Chapter 7: This chapter is all about 3D web scenes. This is something that really interests me as 3D models are particularly exciting to me. As the book says, we do live in a 3D world so being able to map things in 3D is crucial to fully understanding an area. This chapter teaches us the basics of 3D GIS, it also explains the benefits that we gain from making our maps 3D as we have more accurate details, and more intuitive analysis of the maps we make. With 3D maps you get a new facet of the maps, we have always had features and textures, but with 3D GIS we also have atmospheric effects. Which would be things like fog and cloud cover, as well as certain types of lighting effects. Scene layers allow you to visualize complex digital models and it allows you to interact with the buildings are have those layers applied, which in my eyes is really cool. A 3D building scene is another thing this chapter explains as it gives us the steps and the structure to follow. those steps include an overview, this is the layer that allows you to view a 3D building as a single layer, and it can be created by an exterior shell which would be made by using the building layer. Then, you have discipline, which combines the category layers into various disciplines off a building. Then you have Category layers, which represent individual categories. followed by Filter, which allows you to view details in complex buildings and you can choose to only show certain elements of the attributes selected. Then you have the integrated mesh scene layers, which are constructed by large sets of overlapping imagery. After that you have the point cloud scene layers which are described as the layers that provide a fast display of large volumes of symbolized point cloud data. Then theres the point scene layers whih are used to ensure a fast visualization in all clients and they use a cached point scene layers used to display large amounts of point data. Finally you have voxel scene layers, which are the layers that represent multidimensional, spatial, and temporal information.
Potential Application- Making a 3D landscape of buildings within the Delaware area and how long they have been there.