In this tutorial you can see how to quickly add and edit geometries in CartoDB. You can add points or draw new linestrings and polygons directly from map view.
Use a small bit of SQL to turn points into circles of specific center and radius.
First SQL used
UPDATE table_name SET the_geom = ST_Buffer(the_geom::geography, 100000)::geometry
Second SQL used
UPDATE table_name SET the_geom = ST_Buffer(the_geom::geography, 100000)::geometry WHERE name = 'Frankfurt'
PostgreSQL UPDATE documentation
PostGIS ST_Buffer documentation
In this quick tutorial we will show you how to use embed a CartoDB map in your Tumblr blog.
A quick tutorial on adding basemaps to your account. In this video we will show you how to add MapBox, XYZ, and WMS basemaps to your CartoDB account. Once those basemaps are added to your account, you can use them in any visualization you create!
Remember, when adding basemaps to add credit and attribution when necessary! Also, keep in mind that mapviews to your MapBox baselayers will be counted in your MapBox account and could lead to charges.
A quick screencast showing how we made the near real-time map of OSM contributor activity in response to the HOT initiative in the Philippians.
You can see the live map here (created Nov 12, 2013), cdb.io/1fyIYQf
For more information on the HOT initiative see bit.ly/19gNj52.
If you would like to embed this map in your own blogs, you can get the embed tag here, bit.ly/1dlvLJh