. Edit the Vector details to capture the observed bearing.
Check and edit the From and To marks as necessary.
Amend the Bearing
If the observation is bearing-only:
- delete the Dist value
- change the Dist Type to (None)
- change the Bearing type to Measured.
Capture a distance-only vector
To capture distance-only vectors, leave the bearing field blank. This example shows a distance-only vector.
