How can I Split A polygon and how can I merge serveral polygon

[xiaoyunnsongb]

Dear superiors:

    Now I have a question to request ,please lost several minutes.

Q1: How can i split a polygon

   now   there is a polygon A,when i draw a line, then the polygon split to two (A1,A2).

                                      pic one

                                                             pic two

Q2:How can i merge serveral polygon to one

   now  there is two  or more than two polygons next (A1,A2) ,when I  press Ctrl key ,then  the polygons all be choiced ,how  can I merge then to one(A)

like the picture up  pic two ------> pic one

[BartSmit]

there should be a 'merge' option in the menu on your editor toolbar. Make sure you have only features selected from the same layer otherwise the merge will not work.

[xiaoyunnsongb]

Dear Mr Bart Smit:

         Thanks very much.

  Is it   esri/dijit/editing/Editor? Yes in a  layer, How can i split the polygon?

                Best wishes

[BartSmit]

hhm, I'm afraid I spoke too soon. I can't find any code that has merge/split. All I can find is vertex/move/snap etc .. It might have been a geoprocessing service that offered that functionality. Or it might not have been esri stuff.. I can't recall the example. I'm sorry.

[xiaoyunnsongb]

Dear Bart Smit：

Also thanks to you。

[xiaoyunnsongb]

Superiors：

           My  function is  in javascript Of html ，not desktop， thanks very much。

[MonyrothLy]

U can use the cut polygon tool

[xiaoyunnsongb]

Dear monyrothly：

       Thanks very much. But  I still  not  understand, Can you give the  component  in esri, 

Wish  you happy every day.

[JoshHevenor · Accepted solution]

You'll need the geometryService:

geometryservice-amd | API Reference | ArcGIS API for JavaScript‌

This will get you geometries and you can update/create your features for saving as required. Here's how I've done this.

Split:

- Start with a selected polygon (know what you're splitting)

- Use the draw toolbar to get a line (onDrawEnd Event)

- I use the GeometryService->trimExtend to make sure the line will cut completely

- Use geometryService->cut([selectedPoly], newLine, ...) to get two new polys

- save the new polys (add two new and delete old, or whatever works for your data)

Merge

- Select multiple polygons

- geometryService->union([selectedPolys]) to get one poly

- save the new poly (delete the old, add new, etc).

I haven't touched on managing the attributes, but that shouldn't be bad once you have the geometries: