Combining multiple grids in the same layer using python

[neomapper]

How do I combine multiple grids using python without having to create a new layer ?

[Kepa]

Hello @neomapper 

Do you mean having all different grids in one feature class? If that's the case you can create them (Grid Index Features -Cartography) and merge them with python into a singel FC. Or just merge them if you already have them.

If not try to clarify what's your goal here. Regards,

[neomapper]

Hi Kepa,

The grid index creates an entirely new layer which is something that I can't utilize because we have over +200 systems and approx. +3000 grids. There is the edit merge tool but I would have to manually select each and every system and grids to merge which is difficult doing this by hand each week. Is there a way or tool to select features in the same feature class and merge grids without having to create an entire new feature class?

[Kepa]

Ok, I was misunderstanding your goal here. You are talking about merging grid features of the same feature class and not grid feature classes, is that right?

[neomapper]

Yep, grid features of the same feature class!

[Kepa · Accepted solution]

So looking at your table I assume you want to merge them by system number field. The "easy" way would be (you'll have to deal with python logic a bit):

1. Dissolve by system number field, this will create a temporary feature class with the features merged by its value.
2. Create a SearchCursor for dissolved feature class storing system number value and SHAPE@ object in differente variables
3. Create an InsertCursor for your existing grid feature class
4. For every system number value from SearchCursor apply a Selection by attribute on your grid feature class and execute DeleteFeatures.
5. Finally add/insert the shape and system number value into your existing grid feature class with the InsertCursor (the rest of the fields would be Null of course, although I see only Name field has values)
6. Delete temporary feature class

Hope that helps!