ogrmerge - Merge several vector datasets into a single one.
ogrmerge.py -o out_dsname src_dsname [src_dsname]*
[-f format] [-single] [-nln layer_name_template]
[-update | -overwrite_ds] [-append | -overwrite_layer]
[-src_geom_type geom_type_name[,geom_type_name]*]
[-dsco NAME=VALUE]* [-lco NAME=VALUE]*
[-s_srs srs_def] [-t_srs srs_def | -a_srs srs_def]
[-progress] [-skipfailures] [--help-general]
Options specific to the -single option:
[-field_strategy FirstLayer|Union|Intersection]
[-src_layer_field_name name]
[-src_layer_field_content layer_name_template]
New in version 2.2.
ogrmerge.py script takes as input several vector datasets,
each of them having one or several vector layers, and copy them in a target
dataset.
There are essential two modes:
- the default one, where each input vector layer, is copied as a separate
layer into the target dataset
- another one, activated with the -single switch, where the content of all
input vector layers is appended into a single target layer. This assumes
that the schema of those vector layers is more or less the same.
Internally this generates a vector.vrt file, and if the output
format is not VRT, final translation is done with ogr2ogr or
gdal.VectorTranslate(). So, for advanced uses, output to VRT,
potential manual editing of it and ogr2ogr can be done.
- <src_dsname>
- One or several input vector datasets. Required
- -f <format>
- Select the output format. Starting with GDAL 2.3, if not specified, the
format is guessed from the extension (previously was ESRI Shapefile). Use
the short format name
- -single
- If specified, all input vector layers will be merged into a single
one.
- -nln
<layer_name_template>
- Name of the output vector layer (in single mode, and the default is
"merged"), or template to name the output vector layers in
default mode (the default value is {AUTO_NAME}). The template can
be a string with the following variables that will be susbstitued with a
value computed from the input layer being processed:
- {AUTO_NAME}: equivalent to {DS_BASENAME}_{LAYER_NAME} if
both values are different, or {LAYER_NAME} when they are identical
(case of shapefile). 'different
- {DS_NAME}: name of the source dataset
- {DS_BASENAME}: base name of the source dataset
- {DS_INDEX}: index of the source dataset
- {LAYER_NAME}: name of the source layer
- {LAYER_INDEX}: index of the source layer
- -update
- Open an existing dataset in update mode.
- -overwrite_ds
- Overwrite the existing dataset if it already exists (for file based
datasets)
- -append
- Open an existing dataset in update mode, and if output layers already
exist, append the content of input layers to them.
- -overwrite_layer
- Open an existing dataset in update mode, and if output layers already
exist, replace their content with the one of the input layer.
- -src_geom_type
<geom_type_name[,geom_type_name]\*]>
- Only take into account input layers whose geometry type match the type(s)
specified. Valid values for geom_type_name are GEOMETRY, POINT,
LINESTRING, POLYGON, MULTIPOINT, MULTILINESTRING, MULTIPOINT,
GEOMETRYCOLLECTION, CIRCULARSTRING, CURVEPOLYGON, MULTICURVE,
MULTISURFACE, CURVE, SURFACE, TRIANGLE, POLYHEDRALSURFACE and TIN.
- -progress
- Display progress on terminal. Only works if input layers have the
"fast feature count" capability.
- -skipfailures
- Continue after a failure, skipping the failed feature.
- -field_strategy
FirstLayer|Union|Intersection
- Only used with -single. Determines how the schema of the target
layer is built from the schemas of the input layers. May be FirstLayer to
use the fields from the first layer found, Union to use a super-set of all
the fields from all source layers, or Intersection to use a sub-set of all
the common fields from all source layers. Defaults to Union.
- -src_layer_field_name
<name>
- Only used with -single. If specified, the schema of the target
layer will be extended with a new field 'name', whose content is
determined by -src_layer_field_content.
- -src_layer_field_content
<layer_name_template>
- Only used with -single. If specified, the schema of the target
layer will be extended with a new field (whose name is given by
-src_layer_field_name, or 'source_ds_lyr' otherwise), whose content
is determined by layer_name_template. The syntax of
layer_name_template is the same as for -nln.
Create a VRT with a layer for each input shapefiles
ogrmerge.py -f VRT -o merged.vrt *.shp
Same, but creates a GeoPackage file
ogrmerge.py -f GPKG -o merged.gpkg *.shp
Concatenate the content of france.shp and germany.shp in
merged.shp, and adds a 'country' field to each feature whose value is
'france' or 'germany' depending where it comes from.
ogrmerge.py -single -o merged.shp france.shp germany.shp -src_layer_field_name country
Even Rouault <even.rouault@spatialys.com>