@Snerp I'm assuming it was covered up using MSPaint (most common program to do stuff like that. If you had the file and program it was made on (see above), you could easily use the eraser tool or whatever to remove the black stuff. Getting the file is the tricky part. In theory you could open up the web page script and grab the file from there, but it would take a while of code digging.
@SPYROHAWK that can't work because each square of the map is saved as a PNG. PNG files (and image files as a whole) don't save separate layers; you'd need a PSD, XCF, or similar formats that DO save layers. you won't ever find PSD/XCF files for map sections, because they don't exist; the map on the build server is rendered into the aforementioned PNG files, and those files are rendered on the map.
also, you said it was covered up with MSPaint (it wasn't, i'm 100% sure they covered it up on the build server). MSPaint doesn't have a layer feature, so if you saved one of these PNG sections and erased the black parts, you'd only see white/transparent pixels "underneath", because MSPaint doesn't work like you think it does.
@memethyl so a few things. I did not think it was made of actual blocks because there are some diagonal portions that don't seem possible with blocks. If it is blocks, you are correct, it's not possible
But you are wrong about the layer thing. If you have a picture on MS paint then draw over it, you can remove the drawn on portion without damaging the actual picture.
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