Feature Description
Specified isoregions allow users to extract a certain number of isolines with specific values based on their needs. Users can directly input specific values, automatically generate a series of elevation values based on a set range and interval, or import specific values stored in a *.txt file.
- The source dataset used to extract isosurfaces must be a DEM or Grid dataset.
Application Example
Open the "Terrain" datasource in the "ExerciseData/RasterAnalysis" folder, which contains DEM data with a resolution of 5 meters. We will use this data for the example.
Function Entrance
- In the Spatial Analysis tab -> Raster Analysis -> Surface Analysis -> Extracts the Specified Face;
- Toolbox -> Raster Analysis tool -> Surface Analysis -> Extract Isolines/Areas -> Extracts the Specified Face.
Main Parameters
When extracting specified isoregions, you can also import or export isoline information in .txt format, or delete one or all current isoline information. The toolbar buttons from left to right correspond to Import, Export, Delete, and Delete All operations.
Start Value: The initial value for generating isosurfaces.
End Value: The maximum value for generating isosurfaces.
Step: The elevation interval between two adjacent isosurfaces starting from the Start Value. The default unit is the same as the source dataset unit.
Segments: The total number of isosurfaces in the target dataset. After the Step is set, the application will automatically calculate the number of isosurfaces.
- Value: You can directly input a specific value, or click the "Batch Add" button to open the "Batch Add" dialog. Set parameters such as Start Value, End Value, Step, and Segments for the isosurfaces, then click "OK" to return to the "Specified Isoregions" dialog.
- For setting parameters like Resample Factor, Smooth Method, and Smoothness, please refer to: Common Parameter Description.
- Click the "OK" button to complete the isosurface extraction operation.
Notes:- Currently, extracting isosurfaces from raster datasets with pixels exceeding 400 million is not supported.
Related Topics