auk_bbox: Filter the eBird data by spatial bounding box

Description Usage Arguments Details Value See Also Examples

View source: R/auk-bbox.r

Description

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 defined, auk_filter() should be used to call AWK and perform the filtering.

Usage

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auk_bbox(x, bbox)

Arguments

x

auk_ebd or auk_sampling object; reference to file created by auk_ebd() or auk_sampling().

bbox

numeric; spatial bounding box expressed as the range of latitudes and longitudes in decimal degrees: c(lng_min, lat_min, lng_max, lat_max). Note that longitudes in the Western Hemisphere and latitudes sound of the equator should be given as negative numbers.

Details

This function can also work with on an auk_sampling object if the user only wishes to filter the sampling event data.

Value

An auk_ebd object.

See Also

Other filter: auk_bcr, auk_breeding, auk_complete, auk_country, auk_date, auk_distance, auk_duration, auk_extent, auk_filter, auk_last_edited, auk_project, auk_protocol, auk_species, auk_state, auk_time

Examples

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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))

CornellLabofOrnithology/auk documentation built on Nov. 9, 2018, 8:44 p.m.