06_canvas: Project's canvas

Description

The canvas is a regular grid of a given resolution. Each range map is overlayed onto the canvas and the results saved to project.

Usage

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Arguments

con

An sqlite connection pointing to a valid rangeMapper project.

Value

canvas.fetch Returns a SpatialPixelsDataFrame object.

Note

The method canvasSave() fails if grid.size was not set and if the canvas was already constructed for the given project.

Author(s)

Mihai Valcu valcu@orn.mpg.de

References

Valcu, M., Dale, J. and Kempenaers, B. (2012) rangeMapper: A platform for the study of macroecology of life history traits. 21(9). (DOI: 10.1111/j.1466-8238.2011.00739.x)

See Also

rangeMap.save.
gridSize.save

Examples

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require(rangeMapper)
wd = tempdir()
dbcon = rangeMap.start(file = "test.sqlite", overwrite = TRUE, dir = wd)
global.bbox.save(con = dbcon)
gridSize.save(dbcon, gridSize = 2)
canvas.save(dbcon)
cnv = canvas.fetch(dbcon)
summary(cnv)
plot(cnv, col = 'grey', axes = TRUE)

Questions? Problems? Suggestions? or email at ian@mutexlabs.com.

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