EN/CityGML-Tutorial/chapter-2:-Building/LOD2.md

@@ -99,16 +99,28 @@ In order to make a conversion from Sketchup to CityGML 2.0 LOD2 using FME, the m
 
 - All polygons must be classified to its respective SketchUp layers based on above classification.
 
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 ![image](uploads/74c84efe4dc52f281c4f59f04355a388/image.png)
 
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 A complete FME workbench along with sample input and output dataset modeled as LOD2 MultiSurface can be downloaded from **here**. The available FME workbench contains annotations for easy step by step understanding of the conversion process.
 
-**lod 2 FME workflow**  
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+**lod 2 FME workflow**
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 >The SketchUp model is created using a local (cartesian)coordiante system. No coordiante trasnformation is done during its translation to CityGML as the purpose of this exercise is to demonstrate the conversion process. For 3D data reprojection, transformer [3DAffiner](https://www.safe.com/transformers/3d-affiner/) can be used to define a coordinate transformation matrix. For defining a CRS, transformer [coordinatesystemsetter](https://www.safe.com/transformers/coordinate-system-setter/) or [reprojector](https://www.safe.com/transformers/reprojector/) can be used. More info on working with coordinate systems in FME can be found from [here](https://community.safe.com/s/article/using-coordinate-systems-within-fme).
 
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 **lod 2 FME output in FZK**  
 
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 To correctly insert building solid either [FME](https://gitlab.com/volkercoors/CiD4Sim/-/wikis/usefulTools/FME-Workbenches-(EN)) or a free [SolidInjector](https://github.com/tomeof/citygml-injector) tool can be used. To insert building solid geometry using SolidInjector, the following steps must be followed:
 
 1. Load the above produced CityGML file by clicking open button.