topic Re: Getting all elements of a service layer in ArcGIS Runtime SDK for iOS Questions

Getting all elements of a service layer

RobertMartin2 — Thu, 14 Apr 2011 20:53:40 GMT

Hi all,

I have a rather basic question. I am using an dynamic map service in my app. I would like to query a layer in this service to retrieve *all* elements, so that the user can choose which will be displayed. Is there some sort of wildcard operator I can use in my AGSFindTask? Or a better way to do this altogether?

Thank you in advance,
Robert

Re: Getting all elements of a service layer

DiveshGoyal — Tue, 19 Apr 2011 17:51:37 GMT

Can you clarify what you mean by " retrieve *all* elements".
Are you referring to all the features in that service? Or all metadata about the service?

Re: Getting all elements of a service layer

RobertMartin2 — Sun, 24 Apr 2011 20:51:14 GMT

I meant all the features in a layer. In the meantime I'm using AGSIndentifyTask with a tolerance that includes all of the features, but I imagine there is more systematic way of doing this. Any thoughts?

Thank you.

Re: Getting all elements of a service layer

DiveshGoyal — Mon, 25 Apr 2011 21:28:06 GMT

That is one way.

Another way is to use the AGSQueryTask and execute a SQL query (such as "1=1") to get all the features from a particular layer. You'd have to do this for every layer in the service whose features you want.

Note, the number of features returned by query and identify task are limited by the 'max record count' setting on the service. At version 10, it defaults to 1000 features. You may need to bump it up if you want to retrieve more features in a single request.