[R-sig-Geo] Proj4string for NASA GPW v3 and Blue Marble world city light map?

[Eric Carr]

They also have this page:
http://sedac.ciesin.columbia.edu/data/set/gpw-v3-population-density/metadata

On Thu, May 7, 2015 at 11:11 AM, Shaun Walbridge <SWalbridge at esri.com>
wrote:

> The specific projection information is contained within the raster
> datasets you download, in the related ASCII, Bil or GRID file. The
> metadata you see on that page is just a human readable representation of
> the data coverage, not intended to directly map to the full spatial
> reference.
>
> --
> Shaun Walbridge
> GIS Developer
>
>
>
>
> On 5/7/15, 5:15 AM, "Ziyu Ma" <paul.ziyu.ma at gmail.com> wrote:
>
> >Dear all,
> >
> >I was working with a project concerning human population, using data from
> >the Population Density Grid, version 3.
> >
> >I have hard time understanding the spatial reference from this metadata
> >page:
> >
> >
> http://sedac.ciesin.columbia.edu/data/set/gpw-v3-population-density/metada
> >ta
> >
> >Can I translate this into a proj4string so that I can use it as a CRS in
> >R?
> >
> >Also, just out of curiosity, what it the spatial reference for NASA's Blue
> >Marble maps, like the famous world city light map? Can I also use a
> >proj4string to describe it?
> >
> >Thank you very much.
> >
> >Cheers,
> >Ma
> >
> >Ziyu Ma
> >PhD Student
> >Ecoinformatics & Biodiversity,
> >Department of Bioscience, Aarhus University
> >Ny Munkegade 114, DK-8000 Aarhus C, Denmark
> >
> >       [[alternative HTML version deleted]]
> >
> >_______________________________________________
> >R-sig-Geo mailing list
> >R-sig-Geo at r-project.org
> >https://stat.ethz.ch/mailman/listinfo/r-sig-geo
> >
>
> _______________________________________________
> R-sig-Geo mailing list
> R-sig-Geo at r-project.org
> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>

	[[alternative HTML version deleted]]