mapscale

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.

A set of functions of increasing complexity allows users to
(1) convert QuadKey-identified datasets,
based on 'Microsoft's Bing Maps Tile System', into Simple Features data frames,
(2) transform Simple Features data frames into rasters, and
(3) process multiple 'Meta' ('Facebook') QuadKey-identified human mobility files
directly into raster files.
For more details, see D’Andrea et al. (2024) <doi:10.21105/joss.06500>.

Florencia D'Andrea

quadkeyr

Generate Raster Images from QuadKey-Identified Datasets

Pilar Fernandez

Maria Paula Caldas

Vincent van Hees

Andrew Pulsipher

CDC's Center for Forecasting and Outbreak Analytics 

MIDAS-NIH COVID-19 urgent grant program 

Paul G. Allen School for Global Health, Washington State University 

mapscale function

<dl><dt>latitude</dt>
<dd>Latitude (in degrees) at which to measure the map scale.</dd>
<dt>zoom</dt>
<dd>Zoom or level of detail,
from 1 (lowest detail) to 23 (highest detail).</dd>
<dt>screen_dpi</dt>
<dd>Resolution of the screen, in dots per inch.</dd></dl>

Arguments

Map scale (1 : N) — mapscale

<dl>

<dt>latitude</dt>
<dd>Latitude (in degrees) at which to measure the map scale.</dd>


<dt>zoom</dt>
<dd>Zoom or level of detail,
from 1 (lowest detail) to 23 (highest detail).</dd>


<dt>screen_dpi</dt>
<dd>Resolution of the screen, in dots per inch.</dd>

</dl>

mapscale: Map scale (1 : N)

Description

Usage

Value

Arguments

References

Examples