"ref"=>"50","design"=>"three-level","line_attachment"=>"anchor"
"ref"=>"83","design"=>"one-level","tower:type"=>"branch","location:transition"=>"yes"
"ref"=>"3","design"=>"three-level","design:incomplete"=>"yes","endpoint:transformer"=>"yes"
"ref"=>"177","design"=>"two-level","technology"=>"GSM 1800","tower:type"=>"anchor"