[Qgis-user] QGIS Shapefile Structure (?)

[Nicolas Cadieux]

Hi, 
I have no inside knowledge of this as I am not an the development team but I remember a good post on the subject explaining that Qgis did repack the shp file when closing the file with deleted features.  Is this only done on a "save as"? 
The problem may be cause by another GIS, like Manifold, as I remember that this problem could lead to a totally corrupt shape file like what we as seeing here. 
Nicolas 
On Jun 22, 2016 4:38 AM, "Alexandre Neto [via OSGeo.org]	" <ml-node+s1560n5272780h41 at n6.nabble.com> wrote: 

	Hello Spring, 
This has to do with the way qgis (GDAL) handles the feature deletion. Instead of totally removing them (which takes longer) it mark them as deleted. 
The (not very elegant) workaround here is to save the layer to a new shapefile using save as... 
Hope it helps 
A qua, 22/06/2016, 09:39, Springfield Harrison < [hidden email] > escreveu: Hello All, 

        I have been opening QGIS shapefiles in Manifold GIS and noticed that 
they bear very little resemblance to the same file in QGIS, in some 
cases.  When I then saved that file in QGIS as a different file, and 
opened it in Manifold GIS, all the features were present and arranged 
as expected. 

        On another occasion, it looked like previously deleted polygons were 
visible when opened in Manifold GIS. 

        And, in another instance, when attempting in QGIS to create a 
polygon, that failed.  Instead, portions of old, deleted polygons 
were reactivated instead!  What is going on here?  This does not look 
like trustworthy behavior. 

        I tried using SpatiaLite files instead of shapefiles, but there edit 
and feature  creation failed outright. 

        I believe this has been dealt with earlier; could someone point me 
to the discussion?  I did a brief search but could not find the relevant posts. 

                Thanks very much, Cheers . . . . . . . . Spring Harrison 



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