Add Maryland DOT cameras

layers/dot-cams/md/get_data.py

@@ -0,0 +1,74 @@
+#!/usr/bin/python3
+
+import requests
+import json
+
+cameras = []
+
+res = requests.get("https://chartexp1.sha.maryland.gov/CHARTExportClientService/getCameraMapDataJSON.do")
+res.raise_for_status()
+# {
+#   "error": null,
+#   "data": [
+#     {
+#       "description": "I-270 & Old Hundred Rd (MD 109)(CAM 165)",
+#       "lat": 39.2773,
+#       "lon": -77.3236,
+#       "cctvIp": "strmr5.sha.maryland.gov",
+#       "milePost": 22.27,
+#       "cameraCategories": [
+#         "Wash. DC"
+#       ],
+#       "routeNumber": 270,
+#       "commMode": "ONLINE",
+#       "routePrefix": "IS",
+#       "routeSuffix": "",
+#       "opStatus": "OK",
+#       "publicVideoURL": "https://chart.maryland.gov/Video/GetVideo/7a00a1dc01250075004d823633235daa",
+#       "lastCachedDataUpdateTime": 1706950514352,
+#       "name": "I-270 & Old Hundred Rd (MD 109)",
+#       "id": "7a00a1dc01250075004d823633235daa"
+#     },
+
+for c in res.json()['data']:
+    try:
+        # # 50-ish are marginal; let's ignore that and put 'em on the map anyway
+        # if not c['commMode'] == "ONLINE":
+        #     print("warn: camera offline; ignoring:", c)
+        #     continue
+        # if not c['opStatus'] == "OK":
+        #     print("warn: camera not ok; ignoring:", c)
+        #     continue
+        cameras.append({
+            "type": "Feature",
+            "geometry": {
+                "type": "Point",
+                "coordinates": [c['lon'], c['lat']], # yes, [lon, lat] since it's [x, y]
+            },
+            "properties": {
+                "name": c['description'],
+                "views": [
+                    {
+                        'hasVideo': True,
+                        'src': f"https://{c['cctvIp']}/rtplive/{c['id']}/playlist.m3u8",
+                    },
+                    # {
+                    #     'hasVideo': False,
+                    #     'src': c['imageUrl'],
+                    # }
+                ]
+            },
+        })
+    except Exception as e:
+        print(c)
+        raise e
+
+geojson = {
+    "type": "FeatureCollection",
+    "features": cameras,
+}
+
+with open("data.geojson", "w") as f:
+    f.write(json.dumps(geojson))
+
+print(f"{len(cameras)} locations found")