vector tiles plus plotted coordinates

A map of some trees in Fort Greene Park, showing Mapbox vector tiles in the background, with tree coordinates plotted on top. Tree coordinates are loaded in with data(). Tree location data gathered by me. I used Mike Bostock's vector tile example as a starting point.

<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  margin: 0;
}

#container {
  position: relative;
  overflow: hidden;
	background: #35363b;
}

#map{
	width:100%;
	height:100%;
}

#points{
	width:100%;
	height:100%;
	position:relative;
	z-index:100;
}

.layer {
  position: absolute;
}

.tile {
  pointer-events: none;
  position: absolute;
  width: 256px;
  height: 256px;
}

.info {
  position: absolute;
  bottom: 0px;
  left: 0px;
	padding: 20px;
	background: #000;
	color: #fff;
	width: 100%;
	z-index: 1000;
}

</style>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script src="https://d3js.org/d3.geo.tile.v0.min.js"></script>
<script>

var width = Math.max(960, window.innerWidth),
    height = Math.max(500, window.innerHeight),
    prefix = prefixMatch(["webkit", "ms", "Moz", "O"]);

d3.csv("ftgreenetrees.csv", function(error, dataset) { createMap(dataset) });

var tile = d3.geo.tile()
    .size([width, height]);

var projection = d3.geo.mercator()
.scale((1 << 25) / 2 / Math.PI)
.translate([-width / 2, -height / 2]); // just temporary

var zoom = d3.behavior.zoom()
    .scale(projection.scale() * 2 * Math.PI)
    .scaleExtent([1 << 9, 1 << 25])
    .translate(projection([-73.975536, 40.691674]).map(function(x) { return -x; }))
    .on("zoom", zoomed);

var container = d3.select("body").append("div")
    .attr("id", "container")
    .style("width", width + "px")
    .style("height", height + "px")
    .call(zoom)
    .on("mousemove", mousemoved);

var map = container.append("g")
		.attr("id", "map")

var points = container.append("svg")
		.attr("id", "points")
				
var layer = map.append("div")
    .attr("class", "layer");

var info = map.append("div")
    .attr("class", "info");

zoomed();

function createMap(dataset) {
	d3.select("#points").selectAll("circle").data(dataset) //plotted 	locations on map
	.enter()
	.append("circle")
	.style("fill", "#14e6b7")
	.style("opacity", 0.7)
	.attr("r", 8)
	.attr("cx", function(d) {return projection([d.y,d.x])[0]})
	.attr("cy", function(d) {return projection([d.y,d.x])[1]})
	zoomed();
}

function zoomed() {
  var tiles = tile
      .scale(zoom.scale())
      .translate(zoom.translate())
      ();

projection
      .scale(zoom.scale() / 2 / Math.PI)
      .translate(zoom.translate());

d3.selectAll("circle")
			.attr("cx", function(d) {return projection([d.y,d.x])[0]})
			.attr("cy", function(d) {return projection([d.y,d.x])[1]})

var image = layer
      .style(prefix + "transform", matrix3d(tiles.scale, tiles.translate))
    .selectAll(".tile")
      .data(tiles, function(d) { return d; });

image.exit()
      .remove();

image.enter().append("img")
      .attr("class", "tile")
      .attr("src", function(d) { return "https://" + ["a", "b", "c", "d"][Math.random() * 4 | 0] + ".tiles.mapbox.com/v3/jhubley.kllla0l7/" + d[2] + "/" + d[0] + "/" + d[1] + ".png"; })
      .style("left", function(d) { return (d[0] << 8) + "px"; })
      .style("top", function(d) { return (d[1] << 8) + "px"; });
}

function mousemoved() {
  info.text(formatLocation(projection.invert(d3.mouse(this)), zoom.scale()));
}

function matrix3d(scale, translate) {
  var k = scale / 256, r = scale % 1 ? Number : Math.round;
  return "matrix3d(" + [k, 0, 0, 0, 0, k, 0, 0, 0, 0, k, 0, r(translate[0] * scale), r(translate[1] * scale), 0, 1 ] + ")";
}

function prefixMatch(p) {
  var i = -1, n = p.length, s = document.body.style;
  while (++i < n) if (p[i] + "Transform" in s) return "-" + p[i].toLowerCase() + "-";
  return "";
}

function formatLocation(p, k) {
  var format = d3.format("." + Math.floor(Math.log(k) / 2 - 2) + "f");
  return (p[1] < 0 ? format(-p[1]) + "°S" : format(p[1]) + "°N") + " "
       + (p[0] < 0 ? format(-p[0]) + "°W" : format(p[0]) + "°E");
}

</script>
</body>
</html>

Modified http://d3js.org/d3.v3.min.js to a secure url

Modified http://d3js.org/d3.geo.tile.v0.min.js to a secure url

https://d3js.org/d3.v3.min.js

https://d3js.org/d3.geo.tile.v0.min.js