topic Re: Create a feature layer using code in ArcGIS JavaScript Maps SDK Questions

Create a feature layer using code

ChiranjeeviGK — Tue, 17 Sep 2013 18:06:57 GMT

Hi

as in thetutorial we can create a feature layer thorugh code itself, and we can add the fetature on those.

my question is how i can save these feature layer in my online arcgis server, any API or REST or SOAP API's for this?

-Chiru

Re: Create a feature layer using code

ZachLiu1 — Tue, 17 Sep 2013 21:41:04 GMT

Not very sure if this is what you want. It looks like you want to save a collection of features generated in the application.

Possible solution:

You can publish an empty feature service, add it to your app as a feature layer, and then save the features you want to
the service using featureLayer.applyEdit() method.

Re: Create a feature layer using code

ChiranjeeviGK — Wed, 18 Sep 2013 05:05:39 GMT

i want to do somthing like map engine when i go to that page it will create default layer and we can add the points on it.

if we need another layer we can create by add layer button

So i dont want to make a empty layer from Online arcGIS, or else i need to make a empty layer from the code.

Thanks
Chiru

Re: Create a feature layer using code

KenBurcham — Wed, 18 Sep 2013 14:23:53 GMT

Hi Chiru,

Like ZachLiu said, you'll need to create an empty feature class and publish it as a map service in order to be able to create features and save them as edits.

One way you could make something that works like mapsengine would be to add a field to your new feature class called something like "EngineLayerId". Then when your user creates a new layer, what you do is just add a query ("definition expression") to the feature service for the new EngineLayerId that would return just the features marked for that sort of "virtual" layer. (I would also create another table called "EngineLayer" where you track these id's and most likely give them a name and associate them with your users, etc.). This way, you are only showing a specific set of features at a time, which to your users would be very much like their own layer.

Here's the FeatureLayer.setDefinitionExpression docs: https://developers.arcgis.com/en/javascript/jsapi/featurelayer-amd.html#setdefinitionexpression

There are probably other ways to do it, but making virtual layers with a query from a single feature service would be simple and might do just what you want.

Good luck!

ken.

Re: Create a feature layer using code

ChiranjeeviGK — Wed, 18 Sep 2013 14:43:44 GMT

This is good idea,

i will try this thank you ..