Get_Tract

Get_Tract
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Name

Get_Tract — 도형이 위치해 있는 구역(tract) 테이블로부터 인구조사 구역 또는 현장(field)을 반환합니다. 기본적으로 구역의 축약된 명칭을 반환합니다.

Synopsis

text get_tract(geometry loc_geom, text output_field=name);

설명

도형을 입력받아 해당 도형이 위치한 인구조사 구역을 반환합니다. 공간 참조 시스템을 따로 설정하지 않을 경우 NAD83 경위도라고 가정합니다.


This function uses the census `tract` which is not loaded by default. If you have already loaded your state table, you can load tract as well as bg, and tabblock using the Loader_Generate_Census_Script script. If you have not loaded your state data yet and want these additional tables loaded, do the following UPDATE tiger.loader_lookuptables SET load = true WHERE load = false AND lookup_name IN('tract', 'bg', 'tabblock'); then they will be included by the Loader_Generate_Script.

This function uses the census tract which is not loaded by default. If you have already loaded your state table, you can load tract as well as bg, and tabblock using the Loader_Generate_Census_Script script.

If you have not loaded your state data yet and want these additional tables loaded, do the following

UPDATE tiger.loader_lookuptables SET load = true WHERE load = false AND lookup_name IN('tract', 'bg', 'tabblock');

then they will be included by the Loader_Generate_Script.

2.0.0 버전부터 사용할 수 있습니다.

기본 예시

SELECT get_tract(ST_Point(-71.101375, 42.31376) ) As tract_name;
tract_name
---------
1203.01

--this one returns the tiger geoid
SELECT get_tract(ST_Point(-71.101375, 42.31376), 'tract_id' ) As tract_id;
tract_id
---------
25025120301

참고

Geocode >

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