Many jobs require data to be present in 3D. There are various reasons for that. Visually it looks fascinating and provides more information as compared to 2D data with elevation markings.
For example if you are looking at a building footprint in 2D. You have to put efforts to find the labels which are above a certain value . Of course you can colour code them but the data might not be valuable for a layman as one may not have that imagination.
Creating a 3D profile for the same makes more sense as it is understandable by any person and deducing conclusions from such data is easier.
Many softwares are available by which you can process 3D data and visualize it such as CAD, ArcGIS, MapWindow, QGIS, Grasshoper etc. I will show you one example:
3D Contours(Elevation and Depth)
In the above example I have created Topography and Bathymetry contours for The Broad Channel, Queens, New York using the elevation data. This is very useful when you are surveying an area as it is more informative and gives you strong base to analyse the results. By colour coding one can easily find out the areas of a particular elevation or depth.
You can also create 3D features which are similar to the 3D contours but the output isa pure solidin this case. The example is given below
3D footprint of Broad Channel Buidlings
These are 3D buildings which can be generated from 2D features and combining it with elevation.
One can also generate 3D surfaces such as of reservoirs which are used for calculation of silt, depth analysis, bathymetry etc.Example is given below:
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