I am using a tutorial to learn how to generate maps in D3.v3, but I am using D3.v4. I am just trying to get some circles to appear on the map (see below). The code works except that the circles are over Nevada and should be in the Bay Area. I imagine...
I'm trying to plot a few points onto a map using the D3 geo library based on latitudes and longitudes. However, when I pass these values into my projection function, it results in coordinates that our outside the bounds of my SVG image. My code i...
I am working with choropleth charts in plotly.js.  Is there a way to get the colorbar scale to display horizontally at the bottom of the chart instead of vertically along the right or left sides?    For reference, check out the first example given at...
I don't need the city or address, just the state. And I don't want to make an API call if possible. The priority is a light-weight solution, ideally just Javascript.  I have a user-input zipcode, and I want to display a paragraph of text depe...
I am trying to produce a visualisation involving a map of the UK and all of it's ~650 electoral constituencies. I have drawn the map by following this excellent tutorial http://bost.ocks.org/mike/map/ and it works great. However the only source I...
I am using D3.js and TopoJSON libraries to render a flat SVG map of the world in a small div on a web page.  I'm also taking some geographic objects (polygons and circles), and plotting them on this map via lat/long coordinates.  This all seems t...
Hi to all i'm developing a map with raphael.js as they do in here : http://raphaeljs.com/world/  the problem is that i'm using a custom svg world map so they function getXY() obviously wont return the correct x,y of a lat,lng.  How can i calc...
This might be a simple question, but I have a map in d3 and I'd like to represent event-counts as squares.  Here's an example png of what I'm going for:    They're not aligned perfectly in the picture, but let's say I have a JSON:...
I have data of, say, density over 30 districts from 2000 to 2010. I'd like to make an interactive choropleth map for each year and then either use a slider (ideally) or a radio button to select between years.  I can get interactivity on the first...
The d3.geo.path has a null projection because the TopoJSON is already projected, so it can be displayed as-is. I'm trying to plot data in the form of [longitude, latitude] on a map.   Below is what my code basically looks like:  var width, height...

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