Determines the map scale at a specified latitude,
zoom level, and screen resolution.
For further information, refer to the Microsoft Bing Maps Tile System
documentation.
Usage
mapscale(latitude, zoom, screen_dpi)
Arguments
- latitude
Latitude (in degrees) at which to measure the map scale.
- zoom
Zoom or level of detail,
from 1 (lowest detail) to 23 (highest detail).
- screen_dpi
Resolution of the screen, in dots per inch.
Value
The map scale, expressed as the denominator N of the ratio 1 : N.
Examples
mapscale(
latitude = 0,
zoom = 6,
screen_dpi = 96
)
#> [1] 9244667
