Any ecological landscape design must take the soils into consideration. This includes the mineral makeup and underlying bedrock to determine subsoil types. These will help start a rough outline for addressing specific areas to test with percolation, soil analysis, and composition.
The National Resources Conservation Service (NRCS) has a free online tool for analyzing your site's data. The free PDF that they provide at the end of your survey includes a to scale site map that you can then import into your designs. It helps shave a bit of time off my homework before we do a site assessment (that video to come). Here is a walk through using the NRCS's Web Soil Survey. If you have other tricks using the NRCS's online tool, let me know and I can include it in future edits.
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