You will need to coerce your data into a "spatial" kind, as implemented in `sp` or as of late, `sf` packages. You might want to give the vignettes a whirl before you proceed. Roughly, you will have to coerce the data to Spatial* (you could go for a point, raster or grid type, I think) and also specify the projection. Once you have that, plotting should be handled by packages.
Here are a few quick links that might come handy: https://cran.r-project.org/web/views/Spatial.html http://www.datacarpentry.org/R-spatial-raster-vector-lesson/10-vector-csv-to-shapefile-in-r/ Cheers, Roman On Mon, Jan 15, 2018 at 11:22 PM, lily li <chocol...@gmail.com> wrote: > Hi users, > > I have no clear clue about plotting spatial data. For example, I just have > a table with attribute values of each grid cell, such as elevation. Then I > have coordinates of the upper left corner in UTM, the number of rows and > columns, and grid cell size. How to create spatial plot of elevations for > the grid cells, in color ramp? Should I create a spatial grid layer with > all the polygons first? Thanks. > > -- > -- > You received this message because you are subscribed to the ggplot2 > mailing list. > Please provide a reproducible example: https://github.com/hadley/ > devtools/wiki/Reproducibility > > To post: email ggpl...@googlegroups.com > To unsubscribe: email ggplot2+unsubscr...@googlegroups.com > More options: http://groups.google.com/group/ggplot2 > > --- > You received this message because you are subscribed to the Google Groups > "ggplot2" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to ggplot2+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- In God we trust, all others bring data. [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.