We are generating landscape images for areas of big extent. Later, in OpenSceneGraph, these images will be used as textures of the 3D model of the terrain. One way of creating this textures is generating the landscape with VUE, VNS, Terragen, mainly creating ecosystems for the different kinds of vegetation; and then rendering an ortho image from the top, and exporting the image in .tif or other formats. So, the problem is: if we just render the ortho image covering the whole area, there is no high level of detail or resolution. One solution is tilling.
In this post, the steps for creating an OpenSceneGraph (OSG) scene will be described. As stated in a previous post, OSG is a 3D graphics toolkit allows us to create an scene from our virtual environment, and launch it on realtime web applications. This step in the project is key, because the previous steps are all made taking into account that all the data must be loaded into a OSG scene.
On one hand, the landscape reconstruction is created by means of an ecosystem approach. The colormap it's a landscape classification that gives information about different the kinds of soil, and therefore of how should the terrain look according the different land uses. Grass, forest, arable land,... all they look different between them, and at the same time, all the areas classified into an ecosystem look similar.
The input data in this project, as said beofre, is a GIS database format. That means geographical information in raster and vector files. As written in the title of this post, the area in which this project focus is the city of Rome, specifically centered on the Tevere river. Here is a list of the provided files:
V-MusT.net is a Network of Excellence. The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7 2007/2013) under the Grant Agreement 270404.