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  1. 3

  2. Goals • By the end of this tutorial, we should be able to: • Classify soils and slope. • Identify development constraints based on these classifications. • Map these ideas.

  3. Retrieve the Map • Download the from the online schedule link. • Open ArcGIS, bring in the layers and assign them appropriate line weights and colors so that they are distinguished from each other.

  4. Familiarize Yourself with the Readings • From the Lynch reading: • This website is also a useful primer on the different soil types: •

  5. Classifying the Soils • The attribute table of cu_statsgo contains MUIP classification numbers. • The Soil Properties excel spreadsheet provides the different soil names, as well as the MUIP classification numbers. • To get the soil names into the cu_statsgo soils layer, we will perform a Join in ArcGIS. • Email me if you did not receive my email outlining the steps to perform a join.

  6. Classifying the Soils • Look into specific soil properties from the Champaign County Soils Report(Part 2, Table 4 has soil classification and Tables 18-23 cover soil properties) Identify properties that you think are relevant to development decisions. • Use ArcMap “Attribute Query” to select by attribute the names of the soils that you deem developable or worthy of conservation (or reclamation, if already developed) and separate them out into new layers accordingly.

  7. Slopes • Choose to use either the 5m contour intervals or the 1m intervals based on what you think is appropriate given your scale. You can look at either the county as a whole, or areas in and around Champaign-Urbana. • To get an idea of the slopes, you can measure the distance between two contour lines using the measurement tool (above) in ArcGIS. Divide the change in height (rise) by the distance on the ground (run) to get your slope.

  8. Distinguishing Landforms • Also identify any local high and low spots in order to begin thinking about drainage. Do this only in a cursory manner, however, as we will cover that aspect of natural systems in a later assignment. • You may create either 1 map or more, depending on your choice. You may look at the county as a whole, or create separate smaller scale maps focusing on areas around a municipality.

  9. Making the Maps • Once you are finished in GIS, convert the layers to EMFs and export them to Adobe Illustrator. • Diagram your maps as necessary. P. 279 of the Champaign County Soils Report contains information on conventions that are often used in soil maps, if you are looking for ideas.

  10. Making the Maps • Assign your map a legend, either in ArcGIS (Insert -> Legend) or in Illustrator. • For your memo, include a table that summarizes your classification of the soils and their characteristics that led you to your decision.