More formal way to write "canned algorithm" This question pertains to English writing; although a English Language and Usage SE Community exists, I thought I would post here as I am writing academic literature, and most academics are on this community.

So here's my question. I'd like to say the following:
"A canned algorithm is used to find the closest distance between two locations on Earth given their latitude and longitude coordinates."

However, "canned" sounds rather informal. What are the established ways in literature to refer to a method such as this - an unoriginal, well-known procedure (although there may be several equally good algorithms out there).

A "standard algorithm"? Perhaps a "well-known algorithm"?
I would recommend naming the algorithm and then saying what library or software you obtained the implementation from. That way, the reader has enough information to adequately understand what you have done and compare it. As for an adjective: "frequently used" is sufficient, I think.