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merge-shape-files

Merge shape files

ogr2ogr -lco ENCODING=UTF-8 -f 'ESRI Shapefile' merge.shp ne_10m_admin_0_countries.shp

next merge another shape file with merge.shp

ogr2ogr -f 'ESRI Shapefile' -update -append merge.shp ne_10m_admin_0_disputed_areas.shp -nln merge

Where

-f format_name:

output file format name, some possible values are:

     -f "ESRI Shapefile"
     -f "TIGER"
     -f "MapInfo File"
     -f "GML"
     -f "PostgreSQL"

-append:

Append to existing layer instead of creating new

-overwrite:

Delete the output layer and recreate it empty

-update:

Open existing output datasource in update mode rather than trying to create a new one

-select field_list:

Comma-delimited list of fields from input layer to copy to the new layer. A field is skipped if mentioned previously in the list even if the input layer has duplicate field names. (Defaults to all; any field is skipped if a subsequent field with same name is found.) Starting with OGR 1.11, geometry fields can also be specified in the list.

-nln name:

Assign an alternate name to the new layer

Refer the official document

Bash command

#!/bin/bash

file="./final/merge.shp"

for i in $(ls *.shp)
do

      if [ -f "$file" ]
      then
           echo "creating final/merge.shp" 
           ogr2ogr -f 'ESRI Shapefile' -update -append $file $i -nln merge
      else
           echo "merging……"
      ogr2ogr -f 'ESRI Shapefile' $file $i -lco ENCODING=UTF-8
fi
done

Convert Shapefiles into GeoJSON

ogr2ogr -f "GeoJSON" w.geojson merge.shp

select only required fields

ogr2ogr -select NAME,ISO_A2 -f "GeoJSON" world_with_ant.geojson merge.shp

select and where

ogr2ogr -select NAME,ISO_A2 -where 'ISO_A2!="AQ"' -f "GeoJSON" world_without_ant.geojson merge.shp

Convert GeoJSON into topoJSON

geo2topo input.geojson > output.topojson

muni2explore / merge-shape-files