Instructions for use
Based on the given observation point and Observed Point, analyze whether the two points can see each other on the input grid surface.
- The Grid/DEM Dataset must be present in the current Map to use the Line-of-sight Analysis feature.
- As one of the components of the total elevation of the observation point, the Append: value has an important impact on the Line-of-sight Analysis results. Therefore, it is necessary to understand the surface elevation value of the observation point and the Append: value to ensure that the Analyst Result is more in line with the actual situation.
Application Example
Open the Terrain "Datasource under the Exercise Data/Raster Analysis folder, and there is DGM data with a resolution of 5 meters, which we will use as an example.
Function entrance
- On the Spatial Analysis tab-> Raster Analysis-> Surface Analysis-> Two-Point Visibility;
Operating instructions
- Specify the observation point. Draw a line segment in the Map, and the endpoints of the line segment are two points of Visibility Analysis. The line segment drawn after drawing is highlighted in the Map. The 2-Point Visibility Analysis "dialog box
- pops up. The dialog box displays the coordinate information of the observation point and the Observed Point. If the Append: value of the observation point is set, enter it in the dialog box.
- Click the "OK" button to perform the 2-Point Visibility Analysis operation.
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| Figure: 2-Point Visibility Analysis Result |
2-When the Point Visibility Analysis is complete, the Analyst Result is displayed in the Map and the Output Window. In Map, the red line indicates no intervisibility, and the green line indicates intervisibility. The result of Visibility Analysis will be given in the Output Window, intervisibility or non-intervisibility; if not, the coordinate of the first obstruction point and the elevation value recommended to be modified will be given.
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