diff --git a/docs/files/pc4-globe.html b/docs/files/pc4-globe.html
new file mode 100644
index 00000000..064f53f9
--- /dev/null
+++ b/docs/files/pc4-globe.html
@@ -0,0 +1,177 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+    <meta charset="utf-8" />
+    <title>World Pluscodes 4</title>
+    <link rel="stylesheet" href="https://js.arcgis.com/4.24/esri/themes/light/main.css" />
+    <style>
+        html,
+        body,
+        #viewDiv {
+            padding: 0;
+            margin: 0;
+            height: 100%;
+            width: 100%;
+        }
+    </style>
+</head>
+
+<body>
+    <div id="viewDiv"></div>
+
+    <script src="https://js.arcgis.com/4.24/"></script>
+    <script>
+        require([
+            "esri/Map",
+            "esri/views/MapView",
+            "esri/layers/GeoJSONLayer",
+            "esri/symbols/TextSymbol",
+            "esri/layers/support/LabelClass",
+            "esri/widgets/Search",
+            "esri/symbols/SimpleLineSymbol",
+            "dojo/domReady!"
+        ], function (Map, MapView, GeoJSONLayer, TextSymbol, LabelClass, Search, SimpleLineSymbol) {
+            // Create the map
+            var map = new Map({
+                basemap: "streets-vector",
+            });
+
+            // Create the map view
+            var view = new MapView({
+                container: "viewDiv",
+                map: map,
+                center: [-97, 40],
+                // scale: 5000000
+                zoom: 4
+            });
+
+            // Define the GeoJSON layer
+            var pc4_layer = new GeoJSONLayer({
+                // url: "../data_files/world_pc4.geojson",
+                url: "https://atmamani.github.io/files/world_pc4.geojson",
+                // url: "http://127.0.0.1:8000/files/world_pc4.geojson",
+                renderer: {
+                    type: "simple",
+                    symbol: {
+                        type: "simple-fill",
+                        color: [0, 0, 0, 0],
+                        outline: {
+                            color: "brown",
+                            width: 1.25
+                        }
+                    }
+                },
+                labelingInfo: [new LabelClass({
+                    labelExpressionInfo: { expression: "$feature.trimmed_pl" },
+                    symbol: {
+                        type: "text",
+                        color: "black",
+                        haloColor: "white",
+                        haloSize: "1px",
+                        font: {
+                            size: "13px",
+                            weight: "bold"
+                        }
+                    },
+                    labelPlacement: "always-horizontal"
+                })]
+            });
+
+            //Define PC2 layer
+            var pc2_layer = new GeoJSONLayer({
+                url: "https://atmamani.github.io/files/world_pc_len2.geojson",
+                renderer: {
+                    type: "simple",
+                    symbol: {
+                        type: "simple-fill",
+                        color: [0, 0, 0, 0.15],
+                        outline: {
+                            color: "green",
+                            width: 4
+                        }
+                    }
+                },
+                labelingInfo: [new LabelClass({
+                    labelExpressionInfo: { expression: "$feature.trimmed_pluscodes" },
+                    symbol: new TextSymbol({
+                        color: "red",
+                        haloColor: "black",
+                        haloSize: "2px",
+                        font: {
+                            size: "16px",
+                            weight: "bold"
+                        }
+                    }),
+                    labelPlacement: "always-horizontal"
+                })]
+            });
+
+            // Add the GeoJSON layer to the map
+            map.add(pc4_layer);
+            map.add(pc2_layer);
+
+            //Search widget
+            const searchWidget = new Search({
+                view: view,
+                allPlaceholder: "PC4 or PC2",
+                includeDefaultSources: false,
+                sources: [
+                    // primary search source is the PC4 layer
+                    {
+                        layer: pc4_layer,
+                        searchFields: ['trimmed_pl'],
+                        displayField: 'trimmed_pl',
+                        exactMatch: true,
+                        outFields: ["trimmed_pl"],
+                        placeholder: "PC4 or PC2 eg:76VV"
+
+                    },
+                    // Add AGS World Geocoding Service as a search source
+                    {
+                        name: "ArcGIS World Geocoding Service",
+                        url: "https://geocode.arcgis.com/arcgis/rest/services/World/GeocodeServer",
+                        singleLineFieldName: "SingleLine",
+                    }
+                ]
+            });
+
+            // Earlier , I had another search widget for geocoding. Now I have consolidated both into one.
