The surface analysis functionality in SuperMap iDesktopX provides three methods for isoline extraction:

• Extract All Isolines: Extracts all qualified isolines from the surface model by specifying parameters.
• Extract Specific Isolines: Extracts isolines with specific values as required by the user.
• Isolines from Click: Interactively selects isolines by clicking on the raster surface, extracting contours where output values equal the elevation of selected points.