< 04.12.2017>
Grab this page here: http://bit.ly/viz-with-carto
- Mehak Sachdeva, mailto:mehak@carto.com, @MehakSachdeva_
- Hi!
- Maps we like
- Recent maps we made
- Blogposts
- Misc
Columbia has a CARTO site license where you get primo accounts :) If you don't have an account on this already, head to:
https://columbialibraries.carto.com/signup
Make sure to use your columbia.edu email address to signup.
CARTO is in the middle of upgrading all accounts from our old product (Editor) to the current one (Builder). If your account looks different from ours, let us know and we'll get you upgraded.
- easily overlay data onto a map
- analyze the data to reveal spatial patterns
- tell stories by creating beautiful visualizations
- and then share them with the world!
- SQL and PostGIS
- map styling with CartoCSS
- JavaScript for overlay and interactivity
- A tileserver turning all that data and styles to TILES
Add it up and you roughly get CARTO.
Look at our code! Find the errors bugging you, improve it, be a part of a community.
http://github.com/CartoDB/cartodb
Welcome to Carto Builder!
A peek at the map for this session: Albatross Tracking Map
The inspiration for this was based on this amazing article by Nat-Geo. You can get all kinds of cool datasets on animal tracking from Movebank.org
Download the Dataset for this session HERE
- Style
- Animated Styling
- Connect with Lines
- Turbo-Carto (CartoCSS)
#layer {
line-width: 2;
line-color: ramp([category], (#5F4690, #1D6996, #38A6A5, #0F8554, #73AF48, #EDAD08, #E17C05, #CC503E),
("1163-1163", "3275-30662", "4261-2228", "4266-84831108", "unbanded-153", "unbanded-154", "unbanded-156", "unbanded-159"), "=");
line-comp-op: screen;
line-dasharray: 1;
}
First we need to sync a new dataset. Search for "usgs earthquake spreadsheet" to find the page, or use the following dataset of all recorded seismic events from the past 30 days:
http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_month.csv
This is updated every 15 minutes, so it's a great candidate for making a map which updates based on measurements in the world. Let's import that into our accounts. Even cooler: the map we publish will be updated automatically, and the underlying analysis changes dynamically based on the new points added to the dataset.
To build our analysis workflow, let's focus on the output we would like.
Visualize significant, recent earthquake events by communicating the total population who are living within 50 miles of the epicenter.
We can build this analysis workflow in the Builder by chaining together some of the tools.
- We need to restrict our analysis to California (within 50 miles of the borders)
- Filter to only show significant events
- Find the number of people living with 50 miles of the earthquake events
- Visualize the points by the number of people (proportional symbol map)
There are many ways to get the boundary of California. One ways is just grab all the states from Natural Earth Data. Another ways is to grab it from my CARTO account:
http://mehak-carto.cartodb.com/api/v2/sql?q=SELECT%20*%20FROM%20us_states&format=shp&filename=us_states
Copy that link, and import it just like you did for the earthquake dataset above. Finally, we can do some Analysis with the Builder to get it into the state that we're interested in (50 miles outside of current borders).
We can again use the Builder to find all earthquakes which intersect California or are within 50 miles of its border by using the "Aggregate intersection" method.
Using the "Filter by column value" analysis method, we can surface only the significant earthquakes (by magnitude).
Using the "Create areas of influence" tool, we can get the regions that are within a 50 mile distance of the epicenter of an earthquake.
This analysis allows us to attach valuable information from sources such as the US Census. For our demo we will use Total Population that are within 50 miles of the epicenter of the earthquakes.
