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dev:technology:3d_mapping:linear_referencing [2021/11/04 12:37]
jeroen [LRS for Measurements] 		dev:technology:3d_mapping:linear_referencing [2024/01/12 08:21]
jeroen removed
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 Linear Reference Measure Option enables the option to select a vector line dataset Measure Attribute Formula for every measurement, identifying linear distance from the beginning of the closest reference line to the dropped position of the center of the measurement onto this line. Linear Reference Measure Option enables the option to select a vector line dataset Measure Attribute Formula for every measurement, identifying linear distance from the beginning of the closest reference line to the dropped position of the center of the measurement onto this line.
 +
 +===== LRS Input Data =====
 +
 +The LRS input must be a line vector dataset (.ovf, .ovt, .shp, ...) and added into the Orbit installation directory, ''program/system/linear_reference'', prior to starting the application.
  
 ===== LRS for Measurements ===== ===== LRS for Measurements =====
  
-=== Source Vector Data ===+=== Input Data ===
  
-Linear Reference input can be either Line or Point vector dataset and needs to be added as a local resource into the Workspace. \\ +Each line in the dataset is a linear reference segment.\\ To apply an offset distance from the beginning of the identified reference object, the Object attribute ''offset'' is used.
-Point datasets must have the attribute ''GPStime'' or ''OrbitTimestamp'' to order consecutive points+
  
 === Activate === === Activate ===
  
-Activate 'Enable Linear Referencing' preference in the "Measure Options" group. +  - Add the Input Data, see above. 
- +  - Activate 'Enable linear reference measurements' in the 'Measure Options' of the '3D Hover' Preferences, see [[dev:desktop:preferences:3dhover|]]. 
-If Linear Referencing is enabled, select 'Linear Referencing dataset' drop-down menu will appear on the Measure Sidebar, where all vector datasets of the correct type available in the dataset list will be shown.+  - Select linear reference dataset from the drop-down combo box added on top of the Measure Sidebar.
  
 === Measure === === Measure ===
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 ===== LRS for Search and Geocode ===== ===== LRS for Search and Geocode =====
  
-=== Source Vector Data ===+=== Input Data ===
  
-The linear reference source must be a line vector dataset and added into the Orbit installation directory, ''program/system/linear_reference'', prior to starting the application.+To search for the specific reference object, the Object attribute ''ID'', and if not available, the attribute ''Name'' is used. 
  
 === Activate === === Activate ===
 +
 +  - Add the Input Data, see above.
 +  - Select the linear reference dataset from the drop-down menu in the Main Toolbar Search component.
 +  - Enter the 'ID' or 'Name' attribute value and a distance (meters) as an offset.
  
 === Search === === Search ===