base map - UD Spring 2024 - fleet's version
d3 = require("d3@6")
chart = {
const width = 960,
height = 900;
const svg = d3.create("svg")
.attr("viewBox", [50, 50, width-50, height-50]);
// Use Mercator projection
var projection = d3
.geoMercator()
.fitSize([width - 50, height - 50], bbox_01);
var path1 = d3.geoPath().projection(projection);
var path2 = d3.geoPath().projection(projection);
var path3 = d3.geoPath().projection(projection);
var path4 = d3.geoPath().projection(projection);
var g = svg.append("g").attr("id", "paths");
g.selectAll("path2") //d3 geopath
.data(helena_roads.features) //get data to define path
.enter() //there are more data than elements, this selects them
.append("path") //appends path to data
.attr('class','outlines')
.attr("d", path2) //The d attribute defines a path to be drawn, only applies to appended elements
.style("fill", "none")
.style('stroke-opacity','1')
.style("stroke-width", '.35')
.style("stroke", "rgb(0,0,0)")
g.selectAll("path3") //d3 geopath
.data(bldgs.features) //get data to define path
.enter() //there are more data than elements, this selects them
.append("path") //appends path to data
.attr('class','outlines')
.attr("d", path3) //The d attribute defines a path to be drawn, only applies to appended elements
.style("fill", "rgb(240,240,240)")
.style("fill-opacity", ".5")
.style('stroke-opacity','.4')
.style("stroke-width", '.5')
.style("stroke", "rgb(0,0,0)")
var c = svg.selectAll("circle") //d3 geopath
.data(subSts.features)
.enter() //there are more data than elements, this selects them
.append("circle") //appends path to data
.attr("cx", function(d) {return path1.centroid(d)[0]})
.attr("cy", function(d) {return path1.centroid(d)[1]})
.attr('r',3)
.attr('fill','black')
.style('fill-opacity','1')
return svg.node();
}
subSts = FileAttachment("sub_stops.geojson").json()
bldgs = FileAttachment("bldgs.geojson").json()
bbox = FileAttachment("site_boundary.geojson").json()
subLns = FileAttachment("subway_lines.geojson").json()
bbox_01 = FileAttachment("bbox_01.geojson").json()
helena_roads = FileAttachment("helena_roads_01.geojson").json()
trails = FileAttachment("trails.geojson").json()
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