mrsql = 'select "Lon" as Mrlon,"Lat" as Mrlat,"总采样点数" as CellMRCount,"栅格平均电平" as AvgeRSRQ,"Ci" as Ci,geom from "mrhuawei%s" where ST_Within("geom",ST_GeomFromText('%s', 4326))' % (city,r['band'])
selectmr = gpd.read_postgis(mrsql, con=engine,geom_col='geom')
