topic Re: How to add graphics asynchronously from a database in real time in ArcGIS JavaScript Maps SDK Questions

How to add graphics asynchronously from a database in real time

hcgis — Fri, 20 Jul 2012 00:40:28 GMT

hi all
i want to plot points in my map every each period of time. these points are stored in sql server database
how can i do this
i m waiting for your suggestions

Re: How to add graphics asynchronously from a database in real time

derekswingley1 — Fri, 20 Jul 2012 13:40:31 GMT

Are you using ArcGIS Server to serve your data?

Re: How to add graphics asynchronously from a database in real time

hcgis — Fri, 20 Jul 2012 19:50:11 GMT

Hi Derek
we have an AVL database (SQL Server) and i want to add vehicle loctions to the map every selected period of time (1min, 2min...).
i'm just asking how to add and refresh these positions asynchronously without a full refresh of the map.
I want also to trace a vehicle by zooming to its position, the update on the map should be auto refresh at a prerdefined set time,
and draw the line of the path
I m using ArcGIS Server to serve other spatial data

Re: How to add graphics asynchronously from a database in real time

JianHuang — Fri, 27 Jul 2012 22:47:27 GMT

Those points could be added to graphicsLayer. When you need to refresh the layer, you can simply remove all existing graphics by calling graphicsLayer.clear(), and then add the current graphics to it.