2622 search results for "map"

Mapping the world with tweets (including a GIF without cats and a Shiny App).

February 16, 2015
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Mapping the world with tweets (including a GIF without cats and a Shiny App).

A few days ago, I collected 30 minutes of tweets all around the world. I used the twitteR and streamR packages for this. The nice thing about those tweets is that they have geo-information associated with them. Not all of them, of course, but more than...

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The leaflet package for online mapping in R

January 31, 2015
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The leaflet package for online mapping in R

It has been possible for some years to launch a web map from within R. A number of packages for doing this are available, including: RgoogleMaps, an interface to the Google Maps api leafletR, an early package for creating Leaflet maps with R rCharts, which can be used as a basis for webmaps In this tutorial we use...

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Rediscovering Formula One Race Battlemaps

January 31, 2015
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Rediscovering Formula One Race Battlemaps

A couple of days ago, I posted a recipe on the F1DataJunkie blog that described how to calculate track position from laptime data. Using that information, as well as additional derived columns such as the identity of, and time to, the cars immediately ahead of and behind a particular selected driver, both in terms of

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Turning R into a GIS – Mapping the weather in Germany

January 29, 2015
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Turning R into a GIS – Mapping the weather in Germany

Nothing has gotten more attention in the visualization world like the map-based insights, or in other words, just plotting on a map different KPIs to allow for a playful discovery experience. I must admit,...

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Assessing mapdata world coastline

January 27, 2015
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Assessing mapdata world coastline

Introduction The mapdata R package contains a coastline called worldHires which is contained within a text file with a bit over 2 million lines. Since the coastlineWorldFine dataset in the ocedata package contains about 0.5 million points, I thought I would explore how much better the mapdata coastline might be. Methods First, I wrote the following C file to translate the...

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Building a choropleth map of Italy using mapIT

January 19, 2015
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Building a choropleth map of Italy using mapIT

In the R environment, different packages to draw maps a

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Introducing rleafmap. An R package for interactive maps with Leaflet.

January 19, 2015
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Introducing rleafmap. An R package for interactive maps with Leaflet.

Obviously, I am late… I released rleafmap about 1 year ago and I am just writing this blog post today. During this time, I presented the package to the french R-users community at the 3eme Rencontres R in Montpellier and … Lire la suite →

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Multivariate analysis of death rate on the map of Europe

January 11, 2015
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Multivariate analysis of death rate on the map of Europe

Eurostat has information on death rates by cause and NUTS 2 region. I am trying to get this visually displayed on the map. To get there I map all causes to three dimensions via a principal components analysis. These three dimensions are subsequently tr...

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Do You Know What You Show at Your Map?

January 10, 2015
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Do You Know What You Show at Your Map?

As access to the GIS and mapping is becoming easier every year the more people and companies create maps. Unfortunately often they just do not know what they are actually showing at their maps. This issue is being mentioned over and over again.  Here is the example that I discovered recently: Cyberthreat Real-Time Map by Kaspersky...

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WrightMap: Multifaceted models

January 7, 2015
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WrightMap: Multifaceted models

We received an email from a user who was interested in displaying results from a multifaceted model in WrightMap. In the WrightMap manual, we show how to use multifaceted results from ConQuest: fpath <- system.file("extdata", package = "WrightMap") model4 <- CQmodel(file.path(fpath, "ex4a.mle"), file.path(fpath, "ex4a.shw")) wrightMap(model4, item.table = "rater", interactions = "rater*topic", step.table = "topic") (See this tutorial for more details.) But...

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