Adding a transect

Transect is used for the visualization of vertical tree crown profiles. First measure the transect line across the plot (terrain profile). Because crowns usually overlap the borders of a plot we recommend you measure the transect with overlaps on both sides. After that you have to walk along one side of the transect line and measure the vertical crown profiles of trees on the other side of the transect. Measure all trees which fall inside the buffer distance defined by depth of view. Finally switch to the transect form and set the view parameters to display the trees in the transect view.


Note: 

You can switch the prompt for ID on or off in the Settings.


“Isotropic scale” option

Field-Map can visualize transects in two modes:

Isotropic is proportional, both axis have the same scale. This mode is for displaying trees and tree crown profiles in a realistic proportion.

Unisotropic is not proportional, the elevation axis is magnified. This mode emphasizes the terrain profile on the plot.


Unisotropic view


Isotropic view
  1. Switch to the Map form
  2. Select the Transect layer by double-clicking on its label in the list of layers
  3. Choose a position where you can see at least the first two points of a transect
  4. Click the New line button



  1. Fill in a data


Note: For layer Transect does not allow pen mapping. Use measurement in terrain (laser, GPS) or use Input data from keyboard function, see Settings



  1. Measure the first point of the transect line
  2. Measure the second point of the line and send data to the computer.



  1. A “New ID for Transect” message appears, if you have tag New ID prompt function for transect layer, see Settings
  2. Click OK



  1. The new transect line appears in the map. Continue adding points to the transect line
  2. Finish adding the entire transect by measuring all points of the line. The last point of the transect is usually located outside the plot border
  3. “Point is outside the plot. Accept anyway?” message appears



  1. Click Yes to accept the point



  1. Click the New point button to cancel the measurement
  2. An information message “Measurement canceled” appears
  3. Click OK



  1. Switch to the Transect form and check the results