hcapi3 3.7

Summarize HarvestChoice indicators over WKT geometri(es)

Usage

getLayerWKT(var, wkt, ...)

Arguments

var
character array of variable names to summarize (all types are accepted)
wkt
unprojected (epsg:4326) WKT representation of a spatial object (points, multipoints, or polygons)
...
other arguments passed to getLayer (e.g. by, collapse, format)

Value

a data.table (or other format) of var indicators summarized across wkt geometri(es)

Description

This function intersects (extracts) any spatial object (WKT point, multipoints, polygons or multipolygons) with HarvestChoice 5-arc-minute grid and returns an array of intersected gridcell IDs (CELL5M codes) to pass along as argument to getLayer.

Examples

# Mean harvested maize area summarized across a custom polygon
x <- getLayerWKT("maiz_h", wkt="POLYGON((-16.35819663578485006 15.36599264077935345,
-15.42501860768386379 15.69472580976947462, -15.11749403024149174 14.83577785208561117,
-16.13550642453347805 14.68731771125136376, -16.35819663578485006 15.36599264077935345))")
x



   ISO3 maiz_h
1:  SEN    330