Re-Asessing Real Navigation...

Fader_Berg · 10-25-21, 09:09 AM

While working with patSH3r and the positioning system within it. I somehow (can't remember how today) came up with a pretty good estimate of the SH3 world globe median radius. The source code says that it's 6875493 meters (while it's ~6371000 IRL).

Pisces · 10-25-21, 10:11 AM

Well, SH3 (and SH4) hold the rule that 1 degree is 120 kilometer. In both longitude and latitude. So by that rule the circumference is 43200 km. You can measure that with the line tool on the map. The markings on the edges of the map indicate where the exact number roll over. Then by the circumference rule, dividing by 2*pi the radius becomes 6875.49.... kilometer.

And you can prove that by taking any easily distinguishable point on the SH3 map, measure the distances to the equator and prime meridian, divide by 120km and you get the exact place in decimal longitude and latitude that you can verify in Google Earth, or whatever deeply zoomed in map.

The mission editor gives exact coordinates of the cursor. So that is easier to find the coordinate.

CaliEs · 11-02-21, 02:13 PM

Initial starting position of U-boat in SH3-mission "Naval Acadamy / Navigation" is
Long=1165300.00
Lat =6632750.00
Aro Sund

To convert to real lat/long:
E 009° 43' 15.0'' = 09° 43.268' = 09.721133333333333° = 1165300 / 120000

N 055° 16' 22.5'' = 55° 16.375' = 55.272916666666667° = 6632750 / 120000

10-25-21, 09:09 AM	#1
Fader_Berg 中国水兵 Join Date: Jun 2009 Location: Uppland, Sweden Posts: 278 Downloads: 48 Uploads: 0	While working with patSH3r and the positioning system within it. I somehow (can't remember how today) came up with a pretty good estimate of the SH3 world globe median radius. The source code says that it's 6875493 meters (while it's ~6371000 IRL). __________________ patSH3r-developer, (https://fb.tuxxor.net) Type II junkie

10-25-21, 10:11 AM	#2
Pisces Silent Hunter Join Date: Dec 2004 Location: AN9771 Posts: 4,904 Downloads: 304 Uploads: 0	Well, SH3 (and SH4) hold the rule that 1 degree is 120 kilometer. In both longitude and latitude. So by that rule the circumference is 43200 km. You can measure that with the line tool on the map. The markings on the edges of the map indicate where the exact number roll over. Then by the circumference rule, dividing by 2*pi the radius becomes 6875.49.... kilometer. And you can prove that by taking any easily distinguishable point on the SH3 map, measure the distances to the equator and prime meridian, divide by 120km and you get the exact place in decimal longitude and latitude that you can verify in Google Earth, or whatever deeply zoomed in map. The mission editor gives exact coordinates of the cursor. So that is easier to find the coordinate. __________________ My site downloads: https://ricojansen.nl/downloads

11-02-21, 02:13 PM	#3
CaliEs Loader Join Date: Oct 2011 Posts: 89 Downloads: 27 Uploads: 0	Initial starting position of U-boat in SH3-mission "Naval Acadamy / Navigation" is Long=1165300.00 Lat =6632750.00 Aro Sund To convert to real lat/long: E 009° 43' 15.0'' = 09° 43.268' = 09.721133333333333° = 1165300 / 120000 N 055° 16' 22.5'' = 55° 16.375' = 55.272916666666667° = 6632750 / 120000 __________________ Dietrich von Carlewitz, 2nd Lt. U-29