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Show shapefile data by Leaflet

Geographic Information Systems Asked by Mohsen Sichani on August 7, 2021

I am trying to load a shapefile in Leaflet but no luck, It just loads the map. not sure what I am missing.

Here is the file:
http://data-atgis.opendata.arcgis.com/datasets/2ba102832e8b4d69a15e33e9a1c8d63a_0.zip

I have downloaded leadlet.shpfile.js, shp.js, catiline.js and saved them next to my HTML along with the shapefile as shown below.
enter image description here

and here is my HTML code

    <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8" />
  <title>Esri Leaflet Quickstart</title>
  <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />

  <!-- Load Leaflet from CDN -->
  <link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/leaflet.css"
    integrity="sha512-xodZBNTC5n17Xt2atTPuE1HxjVMSvLVW9ocqUKLsCC5CXdbqCmblAshOMAS6/keqq/sMZMZ19scR4PsZChSR7A=="
    crossorigin=""/>
  <script src="https://unpkg.com/[email protected]/dist/leaflet.js"
    integrity="sha512-XQoYMqMTK8LvdxXYG3nZ448hOEQiglfqkJs1NOQV44cWnUrBc8PkAOcXy20w0vlaXaVUearIOBhiXZ5V3ynxwA=="
    crossorigin=""></script>

  <!-- Load Esri Leaflet from CDN -->
  <script src="https://unpkg.com/[email protected]/dist/esri-leaflet.js"
    integrity="sha512-myckXhaJsP7Q7MZva03Tfme/MSF5a6HC2xryjAM4FxPLHGqlh5VALCbywHnzs2uPoF/4G/QVXyYDDSkp5nPfig=="
    crossorigin=""></script>
    <script type="text/javascript" src="https://code.jquery.com/jquery-2.1.3.min.js"></script>
    <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.3/leaflet.js" data-require="[email protected]" data-semver="0.7.3"></script>


  <style>
    body { margin:0; padding:0; }
    #map { position: absolute; top:0; bottom:0; right:0; left:0; }
  </style>
  <script src="AT_2.geojson" type="text/javascript"></script>
</head>
<body>

<div id="map"></div>
<script src="catiline.js"></script>
    <script src="leaflet.shpfile.js"></script>
    <script src="shp.js"></script>
<script>
var geo = L.geoJson({features:[]},{onEachFeature:function popUp(f,l){
            var out = [];
            if (f.properties){
                for(var key in f.properties){
                out.push(key+": "+f.properties[key]);
        }
        l.bindPopup(out.join("<br />"));
    }
    }});
    
  var map = L.map('map').setView([-36.833891798833903,174.830803391713999], 11)
  L.esri.basemapLayer('Topographic').addTo(map);

var base = 'AT_Infrastructure_Projects.zip';
        shp(base).then(function(data){
        geo.addData(data);
        }).addTo(map);;
  shpfile.addTo(map);
    shpfile.once("data:loaded", function() {
        console.log("finished loaded shapefile");
    });     
</script>

</body>
</html>

Since I need this map needs to be sent as an email attachment and js files are not allowed to be included as attachments, I have included those js files (catiline, shp,leaflet.shpfile.js) within tags.
but I am receiving this error
enter image description here

Seems the solution for the above are available here:

https://www.youtube.com/watch?v=nx8E5BF0XuE
and here
https://www.chromium.org/Home/chromium-security/extension-content-script-fetches/
but none of the suggested solutions in the video works for me as I need my user to just open the html.file without changing anything on their system.

leafletleaflet pluginsshapefile

One Answer

Your code seems like a mixture of examples from various sources that of course does not work together. There are several reasons why it does not work:

  • You have ages old //cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.3/leaflet.js Leaflet library reference at the end of references, which should go out.
  • GeoJSON layer geo is never added to the map.
  • .addTo(map) for shp(base) is wrong and shouldn't be there. Data is added to geo layer with geo.addData(data) statement.
  • References to shpfile layer should go out, since there is no such layer.

Your code should then look something like this:

var map = L.map('map').setView([-36.833891798833903,174.830803391713999], 11)
L.esri.basemapLayer('Topographic').addTo(map);

var geo = L.geoJson({features:[]}, {
  onEachFeature: function popUp(f, l) {
    var out = [];
    if (f.properties){
      for(var key in f.properties){
        out.push(key + ": " + f.properties[key]);
      }
      l.bindPopup(out.join("<br />"));
    }
  }
}).addTo(map);

var base = 'AT_Infrastructure_Projects.zip';
shp(base).then(function(data){
  geo.addData(data);
});

And this is the result:

enter image description here

Correct answer by TomazicM on August 7, 2021

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