'how to extract variable name from a filename

I have data in many files. The file names themselves contain the variables that I need and I am not sure how to extract then, preferably by using csh commands. For example, here is a single file name:

Hourly Data for Andover, NJ - [id=k12n icao, lat=41.0089, lon=-74.7367].csv

The blank spaces are obviously invisible \ symbols (someone was really creative!). Anyway, I need to extract values for variables lat and lon for that filename. How do I do that?

Thanks

filenames


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