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Converts a string of latitudes and longitudes into a square matrix to be passed as a bbox argument (to extract_osm_objects, osm_basemap, or make_osm_map).
bbox
extract_osm_objects
osm_basemap
make_osm_map
get_bbox(latlon)
A vector of (longitude, latitude, longitude, latitude) values.
A 2-by-2 matrix of 4 elements with columns of min and max values, and rows of x and y values.
# NOT RUN { bbox <- get_bbox (c (-0.15, 51.5, -0.1, 51.52)) # }
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