Tracking with coordinates from database

Question

Hi,

I am using the Track widget simulation for tracking vehicle

Track widget simulation | ArcGIS API for JavaScript 4.11

I would like to input coordinates from database in place of this

var coords = [
              {
                lat: 34.05648363780692,
                lng: -117.19565501782613
              },
              {
                lng: -117.19565880345007,
                lat: 34.05682230352545
              },
              {
                lng: -117.19566258907402,
                lat: 34.05716096924398
              },
              },

How can i do the same.

rscheitlin · Answer

Satyanarayana, Nope, that is not creating a object with properties either. var coords; layer.queryFeatures().then(function(results){ coords = new Array(totalLength); for(i=0; i<10; i++){ coords[i]= { "lng": results.features[i].getAttribute("long"), "lat": results.features[i].getAttribute("lat") }; } }); ‍‍‍‍‍‍‍‍‍‍ But this will not help that much either now that I see your video. You can not jump around the world every second and expect the map to gather and draw all the basemap tiles in that amount of time. If you were moving less distance or giving more time between locations then it will smooth out.

SatyanarayanaNarmala · Answer

Could you help me with the code.

even i changed the following but result the same

for(i=0; i<10; i++)  
    {
      coords="lng: "+(results.features.getAttribute("long"))+","+" lat: "+(results.features.getAttribute("lat"));    
            
    }

to....

for(i=0; i<10; i++)  
    {
      coords=(results.features.getAttribute("long"))+",
 "+(results.features.getAttribute("lat"));    
            
    }

rscheitlin · Answer

Your array "coords", is an array of strings When it should be an array of objects with lat and lng properties.