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我有一個代碼,需要一個谷歌地圖,並上傳一個D3層,它在V3和它的工作正常。現在我需要將其轉移到V4,它給了我一個錯誤: 「遺漏的類型錯誤:r是不是一個函數」 下面的代碼被轉移後,到V4d3從v3翻譯到v4
<body>
<div id="map"></div>
<script>
var map = new google.maps.Map(d3.select("#map").node(), {
zoom: 7,
center: new google.maps.LatLng(31.5852,36.2384),
mapTypeId: google.maps.MapTypeId.ROADMAP,
styles: [
{elementType: 'geometry', stylers: [{color: "#212121"}]},
{elementType: 'labels.text.stroke', stylers: [{color: '#242f3e'}]},
{elementType: 'labels.text.fill', stylers: [{color: '#746855'}]},
]
});
d3.json("Export_Output_6_modified.json", function(error, jordanLevel2) {
if (error) throw error
//console.log(data[0].comuni[0].geometry.coordinates);
var overlay = new google.maps.OverlayView();
overlay.onAdd = function() {
var layer = d3.select(this.getPanes().overlayLayer).append("div");//.attr("height",1000)
overlay.draw = function() {
layer.select('svg').remove();
var w = 900;
var h = 900;
var color = ['#e41a1c', '#377eb8', '#4daf4a', '#984ea3', '#ff7f00', '#ffff33', '#a65628', '#f781bf', '#999999'];
var heat_color = d3.scaleLinear().domain([0, 1]).range(['#b2df8a', '#ff7f00']).interpolate(d3.interpolateHcl);
var overlayProjection = this.getProjection();
// Turn the overlay projection into a d3 projection
var googleMapProjection = function(coordinates) {
var googleCoordinates = new google.maps.LatLng(coordinates[1], coordinates[0]);
var pixelCoordinates = overlayProjection.fromLatLngToDivPixel(googleCoordinates);
return [pixelCoordinates.x, pixelCoordinates.y];
}
var path = d3.geoPath().projection(googleMapProjection);
var svg = layer.append("svg")
.attr('width', w)
.attr('height', h)
var g = svg.append('g')
.attr("id", "mapGroup");
//I believe the problem is here....
g.selectAll(".path")
.data(jordanLevel2.features)
.enter()
.append("path")
.attr("d", path)
.attr('class', 'state selected')
.style("fill", function(d, i) {
return color[i % color.length];
})
.style('opacity', .7);
}
}
overlay.setMap(map);
});
</script>
</body>
是的我知道,但在另一方面,我需要翻譯具體的方面。 我閱讀演示文稿它必須從投影轉換爲geoProjection,但也出現錯誤 – DANAA