Generate generic plots of HarvestChoice 5-arc-minute spatial indicators

Method to plot HarvestChoice rasters with mutiple layout and symbology options. See examples below. Note that calling genPlot(...) is equivalent to calling the convenience method hcapi(..., format="plot").

genPlot(var, iso3 = "SSA", pal = character(0), layout = "default")

Arguments

var

character array of variable codes to plot

iso3

optional ISO3 country or region code(s)

pal

optional Brewer color palette used for plotting, e.g. "Blues"

layout

one of "default" or "thumbnail" to control legend and axes

Value

raster plot

Details

API call: generate 2 plots showing farming systems and 2012 population density for Ghana

$ curl http://hcapi.harvestchoice.org/ocpu/library/hcapi3/R/hcapi \ -d '{"var":["FS_2012_TX", "PD12_TOT"], "iso3":"GHA", "format":"plot"}' \ -X POST -H 'Content-Type:application/json' -- /ocpu/tmp/x03d5aa8e98/R/.val /ocpu/tmp/x03d5aa8e98/stdout /ocpu/tmp/x03d5aa8e98/source /ocpu/tmp/x03d5aa8e98/console /ocpu/tmp/x03d5aa8e98/info /ocpu/tmp/x03d5aa8e98/files/DESCRIPTION /ocpu/tmp/x03d5aa8e98/graphics/1 /ocpu/tmp/x03d5aa8e98/graphics/2

GET individual plots or all generated plots in a ZIP archive

$ wget http://hcapi.harvestchoice.org/ocpu/tmp/x03d5aa8e98/graphics/1/png?width=640 $ wget http://hcapi.harvestchoice.org/ocpu/tmp/x03d5aa8e98/graphics/last/svg $ wget http://hcapi.harvestchoice.org/ocpu/tmp/x03d5aa8e98/zip

See also

hcapi link\[classInt:classIntervals]classIntervals

Examples

# Generate standard raster plot of 2012 population density for Ethiopia
genPlot("PD12_TOT", iso3="ETH", pal="YlOrRd")
#> NULL

# Generate 2 raster plots for Ghana (thumbnail format with no legend)
genPlot(c("AEZ16_CLAS", "cass_h"), iso3="GHA", layout="thumbnail")
#> NULL

# Plot farming systems and yield variability across SSA
hcapi("FS_2012_TX", format="plot")
#> Warning: grid has empty column/rows in dimension 1
#> Warning: grid has empty column/rows in dimension 2
#> NULL
hcapi("yield_l_cv", format="plot")
#> Warning: grid has empty column/rows in dimension 1
#> Warning: grid has empty column/rows in dimension 2
#> NULL