RE: [Xplanet-development] drawing an arc
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RE: [Xplanet-development] drawing an arc
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From: Michael D. <Mic...@co...> - 2004-01-06 10:09:30
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Re the arc file Isn't it the way, you give up and then later have a look at something = and you get fresh ideas. If you reverse the first set, then it is = rendered properly, i.e. you have to end at 90 not start at 90 so top line should read=20 75,180,90,180 color=3Dwhite Mike -----Original Message----- From: Michael Dear=20 Sent: 06 January 2004 9:52 AM To: Hari Nair; xpl...@li... Subject: RE: [Xplanet-development] drawing an arc The International Date line (IDL) doesn't actually have any fixed = points. However by convention the IDL does follow the hydrographical = departments of either the British or US Navy, to plot the line. So = baring this in mind you can use the following. I do have a arc file for the IDL but for some reason xplanet doesn't = like the rendering the first set. If someone can fix it then I would = use it again. (attached) Mike Source MS Encarta World Atlas (1998) +90=B0, 180=B0 +75=B0, 180=B0 +68=B0, -169=B0 +65=B0 30', -169=B0 +53=B0, +170=B0 +48=B0, 180=B0 -5=B0, 180=B0 -14=B0 45', -172=B0 30' -44=B0 30', -172=B0 30' -51=B0, 180=B0 -90=B0, 180=B0 Or National Geographic Atlas of the World (6th Ed. 1992) +90=B0, 180=B0 +75=B0, 180=B0 +72=B0, -169=B0 +65=B0 30', -169=B0 +64=B0, -172=B0 +50=B0 30', +167=B0 +48=B0, 180=B0 (+2=BA, 180=BA), (0=BA, -179=BA), (0=BA, -165=BA), (-3=BA, -165=BA), = (-3=BA, -160=BA), (+2=BA, -160=BA), (+2=BA, -162=BA),=20 (+5=BA, -162=BA), (+5=BA, -154=BA), (-8=BA, -151=BA), (-12=BA, -151=BA), = (-12=BA, -157=BA), (-9=BA, -157=BA), (-9=BA, -178=BA) -5=B0, 180=B0 -15=B0, -172=B0 30' -44=B0 45', -172=B0 30' -51=B0 30', 180=B0 -90=B0, 180=B0 The Co-ords in brackets are eastern boundaries of the republic of = Kiribati which is bisected by the IDL and so decided not to have a 4 day = week but move the IDL unilaterally. Some say when they did it in 1995 = that its a cynical ploy to be the first to see in 2000. Still some links to look at http://aa.usno.navy.mil/faq/docs/international_date.html To pull up some tables. http://www.phys.uu.nl/~vgent/idl/idl.htm#The%20date%20line%20before%20and= %20after%20the%20International -----Original Message----- From: Hari Nair [mailto:ha...@al...] Sent: 06 January 2004 12:11 AM To: xpl...@li... Subject: Re: [Xplanet-development] drawing an arc I haven't tried this, but why not make a file of 1-degree segments like this: 90 180 89 180 89 180 88 180 . . . -88 180 -89 180 -89 180 -90 180 If the arcs aren't straight enough, use 1/2 degree or smaller intervals. I think the arc file should handle crossing the 180 longitude meridian. If you come up with an arc file for the date line with the proper zigs and zags, I'd appreciate a copy. Thanks, Hari ------------------------------------------------------- This SF.net email is sponsored by: IBM Linux Tutorials. Become an expert in LINUX or just sharpen your skills. Sign up for = IBM's Free Linux Tutorials. Learn everything from the bash shell to sys = admin. Click now! http://ads.osdn.com/?ad_id=3D1278&alloc_id=3D3371&op=3Dclick _______________________________________________ Xplanet-development mailing list Xpl...@li... https://lists.sourceforge.net/lists/listinfo/xplanet-development Please Visit our Website at: http://www.collegiate.co.uk =20 --------- Disclaimer --------- This e-mail is intended only for the addressee named above. As this = e-mail may contain confidential or privileged information if you are not the named = addressee you must not read, use, or disseminate any part of the contents but please telephone us on = (020) 7459 3456. =20 Internet communications are not secure and therefore the company does = not accept legal responsibility for the contents of this message. 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As this = e-mail may contain confidential or privileged information if you are not the named = addressee you must not read, use, or disseminate any part of the contents but please telephone us on = (020) 7459 3456. =20 Internet communications are not secure and therefore the company does = not accept legal responsibility for the contents of this message. The addressee should = carry out a virus check before opening any attachment as we do not accept liability for any = damage sustained as a result of any software viruses. Collegiate Group:=20 Registered Offices: Roman Wall House, 1 Crutched Friars, London EC3N = 2NB. Collegiate Management Services Ltd Registered in England No. 2065041 Tel: 020 7459 3456 Fax: 020 7459 3453 Collegiate Insurance Brokers Ltd Registered in England No. 2802355 Tel: 020 7459 3459 Fax: 020 7459 3454 A member of the General Insurance Standards Council Mail From: Pugwash.collegiate.co.uk 6/1/2004 |
