Hello Alex, you took the question too seriously, "Non Earth" is MapInfo parlance for "I dunna 'but it" or "My user and I do not care about CRS". Nothing to do with the moon and the stars, sometimes a space which is not georeferenced (your cellar and bottles, a library with books, etc.). Sometimes this is just related to "paper coordinates" (pixels are not so bad as a unit) or unknown CRSs (better nothing than wrong). Anyway the solution could be from very easy to very difficult. Frequently the user has a way to recognize the right CRS or infer it by time/place/numbers or simply reading what's written on the original (I know, reading the map is more than reading the words in it, but this is a good start...), sometimes it's just a matter of affine transformations (there is a plugin for this, sometimes the map has to be georeferenced again. In these cases there is a plugin to georeference vectors (MapBender, if I remember, I write on my mobile). If Priscilla tells us more about what type of non-earth-projection are these, we could be more helpful. c
On Tue, 30 Sep 2014 09:06:40 -0700 Alex Mandel wrote: > From: Alex Mandel <[email protected]> > To: Priscilla Maisie <[email protected]>, > [email protected] > Subject: Re: [Qgis-user] Non Earth projection > Message-ID: <[email protected]> > Content-Type: text/plain; charset=windows-1252 > > On 09/30/2014 03:10 AM, Priscilla Maisie wrote: > > Hi, > > I need to work in a non earth map projection system. Can't locate the > > option on qgis. Is there a way I can create this? > > > > Regards, > > Priscilla > > > > Yes you can create your own projection in Settings->Custom CRS. > You'll need to create your own proj4 compatible string. Comparing a few > similar projections should help you figure out what you need. > > Note in recent versions of QGIS if you look in the Projection on the Fly > dialog, there are several Mars projections and Coordinate systems. > > Need more help, please provide more information about the planet > size/shape and type of projection. > > Other references, http://epsg.io and http://spatialreference.org > > Thanks, > Alex
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