====== Coordinate Reference Systems =======

The aim of this exercise is to show to the user how to manage Coordinate Reference Systems within the Orbit products. The user will be able to modify the existent CRS projection of different kinds of data and change the map CRS.

  * Relevant for : 3DM Feature Extraction, 3DM Content Manager, 3DM Publisher 
  * Product use for recording : 3DM Feature Extraction Standard 18.1.1

===== Preparations =====

=== Reference documentation ===

  * [[180:technology:core:crs_theory|]]
  * [[180:technology:core:crs|]]
  * [[180:desktop:map:statusbar|]]

=== Preceding Exercises ===  

  * [[exercises:desktop:manage_runs|]]
  
=== Resources ===

  * BE Ghent\MMS Orbit Run
  * BE Ghent\Reference Data

===== Exercise =====
Assign CRS to datasets and change the Map CRS. 

  - Open run \\ Open the run BE Ghent by Topcon, and check the CRS of each resource
  - Add dataset \\ Drag and drop the dataset "gent_manholes.ovf" and check the CRS of the dataset
  - Add tdataset \\ Drag and drop the dataset "ortho.omi" and check the CRS of the dataset
  - Add dataset \\ Drag and drop the dataset "topcon_gent_curbstone.ovf"
  - Define projection  \\ Assign it the projection 4326
  - Map CRS \\ Change the map CRS to 31370 Belge 1072/ Belgian Lambert 72.
// Notice the difference in performance when navigating on the pointcloud on Map 3D//

  



===== Results =====

{{  :exercises:desktop:exercise_crs.png?nolink&800  |}}