3221 search results for "map"

New Lesson: Mapping Historic Census Data in R

September 7, 2015
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New Lesson: Mapping Historic Census Data in R

Today I am happy to announce a new lesson for my free email course Learn to Map Census Data in R. This lesson explains how to get and map historic census data in R. While I had intended this lesson to only go to new signups, it looks like my email provider sent it (along The post

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Minimalist Maps

September 5, 2015
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Minimalist Maps

This week, I mentioned a series of maps, on Twitter, some minimalist maps http://t.co/YCNPf3AR9n (poke @visionscarto) pic.twitter.com/Ip9Tylsbkv — Arthur Charpentier (@freakonometrics) 2 Septembre 2015 Friday evening, just before leaving the office to pick-up the kids after their first week back in class, Matthew Champion (aka @matthewchampion) sent me an email, asking for more details. He wanted to know if I...

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How to Remove State Abbreviations from a Choroplethr Map

August 20, 2015
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How to Remove State Abbreviations from a Choroplethr Map

Today I will demonstrate how to remove state abbreviations from a choroplethr map. I will also demonstrate how to combine multiple maps into a single image. This is what the final image looks like: In this case the abbreviations obscure information for the northeast part of the country, so it’s useful to remove them. Step The post

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Visualising thefts using heatmaps in ggplot2

August 17, 2015
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Visualising thefts using heatmaps in ggplot2

This is a continuation of my previous article, where I gave a basic overview of how to construct heatmaps in R. Here, I will show you how to use R packages to build a heatmap on top of the map of Chicago to see which areas have the most amount of crime. We will require

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Mapping Historic US Presidential Election Results

August 13, 2015
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Mapping Historic US Presidential Election Results

Today I will demonstrate how to map historic US Presidential Election results in R. If you want to skip ahead and play with a shiny app that lets you visualize this dataset, then click here. The dataset we will use comes from wikipedia’s List of United States presidential election results by state and is packaged in the choroplethr The post

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Mapping the past and the future with Leaflet

July 29, 2015
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Mapping the past and the future with Leaflet

I have been working on mapping things for a while and I must say that I really like the Leaflet package from Rstudio. It makes it very easy and straight forward to make leaflet maps. A while back I stumbled upon an interactive graphic from The Times, that used census data to compare each US... Read more »

Making Static/Interactive Voronoi Map Layers In ggplot/leaflet

July 26, 2015
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Making Static/Interactive Voronoi Map Layers In ggplot/leaflet

Despite having shown various ways to overcome D3 cartographic envy, there are always more examples that can cause the green monster to rear it’s ugly head. Take the Voronoi Arc Map example. For those in need of a primer, a Voronoi tesslation/diagram is: …a partitioning of a plane into regions based on distance to points

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A Path Towards Easier Map Projection Machinations with ggplot2

July 24, 2015
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A Path Towards Easier Map Projection Machinations with ggplot2

The $DAYJOB doesn’t afford much opportunity to work with cartographic datasets, but I really like maps and tinker with shapefiles and geo-data when I can, plus answer a ton of geo-questions on StackOverflow. R makes it easy—one might even say too easy—to work with maps. All it takes to make a map of the continental

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mapView: basic interactive viewing of spatial data in R

July 24, 2015
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mapView: basic interactive viewing of spatial data in R

Working with spatial data in R I find myself quite often in the need to quickly visually check whether a certain analysis has produced reasonable results. There are two ways I usually do this. Either I: (sp)plot the data in … Continue reading →

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Administrative Maps and Projections in R

July 23, 2015
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Administrative Maps and Projections in R

Today I will demonstrate how to create maps of “other countries”, and use map projections, with the choroplethr package in R. I write “other countries” in quotes because, like most things, translating a high level wish into software can be complicated. If you want to skip ahead and play with a web app that lets you explore The post

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