+            // const geocodeWidget = new Search({
+            // view: view,
+            // allPlaceholder: "Address",
+            // sources: [{
+            //     name: "ArcGIS World Geocoding Service",
+            //     url: "https://geocode-api.arcgis.com/arcgis/rest/services/World/GeocodeServer", 
+            //     // locator: new Locator({ url: "https://geocode-api.arcgis.com/arcgis/rest/services/World/GeocodeServer" }),
+            //     singleLineFieldName: "SingleLine",
+            //     placeholder: "Search for Addresses",
+            //     // maxResults: 3,
+            //     // maxSuggestions: 6,
+            //     // suggestionsEnabled: true,
+            //     // minSuggestCharacters: 0
+            // }]
+        });
+
+            // Add the search widget to the top right corner of the view
+            view.ui.add(searchWidget, {
+                position: "top-right"
+            });
+            // Commented out - earlier there were two search bars. Now they are consolidated into one.
+            // view.ui.add(geocodeWidget, {
+            //     position: "top-right",
+            //     index: 2
+            // });
+
+            // Bind the browser find keyboard shortcut to the search widget
+            document.addEventListener("keydown", function (event) {
+                if ((event.ctrlKey || event.metaKey) && event.key === "f") {
+                    event.preventDefault();
+                    searchWidget.focus();
+                }
+            });
+        });
+    </script>
+</body>
+
+</html>
\ No newline at end of file
diff --git a/docs/projects/ml/gradient-descent-in-python/index.html b/docs/projects/ml/gradient-descent-in-python/index.html
index 5784f13c..424b3205 100644
--- a/docs/projects/ml/gradient-descent-in-python/index.html
+++ b/docs/projects/ml/gradient-descent-in-python/index.html
@@ -4254,9 +4254,9 @@ <h2 id="plot-gradient-descent">Plot Gradient Descent<a class="anchor-link" href=
 <div class="jp-OutputArea jp-Cell-outputArea">
 <div class="jp-OutputArea-child">
 <div class="jp-OutputPrompt jp-OutputArea-prompt"></div>
-<div class="jp-RenderedJavaScript jp-OutputArea-output" data-mime-type="application/javascript" id="2f5fb5ae-f6e5-4a1e-aa07-04106a560cd6" tabindex="0">
+<div class="jp-RenderedJavaScript jp-OutputArea-output" data-mime-type="application/javascript" id="9b35e8e7-eb43-43bf-8405-0d7682207035" tabindex="0">
 <script type="text/javascript">
-var element = document.getElementById('2f5fb5ae-f6e5-4a1e-aa07-04106a560cd6');
+var element = document.getElementById('9b35e8e7-eb43-43bf-8405-0d7682207035');
 /* Put everything inside the global mpl namespace */
 window.mpl = {};
 
@@ -5303,9 +5303,9 @@ <h3 id="visualize-loss-function-as-contours">Visualize loss function as contours
 <div class="jp-OutputArea jp-Cell-outputArea">
 <div class="jp-OutputArea-child">
 <div class="jp-OutputPrompt jp-OutputArea-prompt"></div>
-<div class="jp-RenderedJavaScript jp-OutputArea-output" data-mime-type="application/javascript" id="9fc44bf1-5b8e-451b-84c5-c99fba6d1086" tabindex="0">
+<div class="jp-RenderedJavaScript jp-OutputArea-output" data-mime-type="application/javascript" id="3cb0ba1e-231a-45f0-9c6a-024bab41250c" tabindex="0">
 <script type="text/javascript">
-var element = document.getElementById('9fc44bf1-5b8e-451b-84c5-c99fba6d1086');
+var element = document.getElementById('3cb0ba1e-231a-45f0-9c6a-024bab41250c');
 /* Put everything inside the global mpl namespace */
 window.mpl = {};
 
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index 4dd31b9f..cbb42017 100644
--- a/docs/sitemap.xml
+++ b/docs/sitemap.xml
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     <url>
          <loc>https://atmamani.github.io/</loc>
-         <lastmod>2024-01-11</lastmod>
