sharkcano {tabularaster}

Sharkcano, the shark and the volcano.

Description

This is just a free image off the internet. The image was read in and all non-essential items dropped. The dimensions in raster::raster terms is stored in attr(sharkcano, "rasterdim").

Format

A data frame with 117843 rows and 2 variables:

cell_

integer, cell index

byte

integer, byte value of shark image pixels

These are cell values on a grid that is 648x958.

References

This is the small version from here, see script in data-raw/sharkcano.r http://www.freestockphotos.biz/stockphoto/16214 Thanks to @jennybc for pointers on finding free stuff: https://github.com/jennybc/free-photos

Examples

library(raster)
rd <- attr(sharkcano, "rasterdim")
rastershark <- raster(matrix(NA_integer_, rd[1], rd[2]))
rastershark[sharkcano$cell_] <- sharkcano$byte  ## byte, heh
## I present to you, Sharkcano!  (Just wait for the 3D version, Quadshark).
plot(rastercano)
contour(rastershark, add = TRUE, labels = FALSE)
plot(rastershark, col = "black")
## another way
plot(rastercano)
points(xyFromCell(rastershark, sharkcano$cell_), pch = ".")