Examples GTModel Directory Structure 2: Texture, Material, and CMT

85 © 2016 Open Geospatial Consortium

3.4.2.4 Examples

The following example illustrates the directory structure that would store all files associated with a texture named ‘Brick’: \CDB\GTModel\501_GTModelTexture\B\R\Brick\ Where \CDB\GTModel is the root of all geotypical model datasets, \501_GTModelTexture is the directory containing all geotypical textures, \B is the directory containing all textures whose name start with the letter ‘B’ or ‘b’, \R is the directory containing all textures whose name have the letter ‘R’ or ‘r’ in the second position, and \Brick is the directory containing all texture- related files whose name is ‘Brick’. Note that the second letter of the texture name is a lowercase ‘r’ but the corresponding directory name is an uppercase ‘R’. If the Brick texture has a resolution of 1 cm and a dimension of 256 x 256 pixels, Table 3-1 tells us that the finest LOD will be 10 TS = 0.01 m and the coarsest will be 2 TS = 2.56 m, and the following files would be found in the above directory: .\D511_S001_T001_L02_Brick.rgb .\D511_S001_T001_L03_Brick.rgb .\D511_S001_T001_L04_Brick.rgb .\D511_S001_T001_L05_Brick.rgb .\D511_S001_T001_L06_Brick.rgb .\D511_S001_T001_L07_Brick.rgb .\D511_S001_T001_L08_Brick.rgb .\D511_S001_T001_L09_Brick.rgb .\D511_S001_T001_L10_Brick.rgb The following example illustrates the directory structure that would store all LODs of a material texture whose name is Church-Gothic: \CDB\GTModel\501_GTModelTexture\C\U\Church-Gothic\ Again, note that the second letter of the material texture name is a lowercase ‘u’ but the corresponding directory name is an uppercase ‘U’. If the material texture has a resolution of 15 cm and a dimension of 256 x 256 pixels, the finest LOD will be 6 and the coarsest will be −2, and the following files would be found in the above directory: .\D504_Snnn_Tnnn_LC02_Church-Gothic.tif .\D504_Snnn_Tnnn_LC01_Church-Gothic.tif .\D504_Snnn_Tnnn_L00_Church-Gothic.tif 86 © 2016 Open Geospatial Consortium .\D504_Snnn_Tnnn_L01_Church-Gothic.tif .\D504_Snnn_Tnnn_L02_Church-Gothic.tif .\D504_Snnn_Tnnn_L03_Church-Gothic.tif .\D504_Snnn_Tnnn_L04_Church-Gothic.tif .\D504_Snnn_Tnnn_L05_Church-Gothic.tif .\D504_Snnn_Tnnn_L06_Church-Gothic.tif The composite material table associated with the above material textures would reside in the same directory and be named: .\D505_Snnn_Tnnn_Church-Gothic.xml

3.4.3 GTModel Directory Structure 3: Interior Geometry and Descriptor