रिक्त स्थान की पूर्ति सही विकल्प से करें: समानांतरता (Parallelism) एक सिद्धांत है जिसका उपयोग _______ में किया जाता है, जो यह बताता है कि 'विभिन्न विवरणों के माध्यम से खींची गई सभी किरणें सर्वेक्षण स्टेशन से गुजरनी चाहिए।'

In survey work using a total station with reflector measurements, which of the following sequence of temporary adjustments must be performed at a station?

While carrying out a total station survey on one bank of a 250 m wide river, it is necessary to plot electric transmission posts on the opposite bank. No provision exists for crossing the river and the posts are inaccessible. In which mode should the survey work be done?