Labels and markers created but not updating.

john432003 — Tue, 05 Dec 2023 04:01:50 GMT

The code creates the marker for each SN but the marker and labels do not move after the initial creation.

client.on('message', (topic, message) => { const payload = JSON.parse(message.toString()); console.log('Received message:'); const serialNumber = payload.serial_number; // Check if a point already exists for this serial number if (pointsBySerialNumber.hasOwnProperty(serialNumber)) { // Update the existing point's location const existingPoint = pointsBySerialNumber[serialNumber]; existingPoint.latitude = payload.latitude; existingPoint.longitude = payload.longitude; existingPoint.z = payload.elevation_agl; console.log(existingPoint); // Update the existing label's location existingPoint.label.geometry = existingPoint.geometry.clone(); } // The else works else { // Create a new point and store it in the dictionary const newPoint = new Point({ latitude: payload.latitude, longitude: payload.longitude, z: payload.elevation_agl, spatialReference: { wkid: 4326 } }); const newLabel = new Point({ latitude: payload.latitude, longitude: payload.longitude, z: payload.elevation_agl + 50, spatialReference: { wkid: 4326 } }); // Lets update the label and AGL using the Last 4 of the SN let lab = serialNumber.slice(-4) + ' \n AGL:' + Math.floor(payload.height).toString(); const label = new Graphic({ geometry: newLabel, symbol: { type: "text", color: [255, 255, 255], haloColor: [0, 0, 0], haloSize: 2, text: lab, font: { size: 12, family: "sans-serif" } } }); const imageUrl = 'p.png'; // Replace with the URL of your image const imageSymbol = { type: 'picture-marker', url: imageUrl, width: 20, // Adjust the width of the image height: 20, // Adjust the height of the image yoffset: 25 // Adjust this value to set the desired vertical offset }; // Add the new image and label to the map view.graphics.addMany([ new Graphic({ geometry: newPoint, symbol: imageSymbol }), label ]); // Store the new point and label in the dictionary pointsBySerialNumber[serialNumber] = { geometry: newPoint, label: label }; } });

Re: Labels and markers created but not updating.

JoelBennett — Wed, 06 Dec 2023 00:11:18 GMT

It doesn't appear there's a documented way to make the View update when a geometry's coordinates have changed, apart from cloning the geometry or the graphic.

Probably the best alternate way to achieve this is to use the undocumented "notifyGeometryChanged" method of the Graphic class. For example:

graphic.geometry.latitude = newLat; graphic.geometry.longitude = newLon; graphic.notifyGeometryChanged();

If you go in this direction, you'd need to change your "pointsBySerialNumber" map to store references to the graphic objects instead of the point objects.

topic Re: Labels and markers created but not updating. in ArcGIS JavaScript Maps SDK Questions

Labels and markers created but not updating.

Re: Labels and markers created but not updating.