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Excerpt

The Contour settings part:

Contouring methods: 
Increment
Values
AML contours (Additional Military Layers)

Specify values according to the chosen method.

For Increment the options are:

Bold line everyWill be valid for the Dxf ASCII format only. Set the attribute Bathy_Major on (for instance) every 5th contour line and Bathy_Minor on the ordinary contours.
Use min level: Define the shallowest contour level to create.
Use max level: Define the deepest contour level to create.

For Values the options are:

Contour value (m): Enter a value to enter in the list belov. Note that the decimal sign is dependent on the language settings for your computer (dot or comma).

- The Append value button: Click this button to add the contour value to the list. The list will automatically be sorted.

- The Remove Selected button: Select one or more contour values in the list and the remove by clicking this button.

- The Remove All button: Clicking this button will remove all the values in the list.

For AML contours the options are:

Data compilation scale: Typical production scale for the AML. The contour lines are defined with different vertical increment for three dfined bands. The default values are for compilation scale 1:50,000.

Compilation

scale

Contour

range 1 (m)

Vertical

Interval 1

Contour

range 2 (m)

Vertical

 Interval 2

Contour

range 3 (m)

Vertical

 Interval 3

1:50,0000 - 1005 m101 - 40010 m401+20 m
1:10,0000 - 101 m11 -1005 m101+10 m
1:250,0000 - 20010 m201 - 40020 m401+50 m
1:1,000,0000 - 50050 m501 - 3000100 m3001+500 m

See this document for more information:

https://www.ukho.gov.uk/Defence/AML/Documents/Item%2025%20%20AML_Production_Spec_1.pdf

 

Other options:

Invert Z: Will multiply the Z values with -1.
Lat/Lon: Will convert coordinates from projected coordinates to geographic coordinates. Will not be valid for all export formats.

 

The Save to part:

The command can both create a dataset in the project tree and/or export the contours to a file on a disk on the computer.

  • File only: Will save to a disk disk file only, as specified in the Output file part.
  • File and project: Will save to both disk file (as above) and a projet item (as below).
  • Project only: Will save to a data item in the project only. The item will be saved in the same folder as the grid is located.

 

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