[Sumeragi]

Ruler: Sumeragi
Nation: Kyokujitsu Teikoku
Link: http://www.cybernati...ation_ID=236059



I currently have a 1,363.734 mile diameter SoI.


Here is my IG map:




Here is a map using an online site.





As you can see, my IG map seems inaccurate, given that 1,363.734 miles is 19.7 degrees wide. Given that Guam is slightly less than 13.5 degrees north, I should be able to cover Guam and most of New Guinea. However, the IG makes the sphere smaller.



I believe that there could be a bug here. Could the admin look into this?

[Chairman Cao]

The display area is capped at something like 500mi radius, can't remember where this is stated but it's intentional.

[Count Rupert]

Chairman Cao, on Oct 29 2008, 06:52 AM, said:

The display area is capped at something like 500mi radius, can't remember where this is stated but it's intentional.

The display is capped at 5000 miles. Above 5000 miles your nation area is no longer displayed on the map.

This post has been edited by Count Rupert: 29 October 2008 - 02:27 PM

[Chairman Cao]

Count Rupert, on Oct 29 2008, 08:23 PM, said:

The display is capped at 5000 miles. Above 5000 miles your nation area is no longer displayed on the map.

Good point, it's not actually hitting the cap.

I realise the actual problem now - looking again at the nation on the map and comparing it with the scale (500mi is displayed), the radius is clearly around 600-700mi. So there is no bug, rather Sumeragi is confusing the radius with the diameter; a radius of 680mi gives a diameter of 1360 as it should be.


PS: In fact that's not area either, an area of 1363 square miles would require a radius of 138mi, but that's another issue...

[admin]

Also, your nation is close to the international date line. Google maps get a little goofy when you try to draw circles over there.

[Sumeragi]

Chairman Cao, on Oct 30 2008, 06:02 AM, said:

I realise the actual problem now - looking again at the nation on the map and comparing it with the scale (500mi is displayed), the radius is clearly around 600-700mi. So there is no bug, rather Sumeragi is confusing the radius with the diameter; a radius of 680mi gives a diameter of 1360 as it should be.

I'm not confusing anything: The diameter should be 1360 miles, but it's around 600~800 miles on the nation map

admin, on Oct 30 2008, 06:14 AM, said:

Also, your nation is close to the international date line. Google maps get a little goofy when you try to draw circles over there.

A nation that actually crosses the international date line (Example: Imperial Wellington) has the correct sphere of influence (5500 miles).

I'm still more than 20 degrees west of the IDT, anyway.

This post has been edited by Sumeragi: 29 October 2008 - 05:44 PM

[Chairman Cao]

Hmm I think you're measuring north-south while I'm measuring west-east. If you look at the first image you posted, the 500mi scale which is accurate at the centre of the image, is clearly less than the radius (use a bit of string or paper), so the diameter is over 1000mi, I'd say 1200+ and probably 1360 at it should be.

However looking north-south I can see your point, while the scale on the map should not be accurate here, you're right that Guam and more of Papua New Guinea should be covered, so the N-S diameter drawn is clearly well short of what it should be.

So the problem appears to be that google maps isn't using a fixed radius when drawing. The example you give of Imperial Wellington is NOT drawing correctly north-south either - from Norfolk island the radius should reach well beyond the equator whether you take his total land of 5500mi or even the smaller value of 4795mi displayed on his map. So I imagine it could be the IDL screwing things up as Admin says, though I haven't confirmed that other large nations not crossing it work properly - perhaps all nations are off

[Lord Emares]

Chairman Cao, on Oct 30 2008, 01:13 PM, said:

Hmm I think you're measuring north-south while I'm measuring west-east. If you look at the first image you posted, the 500mi scale which is accurate at the centre of the image, is clearly less than the radius (use a bit of string or paper), so the diameter is over 1000mi, I'd say 1200+ and probably 1360 at it should be.

However looking north-south I can see your point, while the scale on the map should not be accurate here, you're right that Guam and more of Papua New Guinea should be covered, so the N-S diameter drawn is clearly well short of what it should be.

So the problem appears to be that google maps isn't using a fixed radius when drawing. The example you give of Imperial Wellington is NOT drawing correctly north-south either - from Norfolk island the radius should reach well beyond the equator whether you take his total land of 5500mi or even the smaller value of 4795mi displayed on his map. So I imagine it could be the IDL screwing things up as Admin says, though I haven't confirmed that other large nations not crossing it work properly - perhaps all nations are off

Or its more likely because 1300 miles E-W =/= 1300 miles N-S when drawn on a map...most maps have to stretch the map in the E-W direction significantly if they want it to be viewed as a flat surface (there is one exception to this but it involves the map not being continuous at points) and if google maps measures radius along the E-W axis then that would explain the discrepancy.

This post has been edited by Lord Emares: 30 October 2008 - 07:04 PM

[Sumeragi]

So, all in all, can we safely say that the map itself is screwed, and I should use exactly calculations when RPing?

[Chairman Cao]

Lord Emares, on Oct 31 2008, 01:03 AM, said:

Or its more likely because 1300 miles E-W =/= 1300 miles N-S when drawn on a map...most maps have to stretch the map in the E-W direction significantly if they want it to be viewed as a flat surface (there is one exception to this but it involves the map not being continuous at points) and if google maps measures radius along the E-W axis then that would explain the discrepancy.

I was thinking that too, but looking at imperial wellington's map which takes up a large area, it is showing the kind of egg shape which you'd expect when a circle on a sphere is distorted in this way into a flat surface. So it's partially accounting for it, but not properly it would seem.

We can certainly all agree it's not right though.

This post has been edited by Chairman Cao: 31 October 2008 - 04:56 AM