14 KiB
Administrative regions geocoder - Level 1
Function
Accepts a list of terms. Terms are searched against the name_ column in admin1_synonyms_qs. The name_ column is an automatically cleaned and populated column based on the raw values in name . The synonym table returns the proper global_id (based on rank values in table below). The global_id is then matched against the single row in the adm1 table to return the correct polygon(s).
Creation steps
- Upload fresh Quattro Shapes admin1 data to
qs_adm1table. - Upload fresh Quattro Shapes admin1 region data to
qs_adm1_regiontable. - Upload fresh Natural Earth admin1 states provinces data to
ne_admin1_v3 - If fresh, add all
sql/indexes.sqlandsql/triggers.sql - Run the
sql/build_data_table.sqlscript. - Run the
sql/build_admin1_synonyms.sqlscript. - If needed, load or replace the function with
sql/geocoder.sql
Tables
Some tables involved in the creation of this geocoder which are not used by the geocoder functions are qs_adm1, ne_admin1_v3 and qs_adm1_region, which are obtained directly from the source.
admin1_synonyms
Table structure
Table "public.admin1_synonyms"
Column | Type | Modifiers | Storage | Stats target | Description
----------------------+--------------------------+-----------------------------------------------------------------------+----------+--------------+-------------
cartodb_id | integer | not null default nextval('untitled_table_1_cartodb_id_seq'::regclass) | plain | |
name | text | | extended | |
rank | double precision | | plain | |
created_at | timestamp with time zone | not null default now() | plain | |
updated_at | timestamp with time zone | not null default now() | plain | |
the_geom | geometry(Geometry,4326) | | main | |
the_geom_webmercator | geometry(Geometry,3857) | | main | |
adm0_a3 | text | | extended | |
name_ | text | | extended | |
global_id | integer | | plain | |
Current indexes
Indexes:
"untitled_table_1_pkey" PRIMARY KEY, btree (cartodb_id)
"idx_admin1_synonyms_name" btree (name)
"idx_admin1_synonyms_name_" btree (name_)
"idx_admin1_synonyms_name_adm0" btree (name_, adm0_a3)
"idx_admin1_synonyms_rank" btree (rank)
"untitled_table_1_the_geom_idx" gist (the_geom)
"untitled_table_1_the_geom_webmercator_idx" gist (the_geom_webmercator)
adm1
Table structure
Table "public.adm1"
Column | Type | Modifiers | Storage | Stats target | Description
----------------------+--------------------------+------------------------------------------------------------------------+----------+--------------+-------------
cartodb_id | integer | not null default nextval('untitled_table_2_cartodb_id_seq1'::regclass) | plain | |
name | text | | extended | |
description | text | | extended | |
created_at | timestamp with time zone | not null default now() | plain | |
updated_at | timestamp with time zone | not null default now() | plain | |
the_geom | geometry(Geometry,4326) | | main | |
the_geom_webmercator | geometry(Geometry,3857) | | main | |
global_id | integer | | plain | |
Current indexes
Indexes:
"untitled_table_2_pkey1" PRIMARY KEY, btree (cartodb_id)
"untitled_table_2_the_geom_idx1" gist (the_geom)
"untitled_table_2_the_geom_webmercator_idx1" gist (the_geom_webmercator)
admin1_synonyms
Table structure
Table "public.admin1_synonyms"
Column | Type | Modifiers | Storage | Stats target | Description
----------------------+--------------------------+-----------------------------------------------------------------------+----------+--------------+-------------
cartodb_id | integer | not null default nextval('untitled_table_1_cartodb_id_seq'::regclass) | plain | |
name | text | | extended | |
rank | double precision | | plain | |
created_at | timestamp with time zone | not null default now() | plain | |
updated_at | timestamp with time zone | not null default now() | plain | |
the_geom | geometry(Geometry,4326) | | main | |
the_geom_webmercator | geometry(Geometry,3857) | | main | |
adm0_a3 | text | | extended | |
name_ | text | | extended | |
global_id | integer | | plain | |
Current indexes
Indexes:
"untitled_table_1_pkey" PRIMARY KEY, btree (cartodb_id)
"idx_admin1_synonyms_name" btree (name)
"idx_admin1_synonyms_name_" btree (name_)
"idx_admin1_synonyms_name_adm0" btree (name_, adm0_a3)
"idx_admin1_synonyms_rank" btree (rank)
"untitled_table_1_the_geom_idx" gist (the_geom)
"untitled_table_1_the_geom_webmercator_idx" gist (the_geom_webmercator)
