[gdal-dev] ogr2ogr -f KML parameters

[LE LAMER Romain]

Hi,
During a kml export, from a shp, I have many tags that do not interest me and that I would like to delete.
I cannot find the information if it is possible via a parameter in the ogr2org program.

ogr2ogr -f KML output.kml input.shp

Ex:
<?xml version="1.0" encoding="utf-8" ?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document id="root_doc">
<Schema name="gbl_0_0" id="gbl_0_0">
<SimpleField name="DN" type="int"></SimpleField>
</Schema>
<Folder><name>gbl_0_0</name>
  <Placemark>
<Style><LineStyle><color>ff0000ff</color></LineStyle><PolyStyle><fill>0</fill></PolyStyle></Style>
<ExtendedData><SchemaData schemaUrl="#gbl_0_0">
<SimpleData name="DN">0</SimpleData>
</SchemaData></ExtendedData>
      <LineString><coordinates>-180,90 -168.75,90.0 -168.75,78.75 -180.0,78.75 -180,90</coordinates></LineString>
  </Placemark>
  <Placemark>
<Style><LineStyle><color>ff0000ff</color></LineStyle><PolyStyle><fill>0</fill></PolyStyle></Style>
<ExtendedData><SchemaData schemaUrl="#gbl_0_0">
<SimpleData name="DN">0</SimpleData>
</SchemaData></ExtendedData>
      <LineString><coordinates>-180,90 -168.75,90.0 -168.75,78.75 -180.0,78.75 -180,90</coordinates></LineString>
  </Placemark>
  <Placemark>
<Style><LineStyle><color>ff0000ff</color></LineStyle><PolyStyle><fill>0</fill></PolyStyle></Style>
<ExtendedData><SchemaData schemaUrl="#gbl_0_0">
<SimpleData name="DN">0</SimpleData>
</SchemaData></ExtendedData>
      <LineString><coordinates>-180,90 -168.75,90.0 -168.75,78.75 -180.0,78.75 -180,90</coordinates></LineString>
  </Placemark>
</Folder>
</Document></kml>

1 - I don't know why I have the triplicate entries ... Surely my input.shp from QGIS, I must be doing something wrong, but I can correct this via this (which was given to me):

gawk 'BEGIN{PROCINFO["sorted_in"]="@val_num_asc"}/LineString/{A[$0]=NR;next}{A[NR ":" $0]=NR}END{for (i in A) { sub(/^[0-9]+:/,"",i); print i }}' input.kml | gsed '/<Placemark>/{:bc;N;s/\/Placemark>/&/;tcc;bbc;:cc;/LineString/!d;}’ >input_simp.kml

which gives me :
<?xml version="1.0" encoding="utf-8" ?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document id="root_doc">
<Schema name="gbl_0_0" id="gbl_0_0">
<SimpleField name="DN" type="int"></SimpleField>
</Schema>
<Folder><name>gbl_0_0</name>
  <Placemark>
<Style><LineStyle><color>ff0000ff</color></LineStyle><PolyStyle><fill>0</fill></PolyStyle></Style>
<ExtendedData><SchemaData schemaUrl="#gbl_0_0">
<SimpleData name="DN">0</SimpleData>
</SchemaData></ExtendedData>
      <LineString><coordinates>-180,90 -168.75,90.0 -168.75,78.75 -180.0,78.75 -180,90</coordinates></LineString>
  </Placemark>
</Folder>
</Document></kml>

2 - And we arrive at what is the object of my question, which is to know if via a parameter of ogr2ogr it is possible that it does not write these lines
<Schema name="gbl_0_0" id="gbl_0_0">
<SimpleField name="DN" type="int"></SimpleField>
</Schema>

and

<ExtendedData><SchemaData schemaUrl="#gbl_0_0">
<SimpleData name="DN">0</SimpleData>
</SchemaData></ExtendedData>

which would give me a kml like this
<?xml version="1.0" encoding="utf-8" ?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document id="root_doc">
<Folder><name>gbl_0_0</name>
  <Placemark>
<Style><LineStyle><color>ff0000ff</color></LineStyle><PolyStyle><fill>0</fill></PolyStyle></Style>
      <LineString><coordinates>-180,90 -168.75,90.0 -168.75,78.75 -180.0,78.75 -180,90</coordinates></LineString>
  </Placemark>
</Folder>
</Document></kml>

I know it is possible to do it via sed but if I can do without this step it would be a plus

Thanks
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