In module 8 we created a 3d image of subsurface soil horizons. This process involved interpolating depth data from the shovel test information to create raster files representing elevation of each soil horizon. Then, using ArcScene, we displayed those rasters in a 3d image. To make the image easier to read, we increased the vertical scale, this created a comfortable distance between layers.
When looking at the shovel test data, we split it into three separate layers, one for each horizon, and assigned each horizon a different color. In both Fig 2 and 3 yellow represents A horizon, green B horizon, and purple C horizon.
Figure 4 is missing A horizon because there was no data associated with the given shapefile. While surface data may be available, it would most likely be inaccurate, because the initial data was not gathered from a site datum point, but from the surface. And depending on the region, surface can quickly change for many reasons, such as weather, land usage, etc.
|Fig 2. Shovel Test data, divided into soil horizons.|
|Fig 1. Project area boundaries, horizontal and vertical.|
|Fig 3. Proposed subsurface line in the project area.|
|Fig 4. Soil horizons: B on top, C on the bottom.|