Shown is Lake Superior and the surrounding terrain, using data from NASA’s Shuttle Radar Topography Mission and bathymetry data from NOAA.
The two images are layered using a clipping path of the lake, from Natural Earth’s 10m vector lake dataset.
Hill relief, as usual, was generated using the gdal utility suite.
| <!doctype html> | |
| <meta charset='utf-8'> | |
| <title>Lake Superior</title> | |
| <style> | |
| .lake { | |
| stroke: none; | |
| fill: none; | |
| } | |
| </style> | |
| <svg></svg> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://d3js.org/topojson.v0.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500, | |
| svg = d3.select("svg").attr("width", width).attr("height", height); | |
| var projection = d3.geo.albers() | |
| .rotate([88.1, 0]) | |
| .center([0, 47.7]) | |
| .parallels([45.5, 49.8]) | |
| .scale(9600) | |
| var path = d3.geo.path() | |
| .projection(projection); | |
| d3.json("lakes-topo.json", function(error, data) { | |
| var lakes = topojson.object(data, data.objects.lakes); | |
| svg.append("image") | |
| .attr("xlink:href", "hill-relief.jpg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .attr("class", "bg"); | |
| svg.selectAll(".lake") | |
| .data(lakes.geometries) | |
| .enter().append("path") | |
| .attr("d", path) | |
| .attr("class", "lake") | |
| .attr("id", "superior"); // There is only one lake in this set. | |
| svg.append("clipPath") | |
| .attr("id", "clip") | |
| .append("use") | |
| .attr("xlink:href", "#superior"); | |
| svg.append("image") | |
| .attr("clip-path", "url(#clip)") | |
| .attr("xlink:href", "superior.jpg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .attr("class", "bg"); | |
| }); | |
| </script> |
| {"type":"Topology","transform":{"scale":[0.0007758742874287437,0.00026045004500450014],"translate":[-92.114185,46.423397]},"objects":{"lakes":{"type":"GeometryCollection","geometries":[{"type":"Polygon","arcs":[[0],[1],[2],[3],[4],[5],[6],[7],[8],[9],[10],[11],[12],[13],[14],[15],[16]],"id":"Lake Superior"}]}},"arcs":[[[9827,89],[-51,-64],[-52,-25],[-44,54],[12,78],[-31,102],[-49,68],[-42,-25],[-33,-66],[-45,-45],[-47,-27],[-43,-9],[-21,9],[-54,72],[-48,24],[-9,11],[-18,55],[-13,18],[-17,-6],[-42,-43],[-21,-7],[-25,18],[-16,33],[-11,48],[-10,58],[36,90],[13,65],[-17,129],[23,451],[7,57],[18,47],[22,32],[20,36],[11,67],[-30,-9],[-54,-37],[-27,-8],[-109,29],[-99,-17],[-119,-81],[-236,-249],[-59,-22],[-437,95],[-40,-17],[-9,26],[-36,-45],[-212,-92],[-35,14],[-35,45],[-177,-264],[-147,-137],[-51,-92],[-47,-16],[-20,-17],[-58,-104],[-17,-41],[-62,-193],[-40,-83],[-43,-25],[2,17],[4,42],[3,17],[-37,1],[-27,13],[-24,35],[-23,70],[-28,49],[-26,-21],[-39,-95],[-26,-32],[-35,-19],[-31,9],[-14,57],[-6,32],[-14,7],[-16,-1],[-12,14],[-40,119],[-6,37],[-2,23],[-4,21],[-15,27],[-16,17],[-18,7],[-18,-9],[-14,-30],[-12,-17],[-16,-3],[-34,5],[-7,-14],[-21,-68],[-11,-23],[-31,-5],[-62,25],[-55,-58],[-157,55],[-33,38],[-18,79],[-7,193],[-5,27],[-13,17],[-68,64],[-12,37],[2,55],[-24,36],[-26,56],[-21,66],[-9,66],[-12,36],[-59,134],[-17,52],[-21,168],[-20,74],[-26,-18],[-14,-16],[-10,35],[-11,86],[-9,5],[-32,-22],[-16,5],[-13,27],[-12,69],[-11,35],[-12,9],[-14,-3],[-13,3],[-5,29],[-17,34],[-137,77],[-208,39],[-71,-14],[-102,-61],[-22,-49],[-11,-79],[-29,-83],[-34,-65],[-31,-20],[0,24],[26,76],[23,107],[25,94],[72,76],[38,77],[13,67],[-38,6],[-20,-18],[-59,-90],[-56,-116],[-41,-37],[-38,-89],[-20,-20],[-44,-11],[-15,-25],[19,-45],[-71,-207],[-43,-104],[-18,25],[5,25],[12,15],[12,12],[10,13],[3,23],[-4,24],[-26,113