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Query monitoring scheme locations from Meetnetten

Source: R/get_meetnetten_locations.R
get_meetnetten_locations.Rd

This function queries the Meetnetten database for the locations and sublocations for a specified monitoring scheme or for all monitoring schemes within a specified species group. When no monitoring scheme or species group is specified, the observations of all monitoring schemes are returned.

Usage

get_meetnetten_locations(connection, scheme_name = NULL, species_group = NULL)

Arguments

connection

dbconnection with the database 'S0008_00_Meetnetten' on the inbo-sql08-prd.inbo.be server

scheme_name

the name of the monitoring scheme for which you want to extract location data. Data from multiple schemes can be selected by providing a vector with the names of the schemes.

species_group

the name of the species group for which you want to extract location data. Data from multiple species groups can be selected by providing a vector with the names of the species groups.

Value

When the sf package is installed, a list with two sf objects is returned:

  • main_locations: the main locations of the selected monitoring schemes, with following attribute variables:

    • species_group

    • scheme: name of the monitoring scheme

    • location: name of the location

    • is_sample: whether the location belongs to the sample of locations for the monitoring scheme (see details)

    • is_active: when a location is not suited for counting any more, the location becomes inactive (is_active = FALSE)

  • sublocations: the sublocations (for example the sections of a transect) for each of the selected main locations, with following attribute variables:

    • species_group

    • scheme: name of the monitoring scheme

    • location: name of the main location

    • sublocation: name of the sublocation

    • is_active: whether the sublocation is counted or not

When the sf package is not installed, a list with two tibble objects is returned, with the same attribute variables as above and an additional variable geom that contains the geometry information in wkt (well-known text) format.

Not all main locations are subdivided in sublocations. So in some cases the sublocations object is empty.

Details

Each monitoring scheme of the species monitoring programme of Flanders Meetnetten consists of a fixed set of locations. A monitoring scheme for rare species includes all locations where the species occurs. For more common species a sample of locations is drawn and the the selected locations are included in the monitoring scheme. In some cases, the monitoring project in Meetnetten also contains locations that are not part of the sample. These locations can be counted optionally and are indicated by (is_sample = FALSE).

It also occurs that a location becomes inaccessible or that the target species disappears. Then, a locations can be made inactive (is_active = FALSE), which means that no observations can be recorded any more.

See also

Other meetnetten: get_meetnetten_observations(), get_meetnetten_schemes(), get_meetnetten_visits()

Examples

if (FALSE) { # \dontrun{
library(inbodb)
con <- connect_inbo_dbase("S0008_00_Meetnetten")

# get locations for a specific monitoring scheme
locations_heivlinder <- get_meetnetten_locations(con,
                                                 scheme_name = "Heivlinder")

locations_heivlinder$main_locations
locations_heivlinder$sublocations

# get locations for a specific species_group
locations_dragonflies <- get_meetnetten_locations(con,
                                                  species_group = "libellen")

locations_dragonflies$main_locations
locations_dragonflies$sublocations

# Close the connection when done
dbDisconnect(con)
rm(con)
rm(locations_heivlinder)
rm(locations_dragonflies)
} # }