ogrmerge(1)ogrmerge(1)NAMEogrmerge - Merge several vector datasets into a single one.
SYNOPSIS
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 -single:
[-field_strategy FirstLayer|Union|Intersection]
[-src_layer_field_name name]
[-src_layer_field_content layer_name_template]
DESCRIPTION
(Available since GDAL 2.2)
The 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 VRT file, and if the output format is not
VRT, final translation is done with ogr2ogr / gdal.VectorTranslate. So
for advanced uses, output to VRT, potential manual editing of it and
ogr2ogr can be done.
-o out_dsname:
Output dataset name. Required.
src_dsname:
One or several input vector datasets. Required
-f format:
Select the output format. VRT is a valid output format as well.
Defaults to 'ESRI Shapefile'
-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.
-dsco NAME=VALUE:
Dataset creation option (format specific)
-lco NAME=VALUE:
Layer creation option (format specific)
-a_srs srs_def:
Assign an output SRS
-t_srs srs_def:
Reproject/transform to this SRS on output
-s_srs srs_def:
Override source SRS
-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.
EXAMPLES
· Creates 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
AUTHORS
Even Rouault even.rouault@spatialys.com
GDAL Sun Dec 17 2017 ogrmerge(1)
