what's the land area with seat of rcm being granby
CREATE TABLE "table1_1011906_1" (
  "regional_county_municipality_rcm" text,
  "population_canada_2011_census" real,
  "land_area" text,
  "density_pop_per_km2" text,
  "seat_of_rcm" text
);
SELECT "land_area" FROM "table1_1011906_1" WHERE "seat_of_rcm"='Granby';