geog4046instructor

/*
 * This example shows how to add a layer list to a map where users can check and uncheck boxes to show and hide layers.
 * The code below is combined with the code to add geojson to a map, since those two things are often used together.
 * The code consists of five main parts:
 *    1. Create the basemap(s) and layer(s)
 *    2. Get geojson data and run a function to add it to a layer from step 1
 *    3. Create the function that will be run in step 2
 *    4. Create the list of layers that will appear in the control component
 *    5. Create the control component
 */