42 lines
1.3 KiB
Bash
Executable File
42 lines
1.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# Extract and load postcode data for search
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#
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# Download
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# Codepoint Open from Ordnance Survey
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# Unpack
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# to codepo_gb/Data/*.csv
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# with columns (no headers): Postcode, Positional_quality_indicator, Eastings, Northings, Country_code, NHS_regional_HA_code, NHS_HA_code, Admin_county_code, Admin_district_code, Admin_ward_code
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unzip -n -d codepo_gb codepo_gb.zip
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# Filter
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# to codepo_gb/london_postcodes.csv
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# with columns: postcode, eastings, northings
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# "E09..." is London Borough prefix, used in Admin_county_code
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echo "postcode,x,y" > codepo_gb/london_postcodes_27700.csv
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grep -h '"E09' codepo_gb/Data/CSV/*.csv \
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| sed 's/["]//g' \
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| cut -f 1,3,4 -d "," \
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>> codepo_gb/london_postcodes_27700.csv
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# Transform
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# to epsg:4326
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rm -f codepo_gb/london_postcodes_4326.csv
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ogr2ogr -s_srs "EPSG:27700" -t_srs "EPSG:4326" \
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-oo X_POSSIBLE_NAMES=x -oo Y_POSSIBLE_NAMES=y \
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-oo KEEP_GEOM_COLUMNS=no \
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-f CSV \
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codepo_gb/london_postcodes_4326.csv \
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codepo_gb/london_postcodes_27700.csv \
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-lco GEOMETRY=AS_WKT
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# Coerce EPSG:4326 CRS
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sed -i 's/^\"POINT/\"SRID=4326;POINT/' codepo_gb/london_postcodes_4326.csv
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# Load
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cat codepo_gb/london_postcodes_4326.csv \
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| psql -c "COPY search_locations ( center, search_str ) FROM stdin WITH CSV HEADER;"
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