From koolish@bbn.com Mon Sep 13 12:44:30 1993 From: koolish@bbn.com (Dick Koolish) Newsgroups: sci.astro Subject: Re: Star map equations Date: 13 Sep 1993 14:11:33 GMT NNTP-Posting-Host: bbn.com peter.larson@f635.n713.z3.fido.zeta.org.au (Peter Larson) writes: >Does anyone know the equations for converting RA/Dec or Lat/Long values >into a conic projection? I have derived my own, but they are very >complex, so I am assuming that there are simpler equations available. >Also, I am interested in any other form of projection formulas that are >commonly used. There is a whole projection library available. It's at: charon.er.usgs.gov in the directory: /pub and is in the file: PROJ.4.1.3.tar.Z From dwells@fits.cv.nrao.edu Mon Sep 13 13:49:07 1993 Newsgroups: sci.astro From: dwells@fits.cv.nrao.edu (Don Wells) Subject: Re: Star map equations In-Reply-To: koolish@bbn.com's message of 13 Sep 1993 14: 11:33 GMT Organization: nrao Date: Mon, 13 Sep 1993 18:46:19 GMT In article koolish@bbn.com (Dick Koolish) writes: DK> peter.larson@f635.n713.z3.fido.zeta.org.au (Peter Larson) writes: DK> DK> >Does anyone know the equations for converting RA/Dec or Lat/Long values DK> >into a conic projection? I have derived my own, but they are very DK> >complex, so I am assuming that there are simpler equations available. DK> DK> >Also, I am interested in any other form of projection formulas that are DK> >commonly used. DK> There is a whole projection library available. It's at: DK> charon.er.usgs.gov in the directory: /pub and is in the file: DK> PROJ.4.1.3.tar.Z Another interesting reference, one particularly adapted to astronomical needs, is the file fits.cv.nrao.edu: /fits/documents/wcs/ wcs.ps.all.Z -- Donald C. Wells Associate Scientist dwells@nrao.edu National Radio Astronomy Observatory +1-804-296-0277 520 Edgemont Road Fax= +1-804-296-0278 Charlottesville, Virginia 22903-2475 USA 78:31.1W, 38:02.2N