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Square vs. honeycomb raster grids
5 messages · Roger Bivand, Rafael Pereira, Bacou, Melanie
On Fri, 1 Sep 2017, Bacou, Melanie wrote:
I am wondering if current R raster operations (e.g. `extract()`, `resample()`, distance(), etc.) can be modified to work with honeycomb (hexagonal) grids instead of simple square grids? This is driven by e.g. work at Uberhttps://www.slideshare.net/stonse/ml-and-data-science-at-uber-gitpro-talk-2 017, and other articles http://strimas.com/spatial/hexagonal-grids/. I'm being asked to evaluate the pros/cons of using different tessellations, and wondering what's the extent of R's support for non square grids.
Please also consider taking this up with: https://github.com/r-spatial/stars where it is very relevant. See also the dggridR package: https://cran.r-project.org/web/packages/dggridR/index.html Please report back on this - it deserves to be advanced actively. Roger
Many thanks, --Mel.
Roger Bivand Department of Economics, Norwegian School of Economics, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; e-mail: Roger.Bivand at nhh.no Editor-in-Chief of The R Journal, https://journal.r-project.org/index.html http://orcid.org/0000-0003-2392-6140 https://scholar.google.no/citations?user=AWeghB0AAAAJ&hl=en
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Melanie, if you're also interested, this paper brings a good summary of the pros and cons of three regular tessellations: hexagons, squares and triangles. http://www.sciencedirect.com/science/article/pii/S0304380007001949 best wishes, Rafael H M Pereira
On Fri, Sep 1, 2017 at 11:42 AM, Bacou, Melanie <mel at mbacou.com> wrote:
On 09/01/2017 03:53 AM, Roger Bivand wrote: On Fri, 1 Sep 2017, Bacou, Melanie wrote: I am wondering if current R raster operations (e.g. `extract()`, `resample()`, distance(), etc.) can be modified to work with honeycomb (hexagonal) grids instead of simple square grids? This is driven by e.g. work at Uber https://www.slideshare.net/stonse/ml-and-data-science-at- uber-gitpro-talk-2 017, and other articles http://strimas.com/spatial/hexagonal-grids/. I'm being asked to evaluate the pros/cons of using different tessellations, and wondering what's the extent of R's support for non square grids. Please also consider taking this up with: https://github.com/r-spatial/stars where it is very relevant. See also the dggridR package: https://cran.r-project.org/web/packages/dggridR/index.html Please report back on this - it deserves to be advanced actively. Roger Roger, thanks did that. Reviewing Richard Barnes' package now. --Mel. Many thanks, --Mel.
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