The region's name.
The value the region is shaded by.
OptionallonCentroid longitude, degrees east.
OptionallatCentroid latitude, degrees north.
OptionalneighborsThe regions this one shares a border with, by name.
Declared because it cannot be recovered: adjacency is not derivable from rendered SVG paths, and not from centroids either -- two regions can have near centroids and no shared border, and a long region can border one whose centroid is far away. A layer that declares none keeps the spatial walk and is told nothing about borders, rather than something guessed.
One region of a choropleth map.
The centroid is a longitude and a latitude in degrees, never a projected coordinate. Every producer has the pair --
d3.geoCentroidreturns exactly it -- and asking for degrees removes the one thing MAIDR could not otherwise resolve: whether a risingymeans north or south. Without them the map is read as a region list in declared order, which is a poorer reading but the one the data supports.Example