Chapter 7-
This chapter overviews 3D web scenes. There are two main types of them which are Photorealistic and Cartographic. Photorealistic use imagery and shows visible things like cities. Cartographic is used with the 2D mapping techniques but in 3D. You could do these scenes in local or global mode. There are four types of elements; surfaces, features, textures and atmospheric effects. Surfaces are continuous measurements and are either DTM ( Digital Terrain Model, bare ground surface without objects) or DSM (Digital Surface Model, ground surface with objects). Features are the operational layers, they are on, above or below the surface layers. Textures are exterior or interior covers of the features. Atmospheric effects are things like lighting or fog. The structure for creating a building scene layer includes the overview (optional) which allows you to see the building as a single layer, discipline which combines category layers into disciplines like plumbing or electrical, category layer is the individual categories like windows, and lastly filter which allows you to see details in complex buildings. There are also integrated mesh scene layers which are made using large sets of overlapping imagery, and point cloud scene layers which symbolize point cloud data. Point scene layers display large amount of point data and are thinned to improve visibility. To create a web scene you have 6 steps. First choose global or local, then a base map, then you add layers, configure the layers, capture slides if necessary, and finally save and share your scene. You could also use GIS in VR which I think is really interesting and cool.