Generate Raster Images from QuadKey-Identified Datasets
Add the rows needed to complete a regular QuadKey polygon grid derived...
Apply a 7 day lag to the variable n_crisis
Create grid of QuadKeys for a particular zoom or level of detail.
Create a stars raster
Format the Facebook mobility data
Get lat/long coordinates from the QuadKey
Get regular QuadKey polygon grid derived from the bounding box of the ...
Convert a grid of QuadKeys to square polygons
Ground resolution at a specified latitude and zoom level
Convert lat/long coordinates to pixel XY coordinates
Convert latitude/longitude coordinates into QuadKeys
Map scale (1 : N)
Map size in pixels
Detect dates and hours missing in filenames
Convert pixel XY coordinatess into lat/long coordinates.
Convert pixel XY coordinates into tile XY coordinates
Create and save raster images for different dates and times
Launch the Shiny App
Convert data.frame with quadkey column to a sf POLYGON data.frame
Convert a string of Quadkey numbers to lat/long coordinates
Convert a QuadKey into a square polygon
Convert a QuadKey into tile XY coordinates.
quadkeyr: Generate Raster Images from QuadKey-Identified Datasets
Read all the .csv files in a folder and format the data.
Convert a incomplete QuadKey sf POINT data.frame into a regular grid...
Convert tile XY coordinates into pixel XY coordinates
Convert tile XY coordinates into a QuadKey.
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>.
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