How to display coordinates on worldmap to track the position of UAV

General
1

Hello all,
I have been working on a project where I have to display/track the coordinates of a UAV on worldmap, so far I was able to display the icon with the MQTT Topic but I am stuck now as I get an error when I want to loop through the coordinates and display them on the Worldmap and it does not seem to work? I am posting my code here:

var payload = msg.payload;
var topic = msg.topic;
//var lat = msg.lattitude;
//var lon = msg.longitude;
var name = msg.name;
msg.name = 'SIMULU';

var coordinates = {
    'x': [51.68,0],
    'y': [0,8.02]
}

if(topic == "gas/uas/0xWINKELBRUNN/gas_cmds/flight_state"){
    msg.navigation = "flight";
    msg.indicator_color = payload;
    return msg;
}

if(topic == "gas/uas/0xWINKELBRUNN/gas_cmds/guidance/geofence/dir"){
    msg.navigation = "flight";
    msg.indicator_color = "red";
    msg.direction = parseFloat(payload).toFixed(2);
    for(var i=0;i<Object.keys(coordinates).length;i++){
        msg.payload = {
            'name': msg.name +i.toString(),
            'lat': coordinates[i].x,
            'lon': coordinates[i].y,
            'icon': 'fa-plane',
            'iconColor': 'blue',
            'layer': 'dir'
        }
        node.send(msg);

    }
    return msg; 
    
}
if(topic != "gas/uas/0xWINJKELBRUNN/gas_cmds/guidance/geofence/dir"){
    msg.payload = {
        name : msg.name,
        deleted : true,
        command : {
            clear : 'dir'
        }
    }
}

I get the following error: "TyperError: Cannot read property 'lat' of undefined". Any help or suggestion in this regard would be great. Thank you.

2

coordinates is an object, so should that not be
'lat': coordinates.x[i],

1 Like
3

Hi @E1cid,
Thank you for the reply. I will try this too.

Just one question: Will my code above show the icon moving in the maps and track different values given by coordiantes object?

4

Hi @E1cid ,
The following is my flow in which I am trying to track the position of the UAV and also making a track line with it but it does not seems to draw/make a line in the maps ? I want to have multiple coordinates so that the UAV completes a flight path/track, can you see what I am doing wrong here?
Thank you.

