SuperMap provides three methods to extract isolines and two methods to extract isosurface, which share the following common parameters:

Common Parameter Settings

Datasource: The datasource containing the dataset for isoline/area extraction.

Dataset: The dataset to perform isoline/area extraction.

After selecting the datasource, the system will automatically filter datasets, displaying only DEM datasets and Grid datasets within this datasource.

Datasource: The datasource to store extracted isolines/region dataset.

Dataset: Name for the output dataset of isoline/area operation. The system will prompt for re-entry if the specified name already exists.

Resampling Factor: Determines the resampling distance during extraction, calculated by multiplying this factor with raster dataset resolution. Controls the number of control points for isoline extraction. Recommended value: 0-1 times raster resolution (default 0). Higher values produce fewer control points.

Smoothing Method: Isolines generated through raster data interpolation initially appear angular, requiring smoothing to simulate real contours.

Isosurfaces generated through raster data interpolation initially form angular polygon boundaries, also requiring smoothing to simulate real isosurfaces.

SuperMap provides two smoothing methods: B-spline and Corner Rounding. Choose "None" to keep original angular lines.

Smoothness: Both B-spline and Corner Rounding methods produce smoother results with higher values. Recommended value: 3. Valid range: [0,5]. Values 0-1 indicate no smoothing.

• Source Dataset
• Target Dataset
• Parameter Settings