check_map: Checks whether the desired map background is available.

In PawelMG/gis_server: Package facilitating the use of open map data

Description

The check_map queries the map database to check for available maps. The parameters taken into account are the bounding box (extent of the spatial object) and the desired scale of the map.

Usage

check_map(db, ext_map, options_list = NULL, sel = FALSE)

Arguments

db	a SQLiteConnection object that specifies the connection to the database.
ext_map	a spatial object of class 'extent' from the 'raster' package holding the data on the extreme coordinates of the input object.
options_list	a list of graphical and other parameters used by the rendering engine.

Value

mapl a data frame holding one record from the map database.

PawelMG/gis_server documentation built on May 9, 2019, 2:24 p.m.