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We already have @stacksignals on Twitter.

Definitely! There has been some discussion in the teacher's lounge (all-mod chat room) about this: there is zero information available to mods from other SE sites to say what is on-topic for SP.SE. A suggested update: What topics can I ask about here? Signal processing conceptual questions. Example: Why is the Fourier transform so important? Signal ...

Provided you haven't asked the question on a different SE forum, feel free to ask it here. We have several OpenCV questions here. Just try to ascertain whether it's really a programming question, rather than one related to image processing. Calibration questions (even using OpenCV) are on-topic; questions about which function to use... perhaps not so much.

That's a great point! I'll put up an announcement for a Meta discussion about that later today.

Should we ask for a move? Yes, I would second that request although, I would not get too caught up with labels. The whole "Data Science", "Network Science" and other terms, are sitting a bit oddly with my understanding. What else does anyone expect a scientist to do other than work with data? So, independently of whether "we" are scientists or DSP can be ...

Since I was the one who closed the referenced question, I'll answer for that specific question and then try to generalize. For that specific question, I believe there are many possible answers, none of which are "technically" correct and all of which are a matter of opinion. For example: Removable Discontinuity : I don't personally think this is correct, ...

The question seems more about GIS and/or file formats than signal processing. I'd suggest leaving the question on GIS for a bit longer and see who responds.