R: Text xyz to multiple raster

Question

I have a comma delimited text files with the header names

lat,long,z1,z2,z3,z4,z5

These columns contain the lat, long and multiple height values(z1, z2,z3, z4). The lat and long data is spaced at an equal interval of 5 meters.

What is the most efficient way to convert the data into individual rasters or an R raster stack each having the z values, given the projection information is UTM, zone 18.

The sample data can be accessed here.

or this question http://stackoverflow.com/questions/19627344/how-to-create-a-raster-from-a-data-frame-in-r — user5219763, Mar 11 '16 at 19:08

score 3 · Accepted Answer · answered Mar 12 '16 at 20:56

3

You can do this:

x <- data.frame(lon=1:11, lat=5:15, z1=runif(11), z2=11:1)
library(raster)
b <- rasterFromXYZ(x)

#> b
#class       : RasterBrick 
#dimensions  : 11, 11, 121, 2  (nrow, ncol, ncell, nlayers)
#resolution  : 1, 1  (x, y)
#extent      : 0.5, 11.5, 4.5, 15.5  (xmin, xmax, ymin, ymax)
#coord. ref. : NA 
#data source : in memory
#names       :         z1,         z2 
#min values  : 0.08495835, 1.00000000

answered Mar 12 '16 at 20:56

Robert Hijmans

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Thank you RobertH, I love raster package. I was not aware of "rasterFromXYZ" function. – Arihant Mar 12 '16 at 21:09

R: Text xyz to multiple raster

1 Answers1