Which service to use and when

Discussion created by VinayBa on Aug 22, 2013
Latest reply on Aug 23, 2013 by svakil-esristaff
HI All,

  I am starting with ArcGis for our application.I am not sure when and how do these matter.When i look at api reference there are so may api .Layer,dijit ,geometry , geocoder .If i want to display map and have interactive feature on this which service should i use.