[Qgis-user] Looking for a suggestion on a vector format

Fri Dec 18 08:56:23 PST 2015

Hi, 
Unless someone has magic server solution I don't know about, a QGIS project will always be a QGIS project file and a data file for each layer (vector or raster). 
I don't know if spatialite is capable of storing different type of geometries (like a gml file) but it is good practice to save different geometries (point, line, polygons) and themes in different files or layers.  A DWG/DXF works differently as they can store layers within the same file but QGIS will only use one layer at a time. You can import many layers at once but keep in mind that  DWG exports and imports are far from perfect and DWG  are limited in their data base capabilities. 
There is no sub project in QGIS like you have in AutoCad.  In AutoCad, you can have external references to other file so that one person can design a garage and another the first floor.  If you have a server, you can have more than one person working with the same layers.   Spatialite is a data base but it does not support multi -users (to my knowledge). 
Nicolas Cadieux M.Sc. 
Les Entreprises Archéotec inc.  
8548, rue Saint-Denis Montréal H2P 2H2 
Téléphone: 514.381.5112  Fax: 514.381.4995 
www.archeotec.ca 
On Dec 18, 2015 11:23 AM, "Jesse McGraw [via OSGeo.org]" <ml-node+s1560n5241965h76 at n6.nabble.com> wrote: 

    Even though I'd prefer one file per procedure, a QGIS project + a
    database would probably be an acceptable compromise.  

    However, how could I then add that new project file to an existing
    project as a new layer?  Is there a concept in QGIS of sub projects? 

    On 12/18/2015 10:01 AM, Randal Hale
      wrote: 

      Ye gads... 

      Well....I would say no to shapefiles. 
      Spatialite would work - probably postgis would be better. 

      You could contain your project in one QGIS File - for instance I'm
      story an entire project in postgis and am retrieving various
      components through about 20 qgs files. All the annotation etc is
      stored in the qgs file, all labels, line colors, and map layouts.
      All the data is stored in PostGIS. 

      Of course that's a much larger discussion than my simple few
      sentences - but I think if you want everything stand alone.....eh
      - it's going to have to be at least two components or
      QGIS/<file format> of some sort. I think there will always
      be some external querying (be it automatic or manual)....of I'm
      understanding it all correctly. 

      ...and I just looked at your example and that's a head scratcher.
      I think QGIS with Atlas to pull from the database automatically
      maybe a better train of thought. 

      I just wanted to say Good Luck, We're all counting on you. 

      Randy 

      On 12/18/2015 09:14 AM, Jesse McGraw
        wrote: 

        All, 
          Before I go too far down the wrong path perhaps you can help
        me with a suggestion on a vector format to use for a project of
        mine:  

        I'm to looking to basically re-create various Instrument
        Approach Procedure plates (see here 
        for an example for San Francisco International - SFO ) from a
        database via a perl script and display a number of them as
        vector overlays in an existing QGIS project 

        What would be a good format to use for this purpose?  

        I'm imagining something like a QGIS project file, but I want it
        to contain to contain all of the various bits of information
        internally (coordinates, names, styling, icons etc.) and not
        have to query anything external so each file is a stand-alone
        unit.  

        Ideally all of the coordinates would be real world lon/lat so no
        transformation would be required.  Bonus points if the format is
        openly standardized and easy to work with 

        DWG/DXF?  SVG? 

        Thanks, 
          Jesse 

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Randal Hale
North River Geographic Systems, Inc
http://www.northrivergeographic.com 
423.653.3611 [hidden email] 
twitter:rjhale     http://about.me/rjhale 
http://www.northrivergeographic.com/introduction-to-quantum-gis 
Southeast OSGEO: http://wiki.osgeo.org/wiki/Southeast_US 

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