I have about 10 ASCII files from the same governmental source imported to my ArcMap project. Half of the files came in with a defined coordinate system and projected fine. The other half have an undefined coordinate system and I cannot figure out how to define them. I have checked permissions and I have write permissions for all. The metadata tells me the file has a datum of NAD 1983 and a Transverse Mercator projection. I have tried defining the projection as a multitude of various coordinate systems to no avail. I keep getting this box... What am I doing wrong?!
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The overall objective of my work is to understand water quality of various aquifers. I have a large database of water wells (~60,000) and each well record comes with a drilled well depth but does not have a reported producing aquifer/geologic unit. I am relatively new to ArcMap/Scene but do have access to most extensions such as the 3D analyst. The question would be: is there an efficient way to assign each of these 60,000 wells with the name or code of the aquifer that they are producing from? My thought was to have the well depth extracted as the well point's z-value and then have the various subsurface elevations of all of the aquifers also extracted as z-values. Could I use a type of script/code to do perform some nested if statements, something along the lines of: "if z-value < 20 m ; Scollard ; if z-value < 60 m Bearpaw ; Horseshoe"? Looking for any thoughts/advice or to be steered in the right direction. Many thanks!
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