2016 SoE Built Environment Mean house to block size ratios by SA1, Adelaide urban centre locality - 2010

Map and 2010 data from Australian Bureau of Statistics (ABS) Land Account: South Australia, Experimental Estimates, 2006-2011 (cat. No. 4609.4.55.001) http://www.abs.gov.au/ausstats/abs@.nsf/Latestproducts/4609.4.55.001Feature%20Article1002006%20-%202011?opendocument&tabname=Summary&prodno=4609.4.55.001&issue=2006%20-%202011&num=&view=\r\n\r\nData tables list 2011 SA1s within the 2011 Adelaide Urban Centre/Locality with property area calculations for specified time periods (1990 - 2014), as well corresponding mean building size and mean building size to property area ratio based on 2014 Valuer-General data. The VG data is from a single point in time and contains information for properties as of 2014. (eg. including extensions/renovations or where subdivision has been undertaken, which would include any increases in floor area or decreases in land area that occurred as a result of these). The VG oversee valuations for State Government property transactions and the making and return of council rating valuations. The primary data items used include Land Use, Property Area, Equivalent Main Area and Year built. "Equivalent main area" is the total area under the main roof excluding area of eg. carports, garages, verandahs etc. rather than the building footprint. Only landuse codes with a classification of "Private" were included in the analysis. State Office Land Use Classification 2007 was used to analyse Valuer General data. Only records classified as Single Unit Houses (land use code 1100-1119) were included in the analysis (80% of VG records), but this will include multistory houses. Because the area calculation for multistory houses could exceed the size of the land parcel, a "MeanAreaRatio_adj field has been included - Where the Pre1980_MeanAreaRatio for a property is greater than 100.0, then this has been adjusted down to 100.0 The analysis was restricted to Private Single Unit Houses (excluding multiple unit dwellings and commercial buildings) in an effort to enable the data to be used to understand residential backyard sizes and how these have changed over time. Note that although the figure heading notes a year range of 1990-2014 the original output dataset for Statistical Area Level 1 s(SA1) included records with a null year field (326 records) as well as records dating back to 1838.\r\n\r\nMap relates to Figure BLT24 in the Built environment theme of the 2016 State of the Environment Report, available at http://www.soe.environment.gov.au\r\n\r\nThe map service can be viewed at http://soe.terria.io/#share=s-sB5VcuCdJXg9TdCi3nz3FT0eojG\r\n\r\nDownloadable spatial data also available below.

本数据集的地图与2010年数据来源于澳大利亚统计局（Australian Bureau of Statistics, ABS）《南澳大利亚土地核算：实验性估算，2006-2011年》（目录号4609.4.55.001），详情链接为：http://www.abs.gov.au/ausstats/abs@.nsf/Latestproducts/4609.4.55.001Feature%20Article1002006%20-%202011?opendocument&tabname=Summary&prodno=4609.4.55.001&issue=2006%20-%202011&num=&view=

数据表格涵盖2011年阿德莱德城市中心/区域内的2011版统计区域1级单元（Statistical Area Level 1, SA1），包含1990-2014年指定时间段的物业面积测算结果，以及基于2014年估值总长（Valuer-General, VG）数据计算得到的对应平均建筑规模与平均建筑规模/物业面积比。VG数据取自单一时间节点，涵盖2014年时点的全部物业信息（例如包含扩建、翻新或地块细分所带来的建筑面积增加或土地面积减少情况）。VG负责州政府物业交易估值，以及市政评级估值的制定与报送。本次分析采用的核心数据项包括土地用途、物业面积、等效主建筑面积（Equivalent Main Area）与建造年份。其中“等效主建筑面积”指主屋顶下的总面积，不含车棚、车库、露台等附属区域，而非建筑占地面积。分析仅纳入分类为“私有”的土地用途编码。本次分析采用2007年州办公土地用途分类标准处理VG数据。仅纳入单户住宅（Single Unit Houses）类记录（土地用途编码区间为1100-1119，占VG总记录数的80%），该类别包含多层住宅。由于多层住宅的面积测算结果可能超出地块规模，故设置了“MeanAreaRatio_adj（调整后平均面积比）”字段：当某物业的Pre1980_MeanAreaRatio（1980年前建造物业的平均面积比）大于100.0时，将其值下调至100.0。为便于利用该数据探究住宅后院面积及其随时间的变化趋势，本次分析仅限定于私有单户住宅（排除多单元住宅与商业建筑）。需注意：尽管图表标题标注的年份范围为1990-2014年，但原始统计区域1级单元（SA1）数据集同时包含年份字段为空的记录（共326条），以及可追溯至1838年的历史记录。

本地图对应2016年《环境状况报告》建筑环境主题下的图件BLT24，该报告可于http://www.soe.environment.gov.au查阅。

该地图服务可通过以下链接查看：http://soe.terria.io/#share=s-sB5VcuCdJXg9TdCi3nz3FT0eojG

可下载的空间数据亦于下方提供。