Menu Process > Processing Options... > 3. DSM, Orthomosaic and Index > Additional Outputs

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Access: On the Menu bar, click Process > Processing Options..., in the Processing Options pop-up click 3. DSM, Orthomosaic and Index.

 


1. Initial Processing

2. Point Cloud and Mesh

3. DSM, Orthomosaic and Index

Resources and Notifications

 

DSM and Orthomosaic Additional Outputs Index Calculator  

Allows the user to change the selected processing options and output files for the additional outputs to be generated during step 3. DSM, Orthomosaic and Index. It contains 2 sections:

  • Grid DSM: Allows the user to select the output file format for the Grid DSM.
  • Raster DTM: Allows the user to select the output file format and options for the raster DTM.
  • Raster DTM Resolution: Allows the user to define the spatial resolution used to generate the DTM.
  • Contour Lines: Allows the user to generate the contour lines using the Raster DSM or the Raster DTM and to select the processing options for the contour lines.

 

Grid DSM

Allows the user to select the desired file format for the DSM:

  • XYZ: ASCII text file with the X,Y,Z position and color information for each point of the Grid DSM.
    • Delimiter: It defines the delimiter character of the file, used to separate the values. The drop down list has the following options:
      • Space
      • Tab
      • Comma
      • Semicolon
  • LAS: LiDAR LAS file with X,Y,Z position and color information for each point of the Grid DSM. 
  • LAZ: Compressed LiDAR LAS file with X,Y,Z position and color information for each point of the Grid DSM. 
  • Grid Spacing [cm]: The spacing defines the distance between two 3D points in the Grid DSM and is given in centimeters. For example: a grid spacing of 100 centimeters will generate one 3D point every 100 centimeters. The default value is 100 centimeters.  

For more information about the file formats and the software with which these files can be opened: 202558499.

 
Note: It is possible to select more than one format to save the Grid DSM in more than one formats.
 
Note: The Grid DSM is restricted to 256 million points. If the chosen grid spacing or resolution generates more than 256 million points, then the grid sampling or resolution distance is doubled until the number of generated points does not exceed 256 million.

 

Raster DTM 

 Allows to generate the raster DTM. For more information about the concept of DTM: 217263226.

 
Important: The option to generate the raster DTM is only available when the options Raster DSM and Merge Tiles for raster DSM are selected. For more information about the options of the raster DSM: 202557769.
  • Merge Tiles (activated by default):  Generates a single DTM GeoTIFF file by merging the individual tiles. When this option is not selected, the merged DTM file is not generated and the contour lines are not using the DTM.

 

Raster DTM Resolution

Allows to define the spatial resolution used to generate the DTM.

  • Automatic (default): By default, the resolution is set to 5 X GSD. One can also easily change the resolution to multiples of the GSD. 
  • Custom: Allows to select any value higher than 5 X GSD, for the resolution of the Raster DTM.

 

Contour Lines

Allows to generate contour lines using the Raster DSM or the Raster DTM. For more information about the concept of contour lines using the Raster DSM: 202559879 and the raster DTM: 217262006.

 
Important: The contour lines are computed using the:
  • the Raster DTM, if it is already generated. For more information about contour lines, using the DTM: 217262006.
  • the Raster DSM, if the raster DTM is not generated or if the DTM tiles are not merged. For more information about contour lines, using the DSM: 202559879.
 
Important: The option to generate the contour lines is grayed out if the option to merge the tiles of Raster DSM is disabled. For more information about the options of the Raster DSM: 202557769.
  • SHP: When this option is selected, the contour lines file is generated in .shp format. 
  • PDF: When this option is selected, the contour lines are saved in .pdf format. 
  • DXF: When this option is selected, the contour lines file is generated in .dxf format.
  • Contour Base [units]: It defines the relative altitude which is used as a contour line base. It can be in meters or in feet according to the coordinate system used.
  • Elevation Interval [units]: It defines the contour line elevation interval. It can be in meters or in feet according to the coordinate system used. It can be any positive value. 
 
Warning: The Elevation Interval must be smaller than (Maximum - Minimum) altitude of the DSM/DTM.
 
Note: The smaller the Interval value, the larger the size of the contour lines file and the more processing time will be needed for its generation.
 
Note: The minimum altitude of the model, the Contour Base and the Elevation Interval define the elevation of the contour lines: The Contour Base expected to be the altitude of the first contour line. If it is lower that the minimum altitude, then the elevation of the first contour line is expected to be Contour Base+Elevation Interval. If this is still lower than the minimum altitude, then this check continues till the Contour Base+n* Elevation Interval is equal or bigger than the minimum altitude of the model.
 
Example: 
  • For a project with minimum altitude 315 meters, Contour Base = 30 meters and Elevation Interval=1 means that the first contour line (the base) will be at 315 meters (30+1*285).
  • For a project with minimum altitude 15 meters, Contour Base = 30 meters and Elevation Interval=1 means that the first contour line (the base) will be at 30 meters (30+1*0).
  • For a project with minimum altitude 315 meters, Contour Base = 0 meters and Elevation Interval=10 means that the first contour line (the base) will be at 320 meters (0+32*10).
 
Example: For a project with Minimum altitude 400 meters and Maximum altitude 650 meters and Contour Base = 0 meters, Elevation Interval = 50 meters means that that contour lines will be generated at 400, 450, 500, 550, 600, and 650 meters.
  • Resolution [units]: It defines the horizontal distance for which an altitude value is registered. The higher the Resolution value, the smoother the contour lines.
 
Example: If the Resolution is set to 100 cm, an altitude value will be registered every 100 cm horizontally.
  • Minimum Line Size [points]: It defines the minimum number of vertices that a contour line can have. Lines with less vertices will be deleted and less noise will be produced.
 
Example: If the Minimum Line Size [points] is set to 20, all contour lines that have less than 20 vertices will be deleted.
 
Note: 
  • It is possible to select more than one format in order to save the contour lines in multiple formats.
  • If step 3. DSM, Orthomosaic and Index has already been processed and the DSM or DTM are generated, it is possible to generate the Contour Lines without running step 3 again. For more information: 202558469.
  • For step by step instructions about how to generate contour lines: 202560639.

 

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