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    {
        "id": "6a1a72128b6a3842",
        "type": "tab",
        "label": "User_Interface_SIMULU",
        "disabled": false,
        "info": "",
        "env": []
    },
    {
        "id": "ef044715988c5a66",
        "type": "function",
        "z": "6a1a72128b6a3842",
        "name": "Style Gauge",
        "func": "var msg1 = {}; \nvar msg2 = {}; \n\nvar circleColor = msg.indicator_color;        \nvar textColor = \"white\"; \n\n\nmsg1.ui_control = \n{   \"gtype\": \"compass\",\n    \"options\":{\n        \"gaugeColor\": circleColor, \n        \"levelColors\": [\"red\",\"blue\",\"yellow\"],\n        \"hideValue\": false,\n        \"textColor\": textColor,\n        \"gaugeHeight\": 1.50,\n        \"circleThickness\": 0.08,\n        \"height\": 20,\n    }\n};\n\nmsg2 = msg;\n\nreturn [msg1, msg2];",
        "outputs": 2,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 990,
        "y": 160,
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    {
        "id": "ba70f8b2eb787e10",
        "type": "mqtt in",
        "z": "6a1a72128b6a3842",
        "name": "",
        "topic": "gas/uas/0xWINKELBRUNN/gas_cmds/flight_state",
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        "statusType": "auto",
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        "type": "function",
        "z": "6a1a72128b6a3842",
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        "func": "var payload = msg.payload;\nvar topic = msg.topic;\nvar lat = msg.lattitude;\nvar lon = msg.longitude;\nvar name = msg.name;\nmsg.name = 'SIMULU';\n\nvar coordinates = {\n    'x': [51.68, 0],\n    'y': [0, 8.02]\n}\n\nif(topic == \"gas/uas/0xWINKELBRUNN/gas_cmds/flight_state\"){\n    msg.navigation = \"flight\";\n    msg.indicator_color = payload;\n    return msg;\n}\n\nif(topic == \"gas/uas/0xWINKELBRUNN/gas_cmds/guidance/geofence/dir\"){\n    msg.navigation = \"flight\";\n    msg.indicator_color = \"red\";\n    msg.direction = parseFloat(payload).toFixed(2);\n    for(var i=0;i<Object.keys(coordinates).length;i++){\n        msg.payload = {\n            'name': msg.name +i.toString(),\n            'lat': coordinates.x[i],\n            'lon': coordinates.y[i],\n            'icon': 'fa-plane',\n            'iconColor': 'blue',\n            'layer': 'dir'\n        }\n        node.send(msg);\n\n    }\n    return msg; \n    \n}\nif(topic != \"gas/uas/0xWINJKELBRUNN/gas_cmds/guidance/geofence/dir\"){\n    msg.payload = {\n        name : msg.name,\n        deleted : true,\n        command : {\n            clear : 'dir'\n        }\n    }\n}\n\n\n\n",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 620,
        "y": 220,
        "wires": [
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    {
        "id": "3054da89f1625705",
        "type": "mqtt in",
        "z": "6a1a72128b6a3842",
        "name": "",
        "topic": "gas/uas/0xWINKELBRUNN/gas_cmds/guidance/geofence/#",
        "qos": "0",
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    {
        "id": "7e3d5f575013bbce",
        "type": "switch",
        "z": "6a1a72128b6a3842",
        "name": "Switch b/w topics",
        "property": "topic",
        "propertyType": "msg",
        "rules": [
            {
                "t": "eq",
                "v": "gas/uas/0xWINKELBRUNN/gas_cmds/guidance/geofence/dir",
                "vt": "str"
            },
            {
                "t": "eq",
                "v": "gas/uas/0xWINKELBRUNN/gas_cmds/guidance/geofence/distance",
                "vt": "str"
            },
            {
                "t": "eq",
                "v": "gas/uas/0xWINKELBRUNN/gas_cmds/warning/geofence",
                "vt": "str"
            }
        ],
        "checkall": "true",
        "repair": false,
        "outputs": 3,
        "x": 350,
        "y": 400,
        "wires": [
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                "18be8df23cba51a5"
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        "finalize": "",
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        "finalize": "",
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                "8866a4cbaf06df87",
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                "p": "payload",
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                "tot": "msg"
            }
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        "z": "6a1a72128b6a3842",
        "name": "",
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        "lon": "6.8",
        "zoom": "4",
        "layer": "OSMC",
        "cluster": "4",
        "maxage": "1",
        "usermenu": "show",
        "layers": "show",
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        "coords": "deg",
        "showgrid": "false",
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        "path": "/worldmap",
        "overlist": "DR,CO,RA,DN,AC,TL,HM",
        "maplist": "OSMG,OSMC,EsriC,EsriS,EsriT,EsriDG,UKOS",
        "mapname": "",
        "mapurl": "",
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        "group": "1b60bd173cfedbb2",
        "order": 8,
        "width": 0,
        "height": 0,
        "name": "Display Message",
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        "layout": "row-center",
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        "x": 1130,
        "y": 500,
        "wires": []
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        "id": "bd4e5771559f76c8",
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        "name": "",
        "group": "1b60bd173cfedbb2",
        "order": 7,
        "width": 6,
        "height": 4,
        "gtype": "compass",
