elsif params['minlon'] and params['minlat'] and params['maxlon'] and params['maxlat']
bbox = h(params['minlon']) + ',' + h(params['minlat']) + ',' + h(params['maxlon']) + ',' + h(params['maxlat'])
else
elsif params['minlon'] and params['minlat'] and params['maxlon'] and params['maxlat']
bbox = h(params['minlon']) + ',' + h(params['minlat']) + ',' + h(params['maxlon']) + ',' + h(params['maxlat'])
else