auk (version 0.8.0)

auk_bbox: Filter the eBird data by spatial bounding box

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

auk_bbox(x, bbox)

Value

An auk_ebd object.

Arguments

x

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

bbox

numeric or sf or Raster* object; 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. Alternatively, a spatial object from either the sf or raster packages can be provided and the bounding box will be extracted from this object.

Details

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

See Also

Other filter: auk_bcr(), auk_breeding(), auk_complete(), auk_country(), auk_county(), auk_date(), auk_distance(), auk_duration(), auk_exotic(), auk_extent(), auk_filter(), auk_last_edited(), auk_observer(), auk_project(), auk_protocol(), auk_species(), auk_state(), auk_time(), auk_year()

Examples

# 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))