[Qgis-user] save layer as with OGR2OGR options

[Julien Guilloux]

Thanks Victor, 
That's what i thought to...There are some (litte) steps to do manualy. 
But i need to propose my users a easy script, so i am going to look for a quick script ( a good way to have a look to model and script...) 

best regards, 
Julien 

------------------------------ 
AFAIK the "data" and "layer" option box in the "Save As" dialog only handles -dcso and -lco options for ogr. So the -sql .... won't work. 


One option is to create "virtual fields" in QGIS with the correct field names "name", "cmt" ... and give these virtual fields the relevant content. 
However the export to gpx will fail if you specify -gpx_use_extensions= no , because the original field names doesn't fit the schema definition for GPX. This will cause an error message and the data won't be created 

To sum it up: 


    1. Use virtual fields in QGIS to create fields and values that's acceptable for GPX 
    2. use_gpx_extension has to be set to "yes" 
    3. Remember to save your GPX data in the EPSG:4326 projection (ll/wgs84) 

Regards 

Bo Victor Thomsen 
AestasGIS 
Denmark 
Den 16-02-2015 kl. 17:54 skrev Julien_Guilloux: 


Hi list,
i already read a lot of post about exporting layer in another format using
"save as " windows of QGIS with adding ogr2ogr options (in data source box
or layer box down the windows).

the trouble is the same that a lot of people : i "only" want to export a
layer shape in a layer GPX

1) of course i could only use GPX_USE_EXTENSIONS  = YES and all my fields
would go into the <extension>
 xml; 
But... it is not what i need. i really need to have the fields "name" and
"cmt" as they exist in the real gpx structure !

2) so, how to rename my field "testfield" to a field called "name" so as to
respect GPX syntax ?

in the data source option i try many many many syntaxe :

-sql "SELECT testfield AS name FROM testlayer" (this is ogr2ogr
documentation...)
-sql "SELECT testfield AS name"
sql "SELECT testfield AS name FROM testlayer"
"SELECT testfield AS name FROM testlayer"
'SELECT testfield AS name FROM testlayer'

Etc... But it never works !

i also try some syntaxe using the -dsco option but no more succes !

so, is it possible to use ogr2 ogr option ?

another thing : there use to be a samll GPX plugin to do that, we could
choose the field for name etc. ( i don't talk about gps extension with
gpsbabel)
is this plugin still exist ? theis plugin in was made with ogr2ogr i think,
so what not to use ogr2org option directly ans asked here ?

thanks a lot.


Thanks for helping. So long





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