d3-geo | Series of d3.geo processes | Time Series Database library

In order to extend map projections in D3 it's suggested to require the packages like this:

Using the orthographic projection in d3-geo I'd like to be able to render points on the invisible side of the projected sphere. Specifically, I'm making an animation where a train of points travels around a meridian, but when they reach the edge, it's as if they fall off (until they reach the other side, of course). Please see my code snippet below.

Currently, the path generator (path in my example) simply returns null if you try to evaluate it on a point that's hidden. This is of course what it's supposed to do, but is it possible to tweak it such that it gives me the equivalent point on the front surface, such that I can render it in a lighter color so that it's as if we're looking through the sphere?

I've been playing around with d3.js for the first time and have managed to create a basic chloropleth map.

In essence there are 3 things remaining that i'd like to do, but am not familiar enough with d3 or Javascript to do them:

1. Make legend horizontal and move it below the coast of Africa

2. Add thin black border to all of the countries.

3. Perhaps automatically crop out antartica? This can be done in post processing if not possible

Not sure if these tasks are impossible or easy as I have not worked much with d3.js and wasn't making much headway.

I'm trying to create a world map with topojson and d3-geo using scalajs based on the following example: How-to-create-pure-react-SVG-maps-with-topojson-and-d3-geo

My biggest issue so far is what I don't understand how I can implement geoEqualEarth() and geoPath() functions from d3-geo using scala since both of them have a number of methods, for example const projection = geoEqualEarth().scale(160).translate([ 800 / 2, 450 / 2 ]). This piece of code suppose to create a projection (which is assumed to be an array of numeric values), and that projection is later used in geoPath().projection(projection)(d) to create a proper input string for the tag. I'm really confused about how such kind of logic can be implemented in scala and I'm not sure if I can use pure JS in this case.

I am trying to create a simple bubblemap that plots longitude-latitude pairs by a number of admissions for a county using US DHS data. My CSV file has the name of county, longitude, latitude, type of Admission, class of admission, number of admissions, and country of origin. I've created some checkboxes that will allow the user to see a bubblemap of the different classes of admissions that were admitted to the United States.

I've learned that the d3geoAlbersUsa projection projects the map of the USA at [0,0] which is off the coast of Africa. From the photo below (see Imgur link), you can see that my points seem to plot at the correct coordinates. However, the background map is not visible. When I use d3.geoMercator() and center the projection on [0,0] I see the map. In both cases, I don't know how to make the bubbles appear on the map.

I'm new to d3 so I'm not sure how to go about this. How do I create a bubblemap using long lat coordinates with the d3geoAlbersUsa projection? Thanks for the help.

Here is my index.html:

I'm trying to plot circles on top of a map using d3.js, I got most of the code working and can plot points from custom data, however when it comes to plotting them from csv the same code doesn't work

Here is the full code:

My question is very similar to D3 V4 Properly placing a bubble in the US Map, but the map I'm using is a map of Scotland's local authority districts instead so I can't quite see how to apply either of the solutions.

I'm creating a bubble map on top of a choropleth map of Scotland, with circles at specified locations which I'm providing as latitude/longitude coordinates.

However, the locations of the circles are completely out - the circle for Aberdeen is in the sea!

Based on D3 V4 Properly placing a bubble in the US Map, I think perhaps the GeoJSON is pre-projected so I'm using two different projections, one for the map and one for the circles. Ideally I think I would find a different GeoJSON that didn't cause this problem, but I think the one I'm using from https://martinjc.github.io/UK-GeoJSON/ is the only one available.

So my question is, is there a sensible method for figuring out what projection this map is, in order that I can use the same projection for the circles?

This is my first question on here so please bear with.

I'm trying to make a choropleth (a map where different sections are coloured in based on some value assigned to them) using d3.js. I'm using the example given at https://www.d3-graph-gallery.com/graph/choropleth_basic.html, but changing the map to one of Scotland and changing the values to population density.

When I run it, I get a map but it's all coloured in the same shade of blue. I've tried changing the domain of colorScale but to no avail.

This is what I've got at the minute:

I'm rendering a geoAlbersUSA SVG map using d3-geo and topojson-client - as shown below - but I'm trying to do something fancy when a user clicks on the path. I would like to scale and translate the underlying path, in this case Idaho or Virginia, so that the state "floats" above the United States, but is still centered on the centroid. Every time I try to simply scale the element it ends up many pixels away; is there a way to calculate a translate() that corresponds to how much you have scaled the element?