Menu | Edit > Change > Scale Minimum Values |
Set the minimum display scale of features. This is the Scale Minimum (SCAMIN) attribute. Soundings are calculated separately from non-sounding features.
The SCAMIN value of a feature determines the display scale below which the feature is no longer visible on an Electronic Chart Display and Information System (ECDIS). The purpose of SCAMIN is to reduce the amount of clutter displayed to the ECDIS user.
SCAMIN is calculated using either a scale method or a step method. The method is chosen by selecting a minimum scale value support file for the process. The support files are located in:
C:\Program Files\CARIS\<application>\<version>\modules\S‑57 Composer\support
The following minimum scale value support files are included:
File | Description |
|---|---|
assignscamin.xml | Mapping file that applies scale factors to calculate the minimum scale values for area, line, and point features. |
assignIHOscamin.xml | Mapping file that assigns minimum scale values to S-57 area, line, and point features based on S-57 Use of the Object Catalogue (UOC), Ed. 4.0.0 June 2014. |
sdgparm.txt | Text file that contains scale factors used to calculate minimum scale values for soundings. |
assignEUIENCSCAMIN.xml | Mapping file that applies a scale value based on the IENC Encoding Guide 1.3.1 for European IENC. |
assignUSIENCSCAMIN.xml | Mapping file that applies a scale value based on the IENC Encoding Guide 1.3.1 for US IENC. |
assignBalticSCAMIN.xml | Mapping file that applies a scale value based on on S-65. |
You can modify these files or create custom files using the same structure and syntax as the original files. For more information, see Scale Minimum Values.
Interface
The Assign Scale Minimum to Selection dialog box:
Option | Description |
|---|---|
Mapping Rule Table | The file used to apply SCAMIN rules to area, line, or point features. Click Browse to select the path and file name. |
Sounding Table | The file used to apply SCAMIN rules to sounding features. Click Browse to select the path and file name. |
Procedure
1. Select the layer.
For a product, this would be the All Data or Product Specific layer. For a project, it must be an editable layer.
2. Select the features to be processed.
The selection can contain sounding features, non-sounding features or a mixture of both.
3. Select the Assign Scale Minimum Values command.
The Assign Scale Minimum to Selection dialog box is displayed.
4. Select the Mapping Rule Table.
5. Select the Sounding Table.
6. Click OK.
The minimum scale values are calculated for the selected features using the scale factors from the selected files. The results are displayed in the Output window.
