The Texas RRC map is frustrating to navigate. I made this one by merging 40+ screen captures. It covers the area from Melrose to Milam, and Hwy 103 to Southern Shelby County including the County Line prospect. I use Firefox and it zooms easily. It's a jpeg file so use whatever program you want to zoom in. I also labeled a few key wells.
I used a screen capture program called Quick Screen Capture. I zoomed to the level I wanted, then scrolled around in a grid pattern doing screen captures. Then I merged them together in Photoshop. I thought it would take about 30 minutes, but it took about 3 hrs late one night. Might have to update some areas soon.