Update Buildings.html

Improve expression for better performance and clarity.

Author: rbrundritt

Samples/PMTiles/Overture Building Theme/Buildings.html

@@ -150,34 +150,26 @@
             height: ["get", "height"],
             fillOpacity: 0.5,
             fillColor: [
-              "case",
-              ['==', ['get', 'subtype'], 'agricultural'],
-              "wheat",
-              ['==', ['get', 'subtype'], 'civic'],
-              "teal",
-              ['==', ['get', 'subtype'], 'commercial'],
-              "blue",
-              ['==', ['get', 'subtype'], 'education'],
-              "aqua",
-              ['==', ['get', 'subtype'], 'entertainment'],
-              "pink",
-              ['==', ['get', 'subtype'], 'industrial'],
-              "yellow",
-              ['==', ['get', 'subtype'], 'medical'],
-              "red",
-              ['==', ['get', 'subtype'], 'military'],
-              "darkgreen",
-              ['==', ['get', 'subtype'], 'outbuilding'],
-              "white",
-              ['==', ['get', 'subtype'], 'religious'],
-              "khaki",
-              ['==', ['get', 'subtype'], 'residential'],
-              "green",
-              ['==', ['get', 'subtype'], 'service'],
-              "gold",
-              ['==', ['get', 'subtype'], 'transportation'],
-              "orange",
-              "grey",
+                "match",
+
+                ["get", "subtype"],
+
+                "agricultural", "wheat",
+                "civic", "teal",
+                "commercial", "blue",
+                "education", "aqua",
+                "entertainment", "pink",
+                "industrial", "yellow",
+                "medical", "red",
+                "military", "darkgreen",
+                "outbuilding", "white",
+                "religious", "khaki",
+                "residential", "green",
+                "service", "gold",
+                "transportation", "orange",
+
+                //Default color.
+                "grey"
             ],
             filter: ['any', ['==', ['geometry-type'], 'Polygon'], ['==', ['geometry-type'], 'MultiPolygon']]
           }