Line-of-sight analysis has significant application value in maritime, aviation, and military fields. Examples include radar station placement, TV transmitter station setup, route selection, maritime navigation, military position deployment, observation post arrangement, communication line installation, and analysis of non-visible areas. For instance, low-altitude reconnaissance aircraft need to fly within radar blind zones to avoid detection. The analysis primarily involves two aspects: visibility analysis between two or multiple points, and viewshed analysis to determine observable areas from given vantage points.

• Viewshed Analysis: A viewshed represents the visible ground area from one or multiple observation points. Conducted on raster data, viewshed analysis identifies visible areas from a specified observation point with given elevation parameters. The analysis result generates a raster dataset showing visibility coverage. This method applies to transmitter tower placement, radar coverage planning, and forest fire observation tower construction. It has extensive applications in navigation, aviation, and military operations.
• Visibility Analysis: SuperMap surface analysis provides two-point visibility analysis and multi-point visibility analysis based on the number of observation points.
• Two-Point Visibility: Two-point visibility analysis determines mutual visibility between any two points on a raster surface.
• Multi-Point Visibility: Multi-point visibility analysis evaluates mutual visibility among multiple points on a grid surface.

Caution:

When performing terrain visibility or viewshed analysis in 3D Scene, ensure the "Terrain scale factor" is set to 1 for accurate results.