[Qgis-user] Newbie Questions
Giovanni Manghi
giovanni.manghi at gmail.com
Tue Sep 28 11:06:04 PDT 2010
Hi,
> 1. I tried doing this with Join Attributes and selecting the CSV file.
> However I found that when QGIS reads in the CSV file, it casts all of
> the columns as Text, so I couldn't use the numerical values. I notice
> the Join Attributes from CSV feature is new in QGIS 1.5.0. Maybe there
> is a bug?
you can do Joins with dbf tables. New join features are being developed.
> 2. Eventually I will want to put my data into a database. I notice I
> can choose between SpatiaLite and PostGIS. Which is easier to use? Is
> there a performance difference?
among the others, Postgis is an extension of PostgreSQL, so is server
based, spatialite is file based.
> 3. In ArcMap, I frequently used the capability to vary the thickness
> of line features according to a value in the attribute table. I notice
> that this capability is available in QGIS only for points ("drawing by
> field") but not for line features. Is there another way to accomplish
> variable thickness lines in QGIS? If not, is "drawing by field" for
> line features under development?
new symbology -> advanced -> size scale field
cheers
-- Giovanni --
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