Sapporo, Japan; Garapan, Saipan; Agana, Guam; Port Moresby, Papua New Guinea; Cairns, Australia; and Melbourne, Australia are all fairly close to 145 east.
There is no city located there. That point is far at sea in the western Pacific,
about 350 miles southeast of Tokyo, Japan.
Those coordinates are in the Coral Sea between Papua New Guinea and the northern tip of Queensland, Australia. The nearest city would be Port Moresby, about 150 miles away.
One obvious error is the fact that any "east" number is a longitude, and any "south" number is a latitude.
Since the earth is a sphere (ball), you can reach any place on earth by traveling in either direction from any other place. To reach any west longitude from the Prime Meridian, heading west is the shorter way. To reach any east longitude from the Prime Meridian, heading east is the shorter way.
All meridians of longitude have the same nominal length. However, at any given longitude, the meridian of 180° East longitude is the one farthest from the Prime Meridian. Perhaps that's what you had in mind.
Any point whose longitude is "120 degrees E" is 120 degrees to the east of the Prime Meridian.
There is no difference between 180 degrees east and 180 degrees west longitude because the Earth is divided into the eastern and western hemispheres, each having 180 degrees of longitude each. Therefore, 180 degrees east and west longitude means the same thing --- 180 degrees longitude.
That's near Limulunga in western Zambia. Not really any cities there.
That's in the middle of the Indian Ocean, near the Maldives. Not really any cities there.
One obvious error is the fact that any "east" number is a longitude, and any "south" number is a latitude.
Since the earth is a sphere (ball), you can reach any place on earth by traveling in either direction from any other place. To reach any west longitude from the Prime Meridian, heading west is the shorter way. To reach any east longitude from the Prime Meridian, heading east is the shorter way.
All meridians of longitude have the same nominal length. However, at any given longitude, the meridian of 180° East longitude is the one farthest from the Prime Meridian. Perhaps that's what you had in mind.
That's near Zeget in Liberia. Not really any cities there.
Any point whose longitude is "120 degrees E" is 120 degrees to the east of the Prime Meridian.
Every "line" of constant longitude joins the north and south poles, so the lines "run" north and south. Longitude numbers range from zero to 180 degrees east and from zero 180 degrees west. So all together, there are 360 degrees of longitude, which is exactly what you need if you want to use longitude to measure any place all around the Earth.
That point is not in any country. It's in the Philippine Sea, about 330 miles east-northeast of Camiguin Island.
There is no difference between 180 degrees east and 180 degrees west longitude because the Earth is divided into the eastern and western hemispheres, each having 180 degrees of longitude each. Therefore, 180 degrees east and west longitude means the same thing --- 180 degrees longitude.
The Greenwich meridian is the most notable. ===================================== Any longitude that's less than 66 degrees west, or between roughly 124-130 degrees west, or less than 172 degrees east, doesn't cross any US territory.
Turkey spans nearly 18.5 degrees of longitude, between about 26°24' east at Canakkale to 44°46' east at the point where Turkey, Iran, and Iraq meet. On your map, you're welcome to subdivide that span into as many or as few intervals as you're comfortable with, and to draw the lines to indicate the various meridians. Keep in mind that a greater number of lines permits more precise estimates of longitude, but they do tend to cover up stuff on the map. But the choice is entirely up to the owner of the map.