I am trying to measure all the streets in a specific development. Sometimes I get into a dead end and will like to change the end point I click on another point and the dot changes to a blue square. However when I click another point it jumps from the next to last point. How can I prevent that?
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Many thanks for explaining this using imperial measure rather than metric. Most vids use metric which just makes another conversion to imperial necessary.
Midday sun angle formula for Northern midlatitudes (23.4-66.6°N): Y = 23.4 sin θ + 90° - L where θ is the seasonal longitude of the sun (0° = March equinox) and L is your latitude.
You can also calculate the number of days since the Winter equinox (Dec 21st) by adding ten days to the day number and use this to generate the declination angle.
hi, what is the concept of elevation in the context of a line? how can we define an elevation or the concept of elevation? I suppose the line does not tilt as the elevation increases. And how can we measure elevation for a line? let's say a line with a positive slope? thank you.
Great video, Marcos. Is it possible to find your latitude with just a sextant? No other stars, no almanacs, no other tools, zero info about where you are, just a sextant?
Sextant without stars is useless, after all, its purpose is to measure elevation of stars. On northern hemisphere, you can find out your latitude by measuring elevation of Polaris (your latitude will be elevation of Polaris plus 0.8 degrees).
@@max5250 Hey Max, I really appreciate you responding. I see my mistake, though.... what I meant was can you find lat only with the sun using the sextant and nothing else, no almanacs, etc.
@@crystalblueocean When you measure elevation of the Sun, it will be different depending on your location on Earth, and time of a year. Without almanac you don't know elevation of the Sun from specific location at specific time, so you can't compare your readings and find your latitude. It is much easier to wait for the night, and find out elevation of Polaris, of course, if you are on northern hemisphere.
@@max5250 oh, ok, thanks a million, Max. So Columbus and the boys were sighting at night to get their lat. Makes sense. I was wondering what the purpose was for the 'noon sight' because I'm remembering a scene from 'Master and Commander,' where Russel Crow was training the younger officers to shoot the sun at noon.
@@crystalblueocean You can find out your latitude also by measuring elevation of the Sun at local noon, but you also have to know exact date of a year, and you still have to use almanac, because elevation of the Sun at noon is equal to your latitude only on two days a year, spring and autumn equinoxes, on all other days you have to add or subtract certain amount of degrees.
