===== Catenary Line Measurement =====

This video is about extracting catenaries in a semi-automated way as 3D line objects using the Point Clouds. \\

{{ :recordings:tutorials:gettingstarteddesktop:catenary.mp4?nolink&850x478 |}}
  * When 'CTRL' shows, hold the CTRL-key while clicking to extract all cables between two poles.
  * Also try to press 'ALT' while clicking and see what happens.


==== Step by step ====

  - Open the pre-prepared Mobile Mapping Resource
  - Set 3D Hover Preferences
  - Measure Catenary 
  - **//Optional//** : save measurements in a line vector file

==== Used Data ====

  * The Mapping Resource used for this video:  "CA Toronto" 
  * The instructions to download: [[recordings:tutorials:notes|]]

==== Reference Documentation ====

  * [[dev:technology:3d_mapping:measurements_semi_automated|]]
  * [[dev:desktop_ext:generic|]]