Maps · World: choropleths and the world's countries

ChoroplethLayer washes each area by its value, keyed by its id or a
property's text or number, on one hue's scale from its faintest at the
least value to its strongest at the most; an area without a value reads
as no data. ChoroplethMap lays it on the owner's map, with or without
tiles, and puts a legend of the scale and of no data in the corner; a
value that matches no area is logged once. WorldMap washes Natural
Earth's 110m countries, bundled trimmed by scripts/countries.py, by ISO
3166 alpha-2 code, and fails on a key that is no code. A shape now
paints as one fill and one edge path per world in view.

assets/maps/countries.geojson

@@ -0,0 +1 @@
+{"type":"FeatureCollection","features":[{"type":"Feature","properties":{"name":"Fiji","iso":"FJ"},"geometry":{"type":"MultiPolygon","coordinates":[[[[180,-16.07],[180,-16.56],[179.36,-16.8],[178.73,-17.01],[178.6,-16.64],[179.1,-16.43],[179.41,-16.38],[180,-16.07]]],[[[178.13,-17.5],[178.37,-17.34],[178.72,-17.63],[178.55,-18.15],[177.93,-18.29],[177.38,-18.16],[177.29,-17.72],[177.67,-17.38],[178.13,-17.5]]],[[[-179.79,-16.02],[-179.92,-16.5],[-180,-16.56],[-180,-16.07],[-179.79,-16.02]]]]}},{"type":"Feature","properties":{"name":"Tanzania","iso":"TZ"},"geometry":{"type":"MultiPolygon","coordinates":[[[[33.9,-0.95],[34.07,-1.06],[37.7,-3.1],[37.77,-3.68],[39.2,-4.68],[38.74,-5.91],[38.8,-6.48],[39.44,-6.84],[39.47,-7.1],[39.19,-7.7],[39.25,-8.01],[39.19,-8.49],[39.54,-9.11],[39.95,-10.1],[40.32,-10.32],[39.52,-10.9],[38.43,-11.29],[37.83,-11.27],[37.47,-11.57],[36.78,-11.59],[36.51,-11.72],[35.31,-11.44],[34.56,-11.52],[34.28,-10.16],[33.94,-9.69],[33.74,-9.42],[32.76,-9.23],[32.19,-8.93],[31.56,-8.76],[31.16,-8.59],[30.74,-8.34],[30.2,-7.08],[29.62,-6.52],[29.42,-5.94],[29.52,-5.42],[29.34,-4.5],[29.75,-4.45],[30.12,-4.09],[30.51,-3.57],[30.75,-3.36],[30.74,-3.03],[30.53,-2.81],[30.47,-2.41],[30.76,-2.29],[30.82,-1.7],[30.42,-1.13],[30.77,-1.01],[31.87,-1.03],[33.9,-0.95]]]]}},{"type":"Feature","properties":{"name":"W. Sahara","iso":"EH"},"geometry":{"type":"MultiPolygon","coordinates":[[[[-8.67,27.66],[-8.67,27.59],[-8.68,27.4],[-8.69,25.88],[-11.97,25.93],[-11.94,23.37],[-12.87,23.28],[-13.12,22.77],[-12.93,21.33],[-16.85,21.33],[-17.06,21.0],[-17.02,21.42],[-17.0,21.42],[-14.75,21.5],[-14.63,21.86],[-14.22,22.31],[-13.89,23.69],[-12.5,24.77],[-12.03,26.03],[-11.72,26.1],[-11.39,26.88],[-10.55,26.99],[-10.19,26.86],[-9.74,26.86],[-9.41,27.09],[-8.79,27.12],[-8.82,27.66],[-8.67,27.66]]]]}},{"type":"Feature","properties":{"name":"Canada","iso":"CA"},"geometry":{"type":"MultiPolygon","coordinates":[[[[-122.84,49],[-122.97,49.0],[-124.91,49.98],[-125.62,50.42],[-127.44,50.83],[-127.99,51.72],[-127.85,52.33],[-129.13,52.76],[-129.31,53.56],[-130.51,54.29],[-130.54,54.8],[-129.98,55.28],[-130.01,55.92],[-131.71,56.