The first image is a false-color composite using visible bands 1, 2 and 3 assigned to blue, green and red respectively. The Nine Mile Run slag dump exhibits a bluish-white color due to the inability
of the slag to support widespread plant growth. It appears similar to roads and developed lands. Land surrounding the dump (especially Frick Park to the north) exhibits the red color of healthy vegetation.
The second image is a false-color composite using band 1 (VIS) assigned to blue, band 5 (SWIR) assigned to green and band 10 (TIR) assigned to red. Contrast stretch type was set to "histogram equalization." The VIS and NIR bands were contracted to fit the lower resolution of the TIR band. In this image, the Nine Mile Run dump appears white, indicating a higher thermal signature. Again, the appearance is similar to developed lands and roads. The land to the north (Frick Park) appears darker ("cooler") due to the healthy vegetation.
The third image is a RECLASS image using bands 1,2,3,8 and 11. It highlights the slag pile as well as other features with a high thermal signature such as an active steel mill.