Re: [JPP-Devel] Editing shapefiles with SBN and SBX indexes

Hi Larry, Jukka,

Deleting index files when the .shp is written back to disk seems safe 
and easy.

Making a test to see how zipped shapefile can be handled,
I just discover that OpenJUMP let you modify a file issued from a zip,
but throw a warning when you want to save it.
Need to check if zipped files can be tagged as read-only.

Michaël

> I just ran into an issue with SkyJUMP and I assume OpenJUMP (since our 
> shapefile drivers are the same).  When I add features to a shapefile 
> layer that was created by ESRI and save changes, the SBN and SBX 
> optional spatial index files are not updated (when present),  This 
> causes problems when viewing in ESRI-based software which assumes that 
> the spatial indexes are up to date with their associated shapefiles.
>
> According to Wikipedia, these index files are not supported by any 
> software except ESRI and are "not strictly necessary."  My testing 
> seems to confirm that deleting them does no harm.  I suggest that we 
> check for the existence of shapefiles with.sbn and .sbx extensions 
> (not to be confused with SHX database index files) and delete them as 
> part of the process of writing or updating a shapefile.  This should 
> probably go at the end of 
> com.vividsolutions.jump.io.ShapefileWriter.write.
>
> Comments?
>
> regards,
>
> Larry Becker
> ISA
>
>
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