comp.lang.idl-pvwave archive - RDF feed
type: channel
description: Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
items: Re: map projection / poly fill bug

Re: map projection / poly fill bug
type: item
description: In article <3n3clr$ng3@post.gsfc.nasa.gov> "Ian E. Sprod" <Ian.Sprod@gsfc.nasa.gov> writes: > I have found a bug in IDL when plotting polygons onto > a map projection. If the polygon is on the edge of the > map then streaks of color are drawn from the edge of > the map to the edge of the screen Clearly the coordinate > mapping has gone awry in this case. > Anyone else hit this problem? > > Any answers? RSI? > Yes, We are here. Indeed this is a problem. IDL4.0 gets around this polyfill limitation with a horizon clipping algorithm added to map_continents (maps in IDL4 include continents as polygons). Steve Penton stevep@rsinc.com
creator: stevep
date: 1995-04-19T07:00:00-00:00