Get the Hydrography90m 20°x20° tile ID — get_tile

Identifies the 20°x20° tile IDs of the Hydrography90m data in which the input points are located. The IDs can then be used to download the data using download_tiles(). The input is a data frame with point coordinates. For orientation, please also see the tiles at the https://hydrography.org/hydrography90m/hydrography90m_layers

Usage

get_tile_id(data, lon, lat, tempdir = NULL)

Arguments

data: a data.frame or data.table that contains the columns regarding the longitude / latitude coordinates in WGS84.
lon: character. The name of the column with the longitude coordinates.
lat: character. The name of the column with the latitude coordinates.
tempdir: character. The directory to be used as temp folder. Optional.

Author

Afroditi Grigoropoulou

Examples

# Download test data into the temporary R folder
# or define a different directory
my_directory <- tempdir()
download_test_data(my_directory)

# Load species occurrence data
species_occurrence <- read.table(paste0(my_directory,
                                       "/hydrography90m_test_data",
                                       "/spdata_1264942.txt"),
                                 header = TRUE)

# Get the tile ID
get_tile_id(data = species_occurrence,
            lon = "longitude", lat = "latitude")