Umi to Kaze no Oukoku

Even when Paloma University was on summer vacation, Shaw was busy.

At noon on the Summer Solstice, I had to make sure that the angle at which the sun would plug in on the northern regression line would be at right angles and do a quick measurement on land a few parns away on a dragon, but I had to verify if the northern regression line was correct in the first place.

"It's true that a mathematician in Egypt or somewhere saw the sun in the well in the summer solstice, traveling to a remote location in Loba, and only two-thirds of the sun in the well, so you calculated the size of the Earth."

Shaw wished he had taken classes more seriously without looking at all the girls' hair, but he gave up his choice and was thinking of heading to Sands to verify the northern regression line.

"On Summer Solstice Day, I think you should break up with me and Captain Regnum and measure it. Wonder is used to measuring, so make sure the sunlight is 90 ° on the ground when the sun goes south at noon on the northern regression line. Me and Seagal will measure a few parns away from the same longitude on the northern regression line. And if we measure the distance of that observation point, we should be able to calculate the size of the earth…"

Wonder looked at the map and confirmed that the northern regression line leads to the isolated island at the southern end of the Kingdom of Cazaria.

"You measure at this same longitude. But can you accurately measure the distance between measurement points, both at sea and on the ground?

Well, if you're on the Golce continent, if you go down the northern regression line and south, it's shore... oh, but this could be awkward. "

Wonder looked at the map's borders and gave up saying that in the Golce continent, where small countries are disturbed, they cross countries and countries.

"Uh-huh? If it's the angle of sunlight, doesn't it have to be the summer solstice? Yes, even if it's not on the northern regression line, it's good!

Ha, Shaw remembered Professor Baggins laughing as he said he had a great summer vacation.

"Shit! Professor Baggins was laughing when I'd realize! Wonder, Seagal, it doesn't have to be a summer solstice or a northern regression line to measure the size of the Earth. It doesn't have to be 90 °, it doesn't matter..."

Shaw realized his memories were confusing. It was an episode of proof that the Earth was a sphere when the sun appeared in the northern regression line well at noon on the summer solstice but not in the northern regression line at the same longitude.

"Someone who proved it was a sphere calculated it to the size of the Earth, so I assumed it would be a summer solstice. You idiot, in the Southeast Islands, I deliberately measured it on the Southern Regression Line on the Winter Solstice."

As Shaw was weakening on his bonyardness additions and subtractions, Wonder and Seagal asked why Professor Baggins was given homework to measure on the Northern Regression Line on Summer Solstice Day.

"Maybe they expected me to find it good, anytime, anywhere. And I wonder if you actually wanted me to see what I was thinking in theory... because the sun shines at 90 degrees against the ground when the sun goes south in the summer solstice."

Shaw sat in his chair like he was out of strength.

"I don't know, I'm starting to feel impossible finding a new route... but you have to do it!

If you're depressed, you can't help it. Measured with Sassa at Shaw and Captain Regnum, measured the distance between the observation points, and Shaw calculated the size of the Earth and put it out.

"There was a slight error with the size I calculated earlier. Maybe because the error of traveling alone was mixed with the sea and shore, so the distance was out-of-the-box"

It was Shaw who was depressed by his mistake, but although there were errors, he was convinced that this would be closer to the Golce continent to sail east from the Southeast Islands. Shaw wrote the results of the measurements and the formula in the report.

"Later, the accuracy of this map is the problem, isn't it? It's summer vacation, and why don't we measure the terrain and make a map? Just a little bit, I wonder if it would be a test of the accuracy of the map"

Shaw remembers someone walking and measuring the Japanese archipelago and making a map.

"I think the Kingdom of Kazalia and the Kingdom of Iran have a lot of trading ships from the Southeast Islands, and the maps are accurate. But the Golce continent has many ships to visit in the north and east, but you can't trust maps of the south and the west."

"The eastern route from the Southeast Islands is its obscure West Bank - the interior of the Golce continent seems to be a lot of areas where no one has gone yet. For once, along the coast, it is measured by boat and mapped..."

The northern and eastern shores also bordered the country, while the southern and eastern shores were close to blank paper only on the coastline.

"The coastline is also subtly different from map to map."

Compared to other maps, I did find some differences.

"Hey, Wonder? East route to the Golce continent, but sailing east just below the equator is hot and hard to replenish the water, isn't it? It's a little easier on the Northern Regression Line, but the distance is far away, and it's best around the Southern Regression Line in terms of proximity, but if you still can't replenish water and food along the way, it's tough."

Shaw, in large part, cut the middle of the map.

"What are you going to do?

Seagal and Wonder gave a surprise to Shaw, who suddenly cut the map.

"What will they do, even though the map is expensive!

Shaw calculated the size of the earth to match the scale of the map to pinch white paper between the edges and edges of the map.

"Now it's easier to think about"

Wonder takes a serious look at the white part of the unfamiliar map that Shaw cut in the middle of the map and retightened it to the size of the Earth on white paper.

"If you look at the map this way, you can see that the eastern route is close to the Golce continent. If it's from Penang, the most eastern island in the United Kingdom of the Southeast Islands, it's navigable. But it's an unknown sea area on the way, so we have to assume we can't replenish it. From the beginning of your voyage, if you restrict water and food, I know it's not an unreachable distance, but I hear there's a desert on the Golce continent, so you'll have trouble getting there."

Wonder and Seagal looked at the unfamiliar map and considered it enthusiastically.

"On this map, the northern hemisphere is blank with Pocan. In the south, the southeastern islands stretch from the old imperial continent to the southern hemisphere, scattered throughout the Great East, as well as the Golce continent..."

Shaw was concerned about the blank parts of the northern hemisphere, but first he switches his mind that we need a map of the Golce continent.

"It's summer vacation, and let's measure the eastern coastline of the Golce continent"

Wonder and Seagal were willing to ride, but Captain Regnum cautioned that King Aslan's permission had to be obtained.

If this prince looks away, he's going to fly off to the Golce continent. As if he were King Aslan, Captain Regnum does not take the watchful eye off Sands.

"Eh, if I had your father's permission, I'd be halfway past my summer vacation - oh, it would be quicker for a dragon than going back and forth to Reite by boat! Let's fly home to Reite."

No matter how many dragons it took, Captain Legnam rushed to stop Shaw.