[Qgis-user] Publish a book about the optimal use of QGIS

[PadmaDevi.Subramaniam at cognizant.com]

Hi Users,

We are facing issue with the Grass algorithm while dissolving vector layers.
We installed QGIS 2.6 using standalone installer in windows OS, 32 bit with 4GB RAM.
We are facing the below issue when Dissolving Vector layers using Grass commands.
The processing log shows the below error,

|Could not load model watersheds.model|Error in algorithm name: saga:catchmentareaparallel
ALGORITHM

The below error occurs while using Grass commands to dissolve vector layers,
Oooops! The following output layers could not be open
*       Dissolved layer: C:\Users\169099\AppData\Local\Temp\processing\5b5419e238924b5d87fc1e74254dec5b\output.shp
The above files could not be opened, which probably indicates that they were not correctly produced by the executed algorithm
Checking the log information might help you see why those layers were not created as expected
This algorithm requires GRASS to be run. A test to check if GRASS is correctly installed and configured in your system has been performed, with the following result:
GRASS seems to be correctly installed and configured


-----Original Message-----
From: qgis-user-bounces at lists.osgeo.org [mailto:qgis-user-bounces at lists.osgeo.org] On Behalf Of Werner Macho
Sent: Tuesday, November 18, 2014 2:25 PM
To: labiancamarilena at libero.it
Cc: qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] Publish a book about the optimal use of QGIS

Well

I guess there is no "optimal" use of QGIS. Everyone has other priorities and everyone is using QGIS in other ways.
So unless you are not writing a book for your own usecase I guess there will never be THE book for you.
Information about howto use and optimal workflows for different things will always be cluttered in different books or in the net.

The Documentation is there and (I hope) it covers all of the core functionality of QGIS. The way you assemble this functionality is completely in your hand.

Speking specifically from "where to download shapefiles" - There is a lot of open data available .. too much to for one book. And for some information you will find literally NO open data (unfortunately).
There is no "golden way" for that. (Beside that - downloading data is very country specific).

Sorry to say that.

But there is light.. If you have any specific question - just ask here on the mailing list and I am sure you will get some answers (for your book :) )

kind regards
Werner

On Tue, Nov 18, 2014 at 9:33 AM, labiancamarilena at libero.it <labiancamarilena at libero.it> wrote:
>
> Dear all,
> it is a bit 'of time I use QGIS and I must say that the community has
> helped me to solve many problems and to learn a lot about using QGIS.
> Meanwhile I also bought several books for using QGIS but I must say
> that they have many limitations.
> I ask because the community does not publish a book about the optimal
> use of QGIS, with all the tips and practical information (such as
> union and what precautions to use or where to download shapefiles .....).
> Thank you all as always.
> Marilena
>
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-user
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