GEOG 487
Environmental Challenges in Spatial Data Science

Lesson 8 Overview and Checklist


Lesson 8 Overview


You have been hired by the Lake Raystown Watershed Council to identify potential sludge disposal sites within a watershed in south-central Pennsylvania. You must take into account the vulnerability of groundwater contamination, distance from surface water, and area of each potential site. To accomplish this task, you will use ArcGIS Spatial Analyst tools to recode and overlay maps depicting important factors that affect inherent vulnerability. You will then combine your results with information about surface water and site area to identify potential sites for sludge disposal.


At the successful completion of Lesson 8, you will have:

  • calculated slope from Digital Elevation Models;
  • created weighted overlays of multiple grids using the Raster Calculator;
  • identified suitable locations based on multiple input criteria using Spatial Analyst.


  1. Read all of the pages listed under the Lesson 8 Module.
    Read the information on the "Background Information," "Required Readings," "Lesson Data," "Step-by-Step Activity," "Advanced Activities," and "Summary and Deliverables" pages.
  2. Read and watch the required readings and videos.
    See the "Required Readings and Videos" page for links.
  3. Download Lesson 8 data.
    See the "Lesson Data" page.
  4. Download and complete the Lesson 8 Step-by-Step Activity.
  5. See the "Step-by-Step Activity" page for a link to a printable PDF of steps to follow.
  6. Complete the Lesson 8 Advanced Activity.
    See the "Advanced Activity" page.
  7. Complete the Lesson 8 Quiz.
    See the "Summary and Deliverables" page.
  8. Optional - Check out additional resources.
    See the "Additional Resources" page. This section includes links to several types of resources if you are interested in learning more about environmental data covered in this lesson.

If you have questions now or at any point during this lesson, please feel free to post them to the Lesson 8 Discussion.