        "title": "Navigation",
        "label": "Degrees",
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        "min": 0,
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        "colors": [
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        "seg1": "",
        "seg2": "",
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        "x": 1190,
        "y": 160,
        "wires": []
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        "id": "50cac0e3e57c33cc",
        "type": "ui_audio",
        "z": "6a1a72128b6a3842",
        "d": true,
        "name": "Audio on Dashboard",
        "group": "1b60bd173cfedbb2",
        "voice": "Google US English",
        "always": true,
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        "y": 540,
        "wires": []
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        "resendOnRefresh": true,
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        "height": 2,
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        "fwdInMessages": true,
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        "fwdInMessages": true,
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        "type": "ui_template",
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        "group": "1b60bd173cfedbb2",
        "name": "Height_Status",
        "order": 1,
        "width": 3,
        "height": 4,
        "format": "<style>\n     #height_upwards{\n        font-size:72px;\n        text-align:center;\n        vertical-align:middle;\n        border-radius:50%;\n        background:{{msg.color}};\n        animation: blinker 1s linear infinite;\n    }\n    #height_downwards{\n        font-size:72px;\n        text-align:center;\n        vertical-align:middle;\n        border-radius:50%;\n        background:{{msg.color}};\n        animation: downwards 1s alternate infinite;\n        /*visibility:hidden;*/\n    }\n    #text{\n        position:relative;\n        text-align:center;\n        padding-top:1px;\n    }\n    #height_downwards{\n        position:relative;\n        top:30px;\n    \n    }\n     .height{\n       display:flex;\n       margin-left:20px;\n       width:50%;\n        \n    }\n    \n</style>\n\n<div class=\"height\">\n    <table class=\"height_status\">\n        <tr>\n            <td><h3>Height:</h3></td>\n        </tr>\n        <tr>\n            <td><i class=\"material-icons\" id=\"height_upwards\">{{msg.height_1}}</i></td>\n        </tr>\n        <tr>\n            <td id= \"text\"><h4>{{msg.height}} meters</h4></td>\n        </tr>\n        <tr>\n            <td><i class=\"material-icons\" id=\"height_downwards\">{{msg.height_2}}</i></td>\n        </tr>\n            \n    </table>\n        \n</div>",
        "storeOutMessages": true,
        "fwdInMessages": true,
        "resendOnRefresh": true,
        "templateScope": "local",
        "className": "",
        "x": 1180,
        "y": 440,
        "wires": [
            []
        ]
    },
    {
        "id": "4270807e778dbf05",
        "type": "ui_worldmap",
        "z": "6a1a72128b6a3842",
        "group": "1b60bd173cfedbb2",
        "order": 6,
        "width": 9,
        "height": 5,
        "name": "",
        "lat": "2.9",
        "lon": "6.8",
        "zoom": "4",
        "layer": "OSMG",
        "cluster": "4",
        "maxage": "1",
        "usermenu": "hide",
        "layers": "hide",
        "panit": "true",
        "panlock": "false",
        "zoomlock": "false",
        "hiderightclick": "true",
        "coords": "deg",
        "showgrid": "false",
        "allowFileDrop": "false",
        "path": "/worldmap",
        "overlist": "DR,CO,RA,DN,HM",
        "maplist": "OSMG,OSMC,EsriC,EsriS,EsriT,EsriDG,UKOS",
        "mapname": "",
        "mapurl": "",
        "mapopt": "",
        "mapwms": false,
        "x": 840,
        "y": 40,
        "wires": []
    },
    {
        "id": "a635293a09a88a33",
        "type": "mqtt-broker",
        "name": "SIMULU - Standard pub/sub",
        "broker": "wss://mqtt.simulu.app",
        "port": "443",
        "tls": "ca1efa415c070b56",
        "clientid": "",
        "autoConnect": true,
        "usetls": true,
        "protocolVersion": "4",
        "keepalive": "60",
        "cleansession": true,
        "birthTopic": "",
        "birthQos": "0",
        "birthPayload": "",
        "birthMsg": {},
        "closeTopic": "",
        "closeQos": "0",
        "closePayload": "",
        "closeMsg": {},
        "willTopic": "",
        "willQos": "0",
        "willPayload": "",
        "willMsg": {},
        "userProps": "",
        "sessionExpiry": ""
    },
    {
        "id": "1b60bd173cfedbb2",
        "type": "ui_group",
        "name": "User_Interface",
        "tab": "a50c557d2ff0efa6",
        "order": 1,
        "disp": true,
        "width": 15,
        "collapse": false,
        "className": ""
    },
    {
        "id": "ca1efa415c070b56",
        "type": "tls-config",
        "name": "",
        "cert": "",
        "key": "",
        "ca": "",
        "certname": "",
        "keyname": "",
        "caname": "",
        "servername": "",
        "verifyservercert": true,
        "alpnprotocol": ""
    },
    {
        "id": "a50c557d2ff0efa6",
        "type": "ui_tab",
        "name": "SIMULU",
        "icon": "dashboard",
        "disabled": false,
        "hidden": false
    }
]
5

No idea, as i do not have world map installed.
Having a quick read of the docs, you would just need to send the new coordinates with the unique name and the point should move i beleive.

name must be a unique identifier across the whole map. Repeated location updates to the same name move the marker.

6

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