Deficit Zone Dentist District

Low with deficit zone of dentists at district level (800m and 10 min walk). The deficit zone is the residential area that represents the inverse of the given range zone. This data layer is updated annually in January, provided that the facility is managed and updated annually by the relevant sector/service. The facility has a certain range based on walking distance, taking into account important barriers (water, ring, highway, rail,...) and safe crossings for vulnerable road users (tunnels, bridges, pedestrian crossings with traffic lights). A neighborhood and neighborhood facility gets a walking distance of respectively 400 meters and 800 meters (respectively 5 and 10 min walk). Facilities that function on district (district or postcode) have a range of 1600 meters (20 min walking or 8 min cycling). The shortfall zone of the facility represents those residential areas (including the planned residential areas) that are outside the range (400 or 800m and 1600m) of a facility. In order to eliminate the deficit zone, new facilities should be installed in the vicinity of this deficit zone. The policy can thus plan a balanced spatial distribution of facilities based on walking distance.

区级牙医服务设施存在服务短缺区（deficit zone），该类区域的步行可达阈值为800米（对应10分钟步行路程）。所谓服务短缺区，指的是处于给定服务覆盖范围之外的居住区域，即服务覆盖区的反向区域。该数据图层（data layer）每年1月更新，前提是相关主管部门或服务机构已按年度对设施进行运维与更新。设施的步行服务范围需结合各类步行可达性障碍因素划定，包括水域、环路、高速公路、铁路等，同时需兼顾弱势道路使用者（vulnerable road users）的安全过街需求，如隧道、桥梁、带交通信号灯的人行横道等。邻里级设施与社区级设施的步行服务范围分别为400米（5分钟步行路程）与800米（10分钟步行路程）；区级（行政区或邮政编码区划）设施的服务范围则为1600米（20分钟步行或8分钟骑行路程）。设施的服务短缺区指处于对应设施服务范围（400米/800米或1600米）之外的居住区域，含规划居住区域。为消除服务短缺区，需在该区域周边增设新的牙医服务设施，相关政策制定者可据此基于步行可达性规划设施的空间均衡布局。