Add US state highway svg icons from wikipedia

LICENSE.md

@@ -32,12 +32,15 @@ U.S. Interstate shields come from [Wikipedia][wikipedia_us_interstate] and are i
 
 U.S. Highway shields come from [Wikipedia][wikipedia_us_highway] and are in the public domain.
 
+U.S. State Highway shields come from [Wikipedia][wikipedia_us_state] and are in the public domain.
+
 Canada Transcanada shields come from [Wikipedia][wikipedia_ca_transcanada] and are in the public domain.
 
 GB motorway shields come from [Wikipedia][wikipedia_gb_motorway] and are in the public domain.
 
 [wikipedia_us_interstate]: https://commons.m.wikimedia.org/wiki/Category:Interstate_Highway_shield_blanks
 [wikipedia_us_highway]: https://commons.m.wikimedia.org/wiki/Category:US_Highway_shield_blanks
+[wikipedia_us_state]: https://commons.wikimedia.org/wiki/Category:Circle_shield_blanks
 [wikipedia_ca_transcanada]: https://commons.wikimedia.org/wiki/File:TCH_blank.svg
 [wikipedia_gb_motorway]: https://commons.wikimedia.org/wiki/File:Road_marker_UK_A2.svg
 

style.json

@@ -1578,6 +1578,31 @@
       },
       "paint": {"text-color": "#000"}
     },
+    {
+      "id": "road_shield_gb-motorway-3",
+      "type": "symbol",
+      "source": "openmaptiles",
+      "source-layer": "transportation_name",
+      "minzoom": 7,
+      "filter": [
+        "all",
+        ["<=", "ref_length", 3],
+        ["in", "network", "gb-motorway"]
+      ],
+      "layout": {
+        "icon-image": "{network}_3",
+        "icon-rotation-alignment": "viewport",
+        "symbol-placement": {"base": 1, "stops": [[10, "point"], [11, "line"]]},
+        "symbol-spacing": 500,
+        "text-field": "{ref}",
+        "text-font": ["Roboto Regular"],
+        "text-offset": [0, 0.2],
+        "text-rotation-alignment": "viewport",
+        "text-size": 10,
+        "icon-size": 0.8
+      },
+      "paint": {"text-color": "#fff"}
+    },
     {
       "id": "road_shield",
       "type": "symbol",
@@ -1587,7 +1612,14 @@
       "filter": [
         "all",
         ["<=", "ref_length", 6],
-        ["!in", "network", "us-interstate", "us-highway", "ca-transcanada"]
+        [
+          "!in",
+          "network",
+          "us-interstate",
+          "us-highway",
+          "ca-transcanada",
+          "gb-motorway"
+        ]
       ],
       "layout": {
         "icon-image": "default_{ref_length}",

svgs/svgs_not_in_iconset/us-state_2.svg

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg
+	xmlns="http://www.w3.org/2000/svg"
+	version="1.1"
+	width="600"
+	height="600">
+<rect
+	width="600"
+	height="600"
+	rx="37.5"
+	ry="37.5"
+	style="fill:#000;fill-opacity:1;stroke:none"/>
+<circle
+	r="287.5"
+	cx="300"
+	cy="300"
+	style="fill:#fff;fill-opacity:1;stroke:none"/>
+</svg>

svgs/svgs_not_in_iconset/us-state_3.svg

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg
+	xmlns="http://www.w3.org/2000/svg"
+	version="1.1"
+	width="750"
+	height="600">
+<rect
+	width="750"
+	height="600"
+	rx="37.5"
+	ry="37.5"
+	style="fill:#000;fill-opacity:1;stroke:none"/>
+<ellipse
+	rx="362.5"
+	ry="287.5"
+	cx="375"
+	cy="300"
+	style="fill:#fff;fill-opacity:1;stroke:none"/>
+</svg>