diff --git a/js/geocsv.js b/js/geocsv.js
index b7df3bf..1dfba8f 100644
--- a/js/geocsv.js
+++ b/js/geocsv.js
@@ -80,6 +80,12 @@ var GeoCSV = {
    * Methods related to locating and presenting data on the map
    */
   GIS: {
+    /**
+     * the relative or absolute URL of the place where map pin images may be
+     * fetched from.
+     */
+    iconUrlBase: "img/map-pins/",
+
     /**
      * Return an appropriate pin image name for this `record`.
      */
@@ -124,13 +130,13 @@ var GeoCSV = {
       if ( !isNaN( lat) && !isNaN( lng)) {
         var pin = L.icon( {iconAnchor: [16, 41],
                            iconSize: [32, 42],
-                           iconUrl: "img/map-pins/" +
+                           iconUrl: this.iconUrlBase +
                            this.pinImage( record) +
                            ".png",
                            riseOnHover: true,
                            shadowAnchor: [16, 23],
                            shadowSize: [57, 24],
-                           shadowUrl: "img/map-pins/shadow_pin.png"});
+                           shadowUrl: this.iconUrlBase + "shadow_pin.png"});
         var marker = L.marker( L.latLng( lat, lng),
                               {icon: pin, title: record["name"]});
         marker.bindPopup( this.popupContent( record));
@@ -184,8 +190,6 @@ var GeoCSV = {
           view.fitBounds( [[ maxLat, maxLng],
                            [ minLat, minLng]]);
         }
-        //return [ minLat + ( ( maxLat - minLat) / 2),
-        //        minLng + ( ( maxLng - minLng) / 2)];
       }
     },
 
@@ -315,5 +319,13 @@ var GeoCSV = {
         this.Notify.error( error);
       }
     }
+  },
+
+  /**
+   * Set the base address from which to serve icon (map pin) URLs to thia
+   * `iconUrlBase` value.
+   */
+  setIconUrlBase( iconUrlBase) {
+    this.GIS.iconUrlBase = String( iconUrlBase);
   }
 }
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..bd489a1
--- /dev/null
+++ b/package.json
@@ -0,0 +1,28 @@
+{
+  "name": "@simon_brooke/geocsv",
+  "version": "1.0.0",
+  "description": "An ultra-lightweight tool to show comma-separated value data on a map.",
+  "main": "js/geocsv.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/simon-brooke/geocsv-js.git"
+  },
+  "keywords": [
+    "CSV",
+    "map",
+    "GIS"
+  ],
+  "author": "Simon Brooke",
+  "license": "GPL-2.0-or-later",
+  "bugs": {
+    "url": "https://github.com/simon-brooke/geocsv-js/issues"
+  },
+  "homepage": "https://simon-brooke.github.io/geocsv-js/",
+  "dependencies": {
+    "leaflet": "^1.6.0",
+    "papaparse": "^5.1.1"
+  }
+}