In this exercise you will be completing a binary suitability analysis for a cabin in Rusk County, Wisconsin. First,
Add a counties layer to your map document
Download the Digital elevation model (DEM) 30 Meter dataset for the state of
Wisconsin from the
WiDNR Open Data portal to
your local hard drive (not the Q: drive).
Clip the DEM to only the extent needed (i.e. Rusk County, Wisconsin), and make
sure the new clipped raster is saved on your folder on the Q:\ drive. You
can ignore any warnings received about a mismatch in datums, and you do not
need to reproject either layer to complete the clip.
Further, when clipping a raster, the default method in ArcGIS is to create a regular polygon (i.e. a rectangle) of the area even if the input dataset is irregular (as in the case of Rusk County). For the purposes of calculations below, simply use the rectangular shaped raster created from the initial clip.
The criteria determined for the location of the cabin is listed below. It must be situated
Before finding the area which fulfills all three criteria, you should first examine and visualize each criterion independently. For each, you will identify the appropriate tool to use, reclassify the raster in a way that addresses the criterion, and visualize the result.
Describe in detail (tools/plugins used, workflow, classification scheme, etc.) how you created the dataset for criterion a. (3 pts.).
Include a simple screenshot of the dataset resulting from the tool used in the previous step (1 pt.).
What percentage of pixels in the study area fulfill criterion a. (1 pt.)?
Describe in detail (tools/plugins used, workflow, classification scheme, etc.) how you created the dataset for criterion b. (3 pt.).
Include a simple screenshot of the dataset resulting from the tool used in the previous step (1 pt.).
What percentage of pixels in the study area fulfill criterion b. (1 pt.)?
Describe in detail (tools/plugins used, workflow, classification scheme, etc.) how you created the dataset for criterion c. (3 pt.).
Include a simple screenshot of the dataset resulting from the tool used in the previous step (1 pt.).
What percentage of pixels in the study area fulfill criterion c. (1 pt.).?
Next, you will find the areas that fulfill all three criteria. Describe the tool(s) used and include a screenshot of the resulting dataset (1 pt.).
What percentage of pixels in the study area fulfill all three criteria? Note: you will probably have to convert the raster data to the type “Integer” due to a limitation with the Weighted Sum tool. This tool is called “Int” and is in the Spatial Analysis toolbox.
Create a simple map (not a screenshot) of these areas below. Include a title, north arrow, and scale bar (2 pts.).
In the final part of this lab, you will display elevation data in 3D. Open ArcGIS Pro and from the “Insert” tab, click “New Map” and “New Global Scene”. Add the clipped DEM of Rusk County to the scene. Change the “Symbology” to “Stretch” and select a terrain color palette.
Next, right click on “Elevation Surfaces” from the Table of Contents. Select the option “Add Elevation Surface”. When “Surface 1” appears in the Table of Contents, right click on it and select “Add Elevation Source”. Navigate to the Rusk County DEM data and select it.
Then, from the Rusk County layer under the 2D Layers heading (not the Elevation Surfaces), right click on it and select “Properties”. From the “Elevation” tab, change the “Custom Surface” option to “Surface”.
Click on “Surface” once under the Table of Contents. From the top ribbon bar, click on “Elevation Surface Layer”, and set the Vertical Exaggeration to something you feel appropriately displays the data. Then, add the final output raster from the previous part of the lab (the one which contains all potential cabin locations). Add elevation to this data set in the same way in which we added elevation data to the DEM, but be sure to set the “Cartographic Offset” (from the layer properties) to a value of 1 so that they appear above the DEM layer.