First, this whole query will probably seem pretty ignorant - I am a new user but I cannot find a specific answer to what I want so I decided to ask.
I downloaded some elevation data for a couple of counties from here: Data Download | TNRIS - Texas Natural Resources Information System
What I got for adding to my ArcMap project was a .shp file that seems to just be solid bands across the area and a .sid with band_1, band_2 and band_3 to add.
My goal: making a contour map of the area
My questions:
1. What is this shapefile? Do I even need it?
