topic Re: The AREA and PERIMETER "items" (fields) in an Arc/Info coverages were maintained by the system, right? Could the user overwrite them? in Data Management Questions

The AREA and PERIMETER "items" (fields) in an Arc/Info coverages were maintained by the system, right? Could the user overwrite them?

AZendel — Tue, 22 Jun 2021 20:25:12 GMT

We have zoning snapshots from pre-2000 that were saved as ArcInfo coverages. Because ArcGIS Pro can't read coverages, we are working on a python script to convert them to file geodatabase feature classes and annotation. Quick question: were the AREA and PERIMETER 'items' (fields) in a polygon attribute table maintained by the ArcInfo software, similarly to how ArcGIS maintains the shape_area and shape_length in geodatabases these days? I think the answer was yes, but it would be good to get some confirmation. Also, could ArcInfo users edit the AREA and PERMITER fields? Again, I think I know the answer: No. But please confirm.

Re: The AREA and PERIMETER "items" (fields) in an Arc/Info coverages were maintained by the system, right? Could the user overwrite them?

JoeBorgione — Tue, 22 Jun 2021 21:15:56 GMT

I can't confirm (or deny) what you are asking, but if my memory serves me and it's up to a bet, my money is on what you think. Good ol' ArcInfo maintained Area & Perimeter but a user could not edit those values.

Re: The AREA and PERIMETER "items" (fields) in an Arc/Info coverages were maintained by the system, right? Could the user overwrite them?

VinceAngelo — Tue, 22 Jun 2021 21:28:50 GMT

My (hazy) memory was that they were in the INFO file, and could be edited, but would be clobbered by the next BUILD or CLEAN.

- V

(Since 4.01/5.0-beta)

Re: The AREA and PERIMETER "items" (fields) in an Arc/Info coverages were maintained by the system, right? Could the user overwrite them?

JoeBorgione — Tue, 22 Jun 2021 21:36:38 GMT

Maybe it was just conventional wisdom to not to edit them.

@VinceAngelo ; You are stuck on a desert island and you can only have one data structure. Coverage or Shape File: which do you choose?

Re: The AREA and PERIMETER "items" (fields) in an Arc/Info coverages were maintained by the system, right? Could the user overwrite them?

VinceAngelo — Wed, 23 Jun 2021 14:36:35 GMT

Poison starfish (if I can't run PostgreSQL on coconuts with vines and ferrous rocks for cores).

- V