55],[-132.73,57.69],[-133.36,58.41],[-134.27,58.86],[-134.94,59.27],[-135.48,59.79],[-136.48,59.46],[-137.45,58.91],[-138.34,59.56],[-139.04,60],[-140.01,60.28],[-141.0,60.31],[-140.99,66.0],[-140.99,69.71],[-139.12,69.47],[-137.55,68.99],[-136.5,68.9],[-135.63,69.32],[-134.41,69.63],[-132.93,69.51],[-131.43,69.94],[-129.79,70.19],[-129.11,69.78],[-128.36,70.01],[-128.14,70.48],[-127.45,70.38],[-125.76,69.48],[-124.42,70.16],[-124.29,69.4],[-123.06,69.56],[-122.68,69.86],[-121.47,69.8],[-119.94,69.38],[-117.6,69.01],[-116.23,68.84],[-115.25,68.91],[-113.9,68.4],[-115.3,67.9],[-113.5,67.69],[-110.8,67.81],[-109.95,67.98],[-108.88,67.38],[-107.79,67.89],[-108.81,68.31],[-108.17,68.65],[-106.95,68.7],[-106.15,68.8],[-105.34,68.56],[-104.34,68.02],[-103.22,68.1],[-101.45,67.65],[-99.9,67.81],[-98.44,67.78],[-98.56,68.4],[-97.67,68.58],[-96.12,68.24],[-96.13,67.29],[-95.49,68.09],[-94.69,68.06],[-94.23,69.07],[-95.3,69.69],[-96.47,70.09],[-96.39,71.19],[-95.21,71.92],[-93.89,71.76],[-92.88,71.32],[-91.52,70.19],[-92.41,69.7],[-90.55,69.5],[-90.55,68.47],[-89.22,69.26],[-88.02,68.62],[-88.32,67.87],[-87.35,67.2],[-86.31,67.92],[-85.58,68.78],[-85.52,69.88],[-84.1,69.81],[-82.62,69.66],[-81.28,69.16],[-81.22,68.67],[-81.96,68.13],[-81.26,67.6],[-81.39,67.11],[-83.34,66.41],[-84.74,66.26],[-85.77,66.56],[-86.07,66.06],[-87.03,65.21],[-87.32,64.78],[-88.48,64.1],[-89.91,64.03],[-90.7,63.61],[-90.77,62.96],[-91.93,62.84],[-93.16,62.02],[-94.24,60.9],[-94.63,60.11],[-94.68,58.95],[-93.22,58.78],[-92.76,57.85],[-92.3,57.09],[-90.9,57.28],[-89.04,56.85],[-88.04,56.47],[-87.32,56.0],[-86.07,55.72],[-85.01,55.3],[-83.36,55.24],[-82.27,55.15],[-82.44,54.28],[-82.13,53.28],[-81.4,52.16],[-79.91,51.21],[-79.14,51.53],[-78.6,52.56],[-79.12,54.14],[-79.83,54.67],[-78.23,55.14],[-77.1,55.84],[-76.54,56.53],[-76.62,57.2],[-77.3,58.05],[-78.52,58.8],[-77.34,59.85],[-77.77,60.76],[-78.11,62.32],[-77.41,62.55],[-75.7,62.28],[-74.67,62.18],[-73.84,62.44],[-72.91,62.11],[-71.68,61.53],[-71.37,61.14],[-69.59,61.06],[-69.62,60.22],[-69.29,58.96],[-68.37,58.8],[-67.65,58.21],[-66.2,58.77],[-65.25,59.87],[-64.58,60.34],[-63.8,59.44],[-62.5,58.17],[-61.4,56.97],[-61.8,56.34],[-60.47,55.78],[-59.57,55.2],[-57.98,54.95],[-57.33,54.63],[-56.94,53.78],[-56.16,53.65],[-55.76,53.27],[-55.68,52.15],[-56.41,51.77],[-57.13,51.42],[-58.77,51.06],[-60.03,50.24],[-61.72,50.08],[-63.86,50.29],[-65.36,50.3],[-66.4,50.23],[-67.24,49.51],[-68.51,49.07],[-69.95,47.74],[-71.1,46.82],[-70.26,46.99],[-68.65,48.3],[-66.55,49.13],[-65.06,49.23],[-64.17,48.74],[-65.12,48.07],[-64.8,46.99],[-64.47,46.24],[-63.17,45.74],[-61.52,45.88],[-60.52,47.01],[-60.45,46.28],[-59.8,45.92],[-61.04,45.27],[-63.25,44.67],[-64.25,44.27],[-65.36,43.55],[-66.12,43.62],[-66.16,44.47],[-64.43,45.29],[-66.03,45.26],[-67.14,45.14],[-67.79,45.7],[-67.79,47.07],[-68.23,47.35],Line truncated