],[-5,37],[5,38],[9,35],[4,37],[-1,36],[-7,36],[16,65],[14,90],[10,94],[4,82],[-7,75],[-19,72],[-23,61],[-22,42],[-9,-1],[-8,-16],[-9,-7],[-9,24],[-1,18],[8,39],[11,106],[2,45],[-6,40],[-29,52],[-67,19],[-33,22],[-29,59],[-3,64],[9,79],[6,100],[-13,87],[-29,3],[-33,-37],[-216,-382],[-36,-37],[-9,-15],[-26,-111],[-5,-18],[-7,-34],[-46,-159],[-22,-48],[-13,-10],[-40,-13],[-52,-46],[-14,-6],[-63,30],[-27,-4],[-29,-52],[-94,-216],[-105,-164],[-116,-114],[-511,-129],[-52,-57],[-236,-453],[-54,-65],[-229,-154],[-67,-89],[-16,-8],[-43,-7],[-34,-18],[-33,-33],[-62,-90],[-25,2],[-55,67],[-93,48],[-119,144],[-96,194],[-27,35],[9,-14],[26,-64],[-14,2],[-14,-4],[-13,-11],[-12,-16],[0,-24],[45,0],[-24,-73],[-34,-53],[-154,-135],[-38,-17],[-33,37],[15,76],[22,76],[82,208],[7,44],[-6,38],[-9,38],[-6,38],[3,66],[8,82],[15,70],[24,30],[22,37],[32,174],[21,53],[-6,38],[-3,15],[29,32],[-3,30],[-17,30],[-9,26],[-6,73],[-13,25],[-39,-7],[-7,12],[-2,24],[-1,28],[-3,15],[-12,14],[-11,9],[-26,6],[-9,-13],[-5,-27],[-4,-28],[-4,-16],[-12,-11],[-14,-8],[-27,-5],[-11,4],[-19,17],[-9,3],[-13,-7],[-8,-16],[-5,-17],[-5,-10],[-56,-54],[-15,-25],[-5,-24],[-2,-26],[-4,-21],[-11,-9],[-26,-2],[-11,-8],[-11,-14],[-21,-87],[-16,-28],[-25,34],[2,22],[-1,9],[-1,7],[0,16],[-26,-55],[-29,-24],[-17,22],[9,84],[-37,-19],[-64,-119],[-101,-134],[-62,-123],[-17,30],[-98,-84],[-102,-31],[-288,-224],[-189,-62],[-31,3],[-81,88],[-20,14],[-22,26],[-31,61],[-27,71],[-13,54],[24,121],[61,117],[118,158],[76,139],[49,35],[79,112],[68,164],[43,39],[74,117],[7,22],[14,59],[6,21],[13,15],[18,13],[15,22],[7,46],[14,45],[91,97],[322,713],[321,712],[81,74],[204,399],[333,366],[177,116],[64,17],[22,15],[53,68],[261,167],[441,459],[23,41],[42,97],[35,35],[22,72],[15,16],[39,-28],[21,-4],[16,32],[0,11],[0,42],[18,27],[29,15],[28,22],[12,55],[14,31],[51,-2],[-3,39],[35,36],[20,35],[-4,25],[-42,10],[29,49],[130,80],[-4,15],[-2,15],[-3,11],[-8,12],[52,116],[14,74],[-13,74],[7,26],[32,-38],[10,46],[-5,162],[3,31],[8,40],[10,33],[9,14],[7,18],[15,116],[14,23],[10,-9],[6,3],[6,60],[-17,88],[-5,16],[-25,37],[1,86],[14,97],[14,71],[35,87],[51,63],[428,331],[47,71],[22,-19],[6,-64],[-19,-89],[-84,-220],[-9,-134],[-7,-44],[-7,-32],[-3,-33],[9,-51],[-12,-24],[-2,-29],[-1,-29],[-4,-20],[-13,-11],[-12,6],[-12,3],[-15,-24],[-12,-43],[-18,-113],[-14,-54],[14,-25],[7,18],[5,35],[9,24],[13,5],[26,-8],[14,3],[90,60],[44,67],[27,21],[23,38],[9,88],[5,76],[12,94],[29,159],[-14,56],[22,25],[53,24],[6,51],[12,278],[7,75],[18,35],[27,9],[32,0],[18,32],[3,72],[-6,80],[-11,54],[13,35],[16,20],[33,23],[-29,39],[-13,54],[-3,70],[1,88],[6,30],[15,39],[16,34],[25,32],[4,38],[1,45],[4,32],[26,31],[34,-4],[100,-50],[21,-57],[13,-77],[9,-78],[5,-27],[6,-25],[5,-32],[1,-50],[-3,-42],[-12,-84],[-2,-45],[-10,-54],[-207,-459],[-57,-78],[-19,-57],[-24,-121],[-18,-61],[8,1],[17,-2],[9,1],[-8,-65],[6,-49],[10,-51],[1,-69],[54,51],[-13,36],[6,38],[23,57],[5,-2],[7,-12],[8,-6],[7,20],[1,27],[-7,16],[-8,14],[-4,21],[5,65],[10,25],[12,13],[17,31],[30,126],[15,31],[8,-74],[17,-26],[23,9],[22,36],[6,22],[5,27],[7,23],[13,10],[32,1],[14,16],[12,35],[-28,60],[-12,104],[6,73],[24,-28],[11,-52],[5,-51],[10,-38],[24,-16],[5,19],[53,112],[-6,-46],[-22,-82],[-7,-55],[38,8],[29,61],[46,169],[58,143],[17,64],[0,37],[-7,38],[-6,59],[3,49],[11,117],[0,30],[-13,27],[-123,170],[-35,63],[-28,97],[15,68],[11,34],[2,34],[-10,73],[-26,115],[-3,57],[21,41],[6,-63],[15,-38],[19,-8],[20,28],[20,-26],[21,4],[20,20],[19,28],[12,24],[8,24],[9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