[Qgis-user] Newbie question

[Tiago Tomé]

Not sure if I'm understanding your question.

If you have shapefiles, you can delete any column you wish. And add any
column you wish. Using the identify function (what I'm guessing you mean by
information cursor) simply retrieves every field contained in the table for
that feature. Also, the lat and long retrieved and displayed by that tool
are not being gathered from the attribute table, they are what QGIS calls
"derived data".

On Tue, Feb 13, 2018 at 4:30 AM, Richard Duivenvoorde <rdmailings at duif.net>
wrote:

> On 13-02-18 03:49, John Glass wrote:
> > Apologies ahead of time. Searched for the answer, but was unable to find.
> >
> > I want to edit the fields in an attribute table (US Census /places/
> > shapefile) as some are not necessary for my map. I suspect that there
> > are some that are mandatory for the /information/ cursor to correctly
> > identify the place. Which fields might those be? Clearly they are the
> > long/lat fields and the name of the place, but what others are required
> > for the additional field data I want to add to be displayed?
>
> Hi John,
>
> If I'm correct you have data, and you want to throw away attributes?
>
> Normally you can throw away what you want. Depending on the type of data
> you have, you normally have either one column holding the Geometry
> (Point, Polygon or Line) most often in Binary Form. OR (in case of a csv
> dataset, you have indeed an x and y column). But besides that you can
> have 1 or more optional attributes (I even think it is possible to have
> None attributes).
>
> Also depending on the type of data you have, there are often some
> auxillary files (sometimes an index file, or a file containing
> projection info etc)
>
> The proof is in the eating :-) Just try.
>
> Regards,
>
> Richard Duivenvoorde
>
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