ところを見るとJudging from the fact that
ところを見ると presents an observed fact or behavior first, then uses it as evidence for an inference.
Clue first, conclusion second
The clause before ところを見ると must describe something observable: a person's behavior, a visible condition, a result, or a performance. The following part gives the conclusion drawn from that clue.
Inference from behavior
何度も時計を見ているところを見ると、彼はかなり急いでいるようだ。
Judging from the fact that he keeps checking his watch, he seems to be in quite a hurry.
AnalyzeInference from a visible situation
店の前に長い列ができているところを見ると、かなり人気があるらしい。
Judging from the long line outside the shop, it must be quite popular.
AnalyzeHow certain is the conclusion?
The construction itself marks the second part as a judgment based on evidence. An ending such as ようだ or らしい can further soften the conclusion. A direct ending is also possible when the speaker presents the inference with confidence.
予定より早く全員が集まったところを見ると、この企画への関心は高い。
Judging from the fact that everyone arrived earlier than planned, interest in this project is high.
AnalyzeThe conclusion has no additional inference ending, but its connection to the observed evidence remains clear.
Evidence-led versus conclusion-led inference
ところを見ると explicitly states the observed clue and then gives the conclusion. とみえる instead attaches to the conclusion and presents that conclusion as apparently true.
More examples
息を切らしているところを見ると、ここまで走ってきたのだろう。
Judging from how out of breath he is, he probably ran here.
Analyze返事がすぐに来たところを見ると、まだ起きていたようだ。
Judging from the immediate reply, it seems that the person was still awake.
Analyze地図を何度も確認しているところを見ると、道に迷ったらしい。
Judging from the repeated checks of the map, it appears that the person is lost.
Analyze会場の席がほとんど埋まっているところを見ると、講演は注目を集めているようだ。
Judging from the fact that nearly all the seats are filled, the lecture seems to be attracting considerable interest.
Analyze難しい質問にも落ち着いて答えたところを見ると、十分に準備してきたのだろう。
Judging from the calm answers even to difficult questions, there must have been thorough preparation.
Analyze