+         <lastmod>2024-01-12</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://atmamani.github.io/sql-1/</loc>
-         <lastmod>2024-01-11</lastmod>
+         <lastmod>2024-01-12</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://atmamani.github.io/apps/</loc>
-         <lastmod>2024-01-11</lastmod>
+         <lastmod>2024-01-12</lastmod>
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     </url>
     <url>
          <loc>https://atmamani.github.io/apps/firemap/</loc>
-         <lastmod>2024-01-11</lastmod>
+         <lastmod>2024-01-12</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://atmamani.github.io/apps/flask-notes/</loc>
-         <lastmod>2024-01-11</lastmod>
+         <lastmod>2024-01-12</lastmod>
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     </url>
     <url>
          <loc>https://atmamani.github.io/apps/fullstack-python-webapp-1/</loc>
-         <lastmod>2024-01-11</lastmod>
+         <lastmod>2024-01-12</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://atmamani.github.io/apps/quakemap/</loc>
-         <lastmod>2024-01-11</lastmod>
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     </url>
     <url>
          <loc>https://atmamani.github.io/apps/usa-pluscodes/</loc>
-         <lastmod>2024-01-11</lastmod>
+         <lastmod>2024-01-12</lastmod>
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     </url>
     <url>
          <loc>https://atmamani.github.io/apps/wildfire-hazard/</loc>
-         <lastmod>2024-01-11</lastmod>
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     </url>
     <url>
          <loc>https://atmamani.github.io/blog/</loc>
-         <lastmod>2024-01-11</lastmod>
+         <lastmod>2024-01-12</lastmod>
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          <loc>https://atmamani.github.io/blog/2017/10/26/a-whole-new-way-to-experience-gis/</loc>
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     <url>
          <loc>https://atmamani.github.io/blog/2010/01/26/articles-on-remote-sensing/</loc>
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     <url>
          <loc>https://atmamani.github.io/blog/2020/06/02/aws-lambda-functions-quickstart/</loc>
-         <lastmod>2024-01-11</lastmod>
+         <lastmod>2024-01-12</lastmod>
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          <loc>https://atmamani.github.io/blog/2021/09/20/aws-lambda-functions-with-docker-images/</loc>
-         <lastmod>2024-01-11</lastmod>
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          <loc>https://atmamani.github.io/blog/2020/06/18/aws-lambda-functions-with-sam-cli/</loc>
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          <loc>https://atmamani.github.io/blog/2018/02/26/building-data-science-projects-using-azure-ml-stack/</loc>
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          <loc>https://atmamani.github.io/blog/2019/10/20/building-restful-apis-with-flask-in-python/</loc>
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          <loc>https://atmamani.github.io/blog/2018/12/04/coding-standards-for-jupyter-notebooks/</loc>
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     <url>
          <loc>https://atmamani.github.io/blog/2017/07/20/devops-today/</loc>
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          <loc>https://atmamani.github.io/blog/2021/02/04/embedding-maps-in-photos/</loc>
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+    <div id="viewDiv"></div>
+
+    <script src="https://js.arcgis.com/4.24/"></script>
+    <script>
+        require([
+            "esri/Map",
+            "esri/views/MapView",
+            "esri/layers/GeoJSONLayer",
+            "esri/symbols/TextSymbol",
+            "esri/layers/support/LabelClass",
+            "esri/widgets/Search",
+            "esri/symbols/SimpleLineSymbol",
+            "dojo/domReady!"
