Add waterway tunnels

Author: jirik

style.json

@@ -310,6 +310,53 @@
         "fill-opacity": 0.8
       }
     },
+    {
+      "id": "waterway-tunnel",
+      "type": "line",
+      "metadata": {
+        "mapbox:group": "1444849382550.77"
+      },
+      "source": "openmaptiles",
+      "source-layer": "waterway",
+      "filter": [
+        "all",
+        [
+          "in",
+          "class",
+          "canal",
+          "river",
+          "stream"
+        ],
+        [
+          "==",
+          "brunnel",
+          "tunnel"
+        ]
+      ],
+      "layout": {
+        "line-cap": "round"
+      },
+      "paint": {
+        "line-color": "#a0c8f0",
+        "line-width": {
+          "base": 1.2,
+          "stops": [
+            [
+              10,
+              0.5
+            ],
+            [
+              20,
+              2
+            ]
+          ]
+        },
+        "line-dasharray": [
+          2,
+          4
+        ]
+      }
+    },
     {
       "id": "waterway-other",
       "type": "line",
@@ -354,10 +401,18 @@
       "source": "openmaptiles",
       "source-layer": "waterway",
       "filter": [
-        "in",
-        "class",
-        "canal",
-        "stream"
+        "all",
+        [
+          "in",
+          "class",
+          "canal",
+          "stream"
+        ],
+        [
+          "!=",
+          "brunnel",
+          "tunnel"
+        ]
       ],
       "layout": {
         "line-cap": "round"
@@ -388,9 +443,17 @@
       "source": "openmaptiles",
       "source-layer": "waterway",
       "filter": [
-        "==",
-        "class",
-        "river"
+        "all",
+        [
+          "==",
+          "class",
+          "river"
+        ],
+        [
+          "!=",
+          "brunnel",
+          "tunnel"
+        ]
       ],
       "layout": {
         "line-cap": "round"