$webwork.htmlEncode($page.space.name) : Loading TIGER high-level-polygon state
This page last changed on Apr 04, 2006 by dblasby.
This one's easy if you've already done the counties dataset. This only takes a few minutes to produce: CREATE TABLE poly_state AS SELECT distinct substring(module from 1 for 5) as state_module from poly_county; ALTER TABLE poly_state ADD COLUMN gen_full geometry; UPDATE poly_state SET gen_full = ( SELECT buffer( collect(gen_full), 0) FROM poly_county WHERE poly_county.module like (poly_state.state_module || '%') ) ; --should all return 0 select count(*) from poly_state where gen_full isnull; select count(*) from poly_state where not(isvalid(gen_full)); Then add the names: alter table poly_state add column state_abrev text; alter table poly_state add column state_name text; update poly_state set state_abrev = ( select abrev from state_translation where state_translation.module = substring (poly_state.state_module from 4 for 2)); update poly_state set state_name = ( select state_translation.name from state_translation where state_translation.module = substring (poly_state.state_module from 4 for 2)); |
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Document generated by Confluence on Jan 16, 2008 23:28 |