[R-sig-Geo] R-sig-Geo Digest, Vol 161, Issue 7

[Hollister, Jeff]

Mike mentioned https://github.com/jhollist/elevatr and it is still in development, but is very close to being submitted to CRAN so for the time being the development version shouldn't cause to much queasiness!


It access both point elevations from a data frame of xy's or a SpatialPoints/SpatialPointsDataFrame or a raster DEM from data frame/sp object bounding box.  The primary source is the Mapzen elevation/terrain tiles (<https://tile.mapzen.com/mapzen/terrain/v1/>https://mapzen.com/documentation/terrain-tiles/ and https://mapzen.com/documentation/elevation/elevation-service/).


Cheers,

Jeff



>Message: 7
>Date: Wed, 11 Jan 2017 00:51:59 +0000
>From: Michael Sumner <mdsumner at gmail.com>
>To: Miluji Sb <milujisb at gmail.com>,     R-sig-geo mailing list
>       <r-sig-geo at r-project.org>
>Subject: Re: [R-sig-Geo] Elevation data
>Message-ID:
 >       <CAAcGz9-EokqsPzyorVjvQzmtUmOzx4Y-L8W52DR9HDdbSqRwgQ at mail.gmail.com>
>Content-Type: text/plain; charset="UTF-8"
>
>Passed through? Maybe you want ?raster::extract
>
>There are a few versions of global elevation on CRAN, necessarily at low
>resolution but no overall summary afaik (someone should do this :).
>
>This is one: https://cloud.r-project.org/web/packages/GEOmap/index.html
>
>If you have the stomach for development versions of packages see elevatr:
>https://github.com/jhollist/elevatr<https://github.com/jhollist/elevatr>
>
>I tend to have the high-resolution files at hand because we use them
>constantly, the main ones are Gebco14/Gebco08 and Etopo1/Etopo2 (from
>Smith-Sandwell).
>
>There's a reasonable overview here, you probably should find a specific
>data set that is at the resolution you are after already, and you can cite
>its derivation for your work:
>
>http://vterrain.org/Elevation/global.html<http://vterrain.org/Elevation/global.html>
>
>Cheers, Mike.
>
>On Wed, 11 Jan 2017 at 10:20 Miluji Sb <milujisb at gmail.com> wrote:>
>
>> Dear all.
>>
>> Is there a way to download global elevation data at the 1? x 1? resolution
>> in R using a given set of coordinates?
>>
>> I know about the getData() function but can many coordinates be passed
>> through this? Thanks!
>>
>> Sincerely,
>>
>> Milu
>>
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> Dr. Michael Sumner
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> Australian Antarctic Division
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