As some of you may already know, Newsweek / The Daily Beast has been using CartoDB for some time now, and as such today’s blog post comes from Michael Keller of Newsbeast labs. We’d also like to take the opportunity thank Michael for his amazing contributions to the CartoDB community. Thanks!
I have been reusing code from former projects and so it was about time I standardized them into reusable templates with Leaflet.js. I released them on Github this week.
I made three categories: basic map with hover states, hover states + hover infowindow, and all of that with templated infowindows using Underscore.js.
In each of these categories you’ll see a template for a point map, a polygon map, and a map with both points and polygons.
On point + polygon templates, the polygon hover state turns off when you hover over a point.
Hover windows follow the mouse and respect the boundaries of the map-canvas. I find it most useful to have hover windows close to the mouse so your eye doesn’t have to leave that map region to see that region’s details
Templates with Underscore.js hover windows include sample formatHelper functions to act as a formatting layer between your data values and how you want them to display. For instance, you could store all your feature attributes as boolean variables and run them through various formatHelpers functions to return nice display strings.
The hover states work by storing a simplified GeoJSON representation of that feature as a feature attribute. On featureOver, that GeoJSON is plotted as a vector using Leaflet.js.
Point + polygon templates add a secondary style class to hover windows when hovering over points to differentiate from polygons.
If you have any questions, I’m at @mhkeller. If you have improvements, pull requests at http://github.com/mhkeller/cartodb-templates
Socio-economic inequalities in the UK have remained persistently high over the last forty years. In the UK, the Gini coefficient, a commonly used measurement of inequality,...Customer Stories
Every now and then at CARTO we see incredible maps that tell important stories about cities, organizations, our world and people. We spotted this one from one of our users ...Customer Stories
Founded in 2011 as a blog focused on highlighting the latest geospatial technologies, Geoawesomeness has become a powerful resource for those looking to keep their thumb on...Customer Stories
Please fill out the below form and we'll be in touch real soon.