[Gfoss] qgis - uso dei memory layer

ho uno shape file di sei complessi scolastici ognuno costituito da più
edifici e ogni edificio ha i suoi bravi attributi.
vorrei fare degli allestimenti per ogni complesso e mantenere nella toc del
progetto traccia di questo.
per evitare di splittare lo shape originale in sei, ho pensato quindi di
utilizzare il plugin "edit any layer" per creare sei copie virtuali dello
shape iniziale, filtrando in ciascuno per la scuola che mi interessa e
potreci così giocare mantenendo l'unità originale.
con mio sommo dispiacere, il plugin non permette il filtro ma soprattutto
chiudendo il progetto il contenuto di questi shape sparisce.

la mia domanda è: esiste un altro modo per avere nella toc lo stesso shape
senza doverlo ricaricare enne volte?

grazie mille

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From: stefano.campus@regione.piemonte.it [stefano.campus@regione.piemonte.it]
Sent: 11 September 2012 07:24
To: Chris Crook
Subject: MemoryLayerSaver plugin?

hi chris,
i'd like to use your plugin to have in my project just one original shape
file and many copies of that in order to make analysis and layout within a
subset of it.
what i see is:
1) when a memory layer is created is not possible to make a selection of
subset by means of "query builder" in layer properties-->general tab
2) when i save the project and re open, memory layer is in the toc but it
doesn't have any features.

is it right or i'm doing some errors?

thank you in advance

s.

________________________________
FROM Chris Crook
Subject: MemoryLayerSaver plugin?

Hi Stefano

1) The memory layer provider doesn't have support the query builder - this
is just the way it is coded. I guess you could make a feature request for
that to be added to QGIS

2) By default QGis doesn't retain the contents of memory layers when the
project is closed - as you see it keeps the definition of the layer in the
table of contents, but loses the data. This is not an error on your part,
it is just the design of the memory layer. This is what the
MemoryLayerSaver plugin is for ... once it is installed it should save the
contents any memory layers...

Cheers
Chris
________________________________________

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