Intervisibility
Intervisibility refers to the analysis of a sight line between an observer and a target feature through potential obstructions such as 3D surfaces or features.
Getting ready
We continue to plan the topographic survey campaign mentioned in Chapter 9, Working with Spatial Analyst, in the Analyzing surfaces and Analyzing the least-cost path recipes. In this recipe, you will analyze the visibility between three geodetic points and buildings (reservoirs and two churches).
TriangulationPoint3D
has an attribute field named SurveyInstruments that stores the normal height (H) of the instrument calculated as the sum of the Height Black Sea'75 field and a constant value of 1.5
meters (height of the survey instrument).
Buildings3D
has a field named H_Buildings that stores the height calculated as the sum of the Z_Mean, the normal height (H) field, and the approximate height of the building. The Z_Mean field has been calculated using the Add Z Informative tool.
The Buildings3D
feature and...