admin1_decoder - planned deprecation
Table structure
Table "public.admin1_decoder"
Column | Type | Modifiers | Storage | Stats target | Description
----------------------+--------------------------+---------------------------------------------------------------------+----------+--------------+-------------
name | text | | extended | |
admin1 | text | | extended | |
iso2 | text | | extended | |
geoname_id | integer | | plain | |
cartodb_id | integer | not null default nextval('admin1_decoder_cartodb_id_seq'::regclass) | plain | |
created_at | timestamp with time zone | not null default now() | plain | |
updated_at | timestamp with time zone | not null default now() | plain | |
the_geom | geometry(Geometry,4326) | | main | |
the_geom_webmercator | geometry(Geometry,3857) | | main | |
synonyms | text[] | | extended | |
iso3 | text | | extended | |
users | double precision | | plain | |
Current indexes
Indexes:
"admin1_decoder_pkey" PRIMARY KEY, btree (cartodb_id)
"admin1_decoder_the_geom_idx" gist (the_geom)
"idx_admin1_decoder_admin1" btree (admin1)
"idx_admin1_decoder_geoname_id" btree (geoname_id)
"idx_admin1_decoder_iso2" btree (iso2)
"idx_admin1_decoder_iso3" btree (iso3)
"idx_admin1_decoder_name" btree (name)
"the_geom_webmercator_3b4ba2fe_9d91_11e3_bb72_7054d21a95e5" gist (the_geom_webmercator)
Functions
test_geocode_admin1_polygons
Schema | Name | Result data type | Argument data types | Type
--------+------------------------------+--------------------------------+--------------------------------+--------
public | test_geocode_admin1_polygons | SETOF geocode_admin_country_v1 | names text[], country text[] | normal
public | test_geocode_admin1_polygons | SETOF geocode_admin_v1 | name text[] | normal
public | test_geocode_admin1_polygons | SETOF geocode_admin_country_v1 | name text[], inputcountry text | normal
geocode_admin1_polygons
Schema | Name | Result data type | Argument data types | Type
--------+-------------------------+--------------------------------+--------------------------------+--------
public | geocode_admin1_polygons | SETOF geocode_admin_country_v1 | names text[], country text[] | normal
public | geocode_admin1_polygons | SETOF geocode_admin_v1 | name text[] | normal
public | geocode_admin1_polygons | SETOF geocode_admin_v1 | name text[], inputcountry text | normal
Data Sources
(see the wiki page: Geocoder Data Sources #admin1-states-provinces)
-
Quattro Shapes admin1 and admin1 region polygons are being used for geometry. Users dislike natural earth's small admin1 units in countries like Spain, Italy and France so we have replaced these smaller units with their parent regions.
-
Natural Earth admin1 alternate name spellings will be used as synonyms when the Quattro Shapes
qs_source= 'Natural Earth'.
Admin1 Geometry Table
The table name is currently being called adm1 and is built from a combination of data from Quattro Shapes: qs_adm1 and qs_adm1_region. All countries that contain regional admin1 provinces use geometry from the qs_adm1_region table and not the qs_adm1 table. This is an improvement made based on tickets/issues submitted by users when geocoding admin1 states / provinces.
Admin1 Synonyms Table
The table contains the following columns to be populated:
-
adm0_a3 : ISO code for the region. Used to get the unique geometry for the region in terms of the synonym.
-
name: Actually, the synonym you want to include for a specific region (identified ad adm0_a3).
-
rank: Rank of the synonym being matched to. 0 is highest.
-
global_id Unique identifier created in
build_data_table.sql.
Ranks
| rank number | origin data | origin column | description |
|---|---|---|---|
| 0 | Quattro Shapes | qs_a1 | default name for qs_adm1 |
| 0 | Quattro Shapes | qs_a1r | default name for qs_adm1_region |
| 1 | Quattro Shapes | qs_a1_lc | admin code |
| 2 | Natural Earth | name_alt | alternate spelling |
| 3 | Natural Earth | abbrev | abbreviation |
| 4 | Natural Earth | postal | postal code |
| 5 | Natural Earth | gn_name | formal english name |
| 6 | Natural Earth | woe_label | woe label name |
| 7 | TIGER | stusps | Abbreviation (USA only) |
Known issues
admin1_decodertable which is meant to be depreacted is being used in other geocoders, as namedplaces
Historic:
- [24/06/2015]:
- Updated Readme: add information for tables, functions, indexes and known issues section
- Reviewed functions and uploaded the ones in production