---
title: "Using Tilegrams in R"
author: "Bhaskar V. Karambelar"
date: "`r Sys.Date()`"
bibliography: bibliography.bib
output:
  rmarkdown::html_document:
    mathjax: null
    theme: yeti
    toc: true
    toc_depth: 4
    toc_float: true
vignette: >
  %\VignetteIndexEntry{Using Tilegrams in R}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

The goal of `tilegramsR` package is to provide R spatial objects in `sf` [@sf] format representing various Tilegrams. The primary purpose of this data is to be used for data visualization. The objects provided can be plotted using base R plotting, ggplot2 [@ggplot2], or leaflet [@leaflet].

To know more about Tilegrams see [this post](https://github.com/PitchInteractiveInc/tilegrams/blob/master/MANUAL.md) and a [this web app](https://pitchinteractiveinc.github.io/tilegrams/).

# Usage

## Installation

```{r eval=FALSE}
install.packages('tilegramsR')

#OR Latest Development version

devtools::install_github('bhaskarvk/tilegramsR')
```

## Example Code

Check out `inst\examples` folder, or see it in action at [Rpubs: tilegramsR](http://rpubs.com/bhaskarvk/tilegramsR) and [Rpubs: Election Map](http://rpubs.com/bhaskarvk/electoral-Map-2016).


# Data

The package provides spatial objects in [sf](https://github.com/edzer/sfr) format.

## Pitch Interactive Tilegrams

### U.S.A

- **sf_Pitch_US_Population_2016_v1**: A `sf` object where each feature = 500K people
- **sf_Pitch_US_Population_2016_v1.states**: A `sf` object where each feature =  1 state of the U.S.A 
- **sf_Pitch_US_Population_2016_v1.centers**: A `sf` object of centroids of each state of the U.S.A.

### Germany

- **sf_germany_constituencies**: A `sf` object where each feature is a German Constituency
- **sf_germany_constituencies.centers**: A `sf` object of centroids of each German Constituency

### France

- **sf_france_regions_population**: A `sf` object of French regions
- **sf_france_regions_population.regions**: A `sf` object of boundaries of French regions
- **sf_france_regions_population.centers**: A `sf` object of centroids of each French region
- **sf_france_all_regions_population**: A `sf` object of French Regions including overseas regions
- **sf_france_all_regions_population.regions**: A `sf` object of boundaries of all French regions
- **sf_france_all_regions_population.centers**: A `sf` object of centroids of each French Region including overseas regions
- **sf_france_departments**: A `sf` object of French departments
- **sf_france_departments.centers**: A `sf` object of centroids of each French department

## fivethirtyeight's Electoral College Tilegram

- **sf_FiveThirtyEightElectoralCollege**: A `sf` object where each feature = 1 electoral college
- **sf_FiveThirtyEightElectoralCollege.states**: A `sf` object where each feature =  1 state of the U.S.A 
- **sf_FiveThirtyEightElectoralCollege.centers**: A `sf` object of centroids of each state of the U.S.A.

## NPR  

### Hexagon Tilegram

- **sf_NPR1to1**: A `sf` object where each feature =  1 state of the U.S.A
- **sf_NPR1to1.centers**: A `sf` object of centroids of each state of the U.S.A.

### NPR.DemersCartogram

- **sf_NPR.DemersCartogram**: A `sf` object where each feature =  1 state of the U.S.A
- **sf_NPR.DemersCartogram.centers**: A `sf` object of centroids of each state of the U.S.A.


## Daily KOS

### Dual Hexagon Tilegram

- **sf_DKOS_50_State_OuterHex_Tilemap_v1**: A `sf` object where each feature =  1 state of the U.S.A
- **sf_DKOS_50_State_InnerHex_Tilemap_v1**: A `sf` object where each feature =  1 state of the U.S.A
- **sf_DKOS_50_State_Hex_Tilemap_v1.centers**: A `sf` object of centroids of each state of the U.S.A.

### Congressional Districts Tilegram

- **sf_DKOS_CD_Hexmap_v1.1**: A `sf` object where each feature = 1 congressional District
- **sf_DKOS_CD_Hexmap_v1.1.states**: A `sf` object where each feature =  1 state of the U.S.A
- **sf_DKOS_CD_Hexmap_v1.1.centers**: A `sf` object of centroids of each state of the U.S.A.

### Electoral College Tilegram

- **sf_DKOS_Electoral_College_Map_v1**: A `sf` object where each feature = 1 electoral college
- **sf_DKOS_Electoral_College_Map_v1.states**: A `sf` object where each feature =  1 state of the U.S.A
- **sf_DKOS_Electoral_College_Map_v1.centers**: A `sf` object of centroids of each state of the U.S.A.

### Distorted Electoral College Tilegram

- **sf_DKOS_Distorted_Electoral_College_Map_v1**: A `sf` object where each feature =  1 state of the U.S.A
- **sf_DKOS_Distorted_Electoral_College_Map_v1.centers**: A `sf` object of centroids of each state of the U.S.A.

## Washington Post Tilegram

- **sf_WP**: A `sf` object where each feature =  1 state of the U.S.A
- **sf_WP.centers**: A `sf` object of centroids of each state of the U.S.A.

## Wall Street Journal Tilegram

- **sf_WSJ**: A `sf` object where each feature =  1 state of the U.S.A
- **sf_WSJ.centers**: A `sf` object of centroids of each state of the U.S.A.

## Datamap.io.tilegram

- **sf_Datamap.io.tilegram**: A `sf` object where each feature =  1 state of the U.S.A
- **sf_Datamap.io.tilegram.centers**: A `sf` object of centroids of each state of the U.S.A.

As and when newer Tilegrams are made available they will be added to this package.

# Credits

- [Pitch Interactive](https://twitter.com/pitchinc) for the excellent [Tilegrams](https://pitchinteractiveinc.github.io/tilegrams/) webapp and population tilegram.
- [Daniel Donner](https://twitter.com/donnermaps) of [Daily KOS](https://refinery.dailykosbeta.com/elections-maps) for Tilegrams.
- [Ella Koeze](https://twitter.com/ellawinthrop) for [fivethirtyeight[.]com](https://projects.fivethirtyeight.com/2016-election-forecast/) Tilegrams.
- [Danny DeBelius](https://twitter.com/dannydb) & [Brian Boyer](https://twitter.com/brianboyer) for [NPR](http://blog.apps.npr.org/2015/05/11/hex-tile-maps.html)'s Hexagon Tilegrams.
- [NPR Demers Cartogram](http://www.npr.org/2016/10/18/498406765/npr-battleground-map-hillary-clinton-is-winning-and-its-not-close)
- [Washington Post Tilegram](https://www.washingtonpost.com/graphics/politics/2016-election/50-state-poll/)
- [Wall Street Journal Tilegram](http://graphics.wsj.com/elections/2016/2016-electoral-college-map-predictions/)
- [Datamap.io Tilegram](https://elections.datamap.io/us/2016/09/23/electoral_college_forecast)

# References