sh3 grid protractor

don1reed · 04-11-06, 08:40 PM

I guess we have the Devs to blame for the 'distorted' Mercator Projection of the F5 screen, because on a real KM chart of the Nord Atlantischer ozean Nr.1870 G1, BF25 as used in your example is really a square and not a rectangle, and would have been a lot easier to divide into the KM planquadrats.

On a real chart, the grids only begin to deform from square to rectangle about 55Â°N, and then they get longer in vertical aspect rather than horizontal due to the narrowing of Longitudes at higher latitudes.

I've resolved to believe the F5 screen is just 'eye candy' and hardly usable to actually navigate upon. When I've tried to sail Great Circle (GC) courses, or Rhumb line (running a real navigation program in the background) using actual Geo coordinates as start and finish, the azimuths sailed come no where near the destinations.

I'm not a computer guy, but I suspect it's caused by the same reason Letterbox movies have margins above and below the movie. (x, y ratio)

With luck, maybe the devs of SHIV will use a navigation program as their base for a chart screen.

04-11-06, 08:40 PM	#2
don1reed Ace of the Deep Join Date: Dec 2004 Location: Valhalla: Silent Generation Posts: 1,149 Downloads: 910 Uploads: 0	I guess we have the Devs to blame for the 'distorted' Mercator Projection of the F5 screen, because on a real KM chart of the Nord Atlantischer ozean Nr.1870 G1, BF25 as used in your example is really a square and not a rectangle, and would have been a lot easier to divide into the KM planquadrats. On a real chart, the grids only begin to deform from square to rectangle about 55Â°N, and then they get longer in vertical aspect rather than horizontal due to the narrowing of Longitudes at higher latitudes. I've resolved to believe the F5 screen is just 'eye candy' and hardly usable to actually navigate upon. When I've tried to sail Great Circle (GC) courses, or Rhumb line (running a real navigation program in the background) using actual Geo coordinates as start and finish, the azimuths sailed come no where near the destinations. I'm not a computer guy, but I suspect it's caused by the same reason Letterbox movies have margins above and below the movie. (x, y ratio) With luck, maybe the devs of SHIV will use a navigation program as their base for a chart screen. __________________ [SIGPIC][/SIGPIC] During times of universal deceit, telling the truth becomes a revolutionary act. ~ George Orwell