Define a filter for the eBird Basic Dataset (EBD) based on spatial bounding
box. This function only defines the filter and, once all filters have been
auk_filter() should be used to call AWK and perform the filtering.
numeric; spatial bounding box expressed as the range
of latitudes and longitudes in decimal degrees:
This function can also work with on an
auk_sampling object if the
user only wishes to filter the sampling event data.
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# fliter to locations roughly in the Pacific Northwest system.file("extdata/ebd-sample.txt", package = "auk") %>% auk_ebd() %>% auk_bbox(bbox = c(-125, 37, -120, 52)) # alternatively, without pipes ebd <- auk_ebd(system.file("extdata/ebd-sample.txt", package = "auk")) auk_bbox(ebd, bbox = c(-125, 37, -120, 52))
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