Meshblock 2006

Statistics New Zealand maintains an annual meshblock patternfor the collection and production of statistical data, allowing data to be compared over time. A meshblock is the smallest geographic unit used by Statistics New Zealand for which statistical data is collected and processed by statistics New Zealand. A meshblock is defined by a geographic area, varying in size from a part of a city block to large areas of rural area. Each meshblock abuts against another to form a network covering all of New Zealand, including coasts and inlets and extending out to the 200 mile economic zone. Meshblocks are added together to build up lager geographic areas such as area units and urban areas. They are also the principal unit to draw and define electoral districts, territorial authorities and regional councils. Meshblocks are allocated a unique seven-digit number. The first 5 digits are unique, and refer to the original 1976 meshblock code. The two end numbers refer to sequential meshblock splits to the original meshblock. When a meshblock is split the final two digits of the original meshblock number are changed. Exceptions to this rule are a small number of meshblocks where there are no more numbers in the sequence are available. There are therefore some meshblocks in Auckland and Tauranga City starting with 32xxxxx. Statistics New Zealand maintains a concordance file to ensure that boundaries relating to earlier meshblock patterns can also be generated.The dataset is intended for use in the display and presentation of statistical and other data to show areas of high or low density and distributions for comparative purposes over time. The digital boundaries are defined by Statistics New Zealand. They are maintained on behalf of Statistics New Zealand by Land Information New Zealand in Landonline using ArcInfo.Meshblocks cover the land area of New Zealand, the water area to the 12 mile limit, Chatham Islands, the Kermadec Islands, off-shore oil rigs, Ross Dependency and extend to the 200 mile economic zone. The meshblocks for the last four mentioned areas have not been digitised. The 12 mile limit is digitised.Meshblock boundaries generally follow street centre-lines, cadastral property boundaries or topographical features (eg rivers). Expanses of water in the form of lakes and inlets are defined separately from land.The annual pattern of digital boundaries is used for the full calendar year from 1 January and applies to the timing of the survey –not necessarily when the data is processed. Digital Boundary data became freely available on 1stJuly 2007.新西兰统计局（Statistics New Zealand）维护年度统计区域单元（meshblock）模式，用于统计数据的采集与编制，以实现跨时间的数据对比。统计区域单元是新西兰统计局用于统计数据采集和处理的最小地理单元，其被定义为一片地理区域，规模跨度极大，可从城市街区的一部分延伸至大片乡村区域。每个统计区域单元均与其他单元邻接，共同构成覆盖新西兰全境的地理网络，涵盖海岸、海湾，并延伸至200海里经济区。 可将多个统计区域单元合并，以构建更大的地理区域，例如区域单元（area units）与城市区域。它们同时也是绘制并界定选举选区、地方当局（territorial authorities）及区域议会（regional councils）的核心单元。统计区域单元被分配唯一的7位数字编码：前5位具有唯一性，对应1976年起的原始统计区域单元编码；末尾两位代表针对原始统计区域单元的连续拆分编号。当某一统计区域单元被拆分时，其原始编码的最后两位数字将发生变更。该规则存在少数例外情况：部分统计区域单元的序列编号已用尽，因此奥克兰和陶朗加市存在少量以32开头的7位编码统计区域单元。 新西兰统计局维护有一致性对照表（concordance file），以确保也可生成与早期统计区域单元模式相关的边界数据。本数据集旨在用于展示和呈现统计及其他类型数据，以呈现高、低密度区域及其分布情况，用于跨时间对比分析。数字边界由新西兰统计局界定，由新西兰土地信息局（Land Information New Zealand）代表新西兰统计局在Landonline平台中使用ArcInfo进行维护。 统计区域单元覆盖新西兰陆地面积、12海里范围内的水域、查塔姆群岛、克马德克群岛、近海石油钻井平台以及罗斯属地，并延伸至200海里经济区。上述最后提及的四类区域的统计区域单元尚未完成数字化，而12海里范围内的水域边界已完成数字化。 统计区域单元的边界通常遵循街道中心线、地籍宗地边界或地形特征（例如河流）。湖泊与海湾等大片水域与陆地区域分别进行界定。年度数字边界模式适用于完整日历年（自1月1日起），且对应调查的时间节点——而非数据处理的实际时间。数字边界数据于2007年7月1日起免费对外开放获取。