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If you load your data into qgis you can prepare your data to creating kmls. I'm not sure what attributes are in your dataset, and how are they separated, but maybe after to load them into qgis you need to do some additional steps, like merge, or calculation fields and then you can export your dataset separated by materials and their depth plus the surface ...


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As open source solution you may use GRASS GIS 7 which offers the module r.viewshed that computes the viewshed of a point on an elevation raster map. You can define observer_elevation=value - Viewing elevation above the ground target_elevation=value - Offset for target elevation above the ground In addition, there is r.horizon which lets you generate a ...


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Here http://www.geol-gis.ch/en/dt-dipping-plane you will find information about a tool that creates a 3D square plane of determined orientation, dip and width, at determined coordinates. The output is a 3D polygon.


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For any surface analysis involving hydrology, TopoToRaster is preferred over TIN as it has Drainage Enforcement. As @Martin noted, 5m contour interval is unlikely to be dense enough to create or track sub-meter features. That said the vertical contour interval is less important than the distance between contours in X,Y dimension. The general guideline for ...


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I did a similar thing, converting 2D polygons to 3D buildings. I did it in OL3-Cesium though, without any tool, by coding only. I had the coordinates for the polygon, and the height attribute for the building present. (Used a default value in case height was not provided). What I did was adding the 2D polygon as it is to the map. In addition to that, I ...


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Per the help file: Hard and soft qualifiers for line and polygon feature types are used to indicate whether a distinct break in slope occurs on the surface at their location. A hard line is a distinct break in slope, while a soft line will be represented on the surface as a more gradual change in slope. See also this KB article, which provides ...



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