The USDA Agricultural Research Service (ARS) Long-Term Agroecosystem Research network consists of 18 Federal and university agricultural research sites with an average of over 50 years of history. The goal of this research network is to ensure sustained crop and livestock production and ecosystem services from agroecosystems, and to forecast and verify the effects of environmental trends, public policies, and emerging technologies.
There are two tools, Swiper and Spy View, for you to compare information about the same area from two different sources or images. The sources/images are selected from the lists in the top left and right corners.
Select different images/layers from the two dropdown lists at the top of the window. The one chosen on the left will be shown with blue borders. The one on the right with a red border.
Move the slider (dot or bar) in the grey bar at the bottom to shift the dividing line over the area of interest. The red and blue progress lines show where the swiper is. The black dividing line shows where comparison is about to happen as you move the sliding bar.
The left (blue) image is displayed. Move the mouse (or your finger) over the image and a red square will replace the image within the square with the right (red) layer. To to change the size of the square, use the up and down button on your keyboard.
To make it easier to tell what part of the display shows the layers selected on the left and right, the list border, image boundaries, spy view, and swiper progress lines are all color coded. Left is always blue, and right is always red.