Geometry Creation SQL


--('schema','name of table to add a column to','name of column to add',srid,'postgis geometry type',dimension)
--SELECT AddGeometryColumn ('public','recycling_dropoff_location','geom',26971,'POINT',2);

--SELECT AddGeometryColumn('public','recycling_dropoff_location','untransgeom',900913,'POINT',2)
--SELECT AddGeometryColumn('public','recycling_dropoff_location','untransgeom2',4326,'POINT',2)

--st_transform(st_setsrid(st_point(lat,long),900913),26971)
--three compound functions
--the innermost st_point(lon,lat) creates a geometry from an x and y location
--... watch the lat/lon distinctions the table im testing with appears to have them flip flopped
--the next outer function st_setserid( geometry to operate on, 900913) establishes the srid of the geometry
--... in this case I am assuming the unprojected google system 900913
--the outermost function st_transform( geometry to operate on, 26971) converts from one projection to another
--UPDATE recycling_dropoff_location
--SET geom = st_transform(st_setsrid(st_point(lon,lat),900913),26971)

--UPDATE recycling_dropoff_location
--SET untransgeom2 = st_setsrid(st_point(lon,lat),4326)

--UPDATE recycling_dropoff_location
--SET geom = st_setsrid(st_point(st_x(st_transform(untransgeom2,26971))*3.2808399,st_y(st_transform(untransgeom2,26971))*3.2808399),26971)

--SELECT st_asewkt( geom )
--FROM recycling_dropoff_location

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