UPDATE "public"."400_map_grid" SET geom = ST_SetSRID(geom, 4326);
ALTER TABLE "public"."400_map_grid" ALTER COLUMN geom TYPE geometry(MultiPolygon, 4326);

2977708.89153, 9976225.51161 - 3236908.88834, 10200225.50756

-97.97695, 29.92911 - -97.52100, 30.75366 (see attached image2).

-- Table: public."400_map_grid"
-- DROP TABLE public."400_map_grid";

CREATE TABLE public."400_map_grid"
(
gid integer NOT NULL DEFAULT nextval('"400_map_grid_gid_seq"'::regclass),
objectid bigint,
perimeter numeric,
grid_id character varying(20) COLLATE pg_catalog."default",
geom geometry(MultiPolygon),
CONSTRAINT "400_map_grid_pkey" PRIMARY KEY (gid)
)
WITH (
OIDS = FALSE
)
TABLESPACE pg_default;

ALTER TABLE public."400_map_grid"
OWNER to postgres;

-- Index: 400_map_grid_geom_idx
-- DROP INDEX public."400_map_grid_geom_idx";

CREATE INDEX "400_map_grid_geom_idx"
ON public."400_map_grid" USING gist
(geom)
 TABLESPACE pg_default;