+        ], function (Map, MapView, GeoJSONLayer, TextSymbol, LabelClass, Search, SimpleLineSymbol) {
+            // Create the map
+            var map = new Map({
+                basemap: "streets-vector",
+            });
+
+            // Create the map view
+            var view = new MapView({
+                container: "viewDiv",
+                map: map,
+                center: [-97, 40],
+                // scale: 5000000
+                zoom: 4
+            });
+
+            // Define the GeoJSON layer
+            var pc4_layer = new GeoJSONLayer({
+                // url: "../data_files/world_pc4.geojson",
+                url: "https://atmamani.github.io/files/world_pc4.geojson",
+                // url: "http://127.0.0.1:8000/files/world_pc4.geojson",
+                renderer: {
+                    type: "simple",
+                    symbol: {
+                        type: "simple-fill",
+                        color: [0, 0, 0, 0],
+                        outline: {
+                            color: "brown",
+                            width: 1.25
+                        }
+                    }
+                },
+                labelingInfo: [new LabelClass({
+                    labelExpressionInfo: { expression: "$feature.trimmed_pl" },
+                    symbol: {
+                        type: "text",
+                        color: "black",
+                        haloColor: "white",
+                        haloSize: "1px",
+                        font: {
+                            size: "13px",
+                            weight: "bold"
+                        }
+                    },
+                    labelPlacement: "always-horizontal"
+                })]
+            });
+
+            //Define PC2 layer
+            var pc2_layer = new GeoJSONLayer({
+                url: "https://atmamani.github.io/files/world_pc_len2.geojson",
+                renderer: {
+                    type: "simple",
+                    symbol: {
+                        type: "simple-fill",
+                        color: [0, 0, 0, 0.15],
+                        outline: {
+                            color: "green",
+                            width: 4
+                        }
+                    }
+                },
+                labelingInfo: [new LabelClass({
+                    labelExpressionInfo: { expression: "$feature.trimmed_pluscodes" },
+                    symbol: new TextSymbol({
+                        color: "red",
+                        haloColor: "black",
+                        haloSize: "2px",
+                        font: {
+                            size: "16px",
+                            weight: "bold"
+                        }
+                    }),
+                    labelPlacement: "always-horizontal"
+                })]
+            });
+
+            // Add the GeoJSON layer to the map
+            map.add(pc4_layer);
+            map.add(pc2_layer);
+
+            //Search widget
+            const searchWidget = new Search({
+                view: view,
+                allPlaceholder: "PC4 or PC2",
+                includeDefaultSources: false,
+                sources: [
+                    // primary search source is the PC4 layer
+                    {
+                        layer: pc4_layer,
+                        searchFields: ['trimmed_pl'],
+                        displayField: 'trimmed_pl',
+                        exactMatch: true,
+                        outFields: ["trimmed_pl"],
+                        placeholder: "PC4 or PC2 eg:76VV"
+
+                    },
+                    // Add AGS World Geocoding Service as a search source
+                    {
+                        name: "ArcGIS World Geocoding Service",
+                        url: "https://geocode.arcgis.com/arcgis/rest/services/World/GeocodeServer",
+                        singleLineFieldName: "SingleLine",
+                    }
+                ]
+            });
+
+            // Earlier , I had another search widget for geocoding. Now I have consolidated both into one.
+            // const geocodeWidget = new Search({
+            // view: view,
+            // allPlaceholder: "Address",
+            // sources: [{
+            //     name: "ArcGIS World Geocoding Service",
+            //     url: "https://geocode-api.arcgis.com/arcgis/rest/services/World/GeocodeServer", 
+            //     // locator: new Locator({ url: "https://geocode-api.arcgis.com/arcgis/rest/services/World/GeocodeServer" }),
+            //     singleLineFieldName: "SingleLine",
+            //     placeholder: "Search for Addresses",
+            //     // maxResults: 3,
+            //     // maxSuggestions: 6,
+            //     // suggestionsEnabled: true,
+            //     // minSuggestCharacters: 0
+            // }]
+        });
+
+            // Add the search widget to the top right corner of the view
+            view.ui.add(searchWidget, {
+                position: "top-right"
+            });
+            // Commented out - earlier there were two search bars. Now they are consolidated into one.
+            // view.ui.add(geocodeWidget, {
+            //     position: "top-right",
+            //     index: 2
+            // });
+
+            // Bind the browser find keyboard shortcut to the search widget
+            document.addEventListener("keydown", function (event) {
+                if ((event.ctrlKey || event.metaKey) && event.key === "f") {
+                    event.preventDefault();
+                    searchWidget.focus();
+                }
+            });
+        });
+    </script>
+</body>
+
+</html>
\ No newline at end of file
