Meshblock 2013

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，以实现跨时间维度的数据对比。统计区域单元是新西兰统计局用于采集和处理统计数据的最小地理单元，由特定地理范围划定，规模跨度极大，可小至城市街区的局部区域，大至广袤的乡村区域。所有统计区域单元彼此邻接，形成覆盖新西兰全境的地理网络，涵盖海岸、港湾，并延伸至200海里专属经济区。可通过合并统计区域单元，构建更大的地理区域，如区域单元（area units）与城市区域。同时，它们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。每个统计区域单元均被分配唯一的七位数字编码：前五位为唯一编码，对应1976年启用的原始统计区域单元编码；后两位代表该原始单元后续的连续拆分序列。当统计区域单元被拆分时，其原编码的最后两位数字将发生变更。仅极少数序列中已无可用编码的统计区域单元属于本规则的例外情形，因此奥克兰（Auckland）与陶朗加市（Tauranga City）存在少量以32开头的七位编码统计区域单元。新西兰统计局维护有一致性对照表文件（concordance file），以确保可复现早期统计区域单元模式对应的边界数据。本数据集旨在用于展示统计数据及其他相关信息，以呈现高密度或低密度区域的分布特征，用于跨时间的对比分析。该数字边界数据由新西兰统计局定义，由新西兰土地信息局（Land Information New Zealand）借助ArcInfo软件在Landonline平台代为维护。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（Chatham Islands）、克马德克群岛（Kermadec Islands）、近海石油钻井平台以及罗斯属地（Ross Dependency），并延伸至200海里专属经济区。但上述最后四类区域的统计区域单元尚未完成数字化，仅12海里范围内的水域边界已实现数字化。统计区域单元的边界通常沿街道中心线、地籍产权边界或地形特征（如河流）划定，湖泊与港湾等大片水域区域会与陆地区域分别界定边界。年度数字边界模式适用于自1月1日起的完整日历年，且对应普查的时间节点，而非数据处理的实际时间。数字边界数据于2007年7月1日正式免费对外开放。