Computer Assisted Mass Appraisal (CAMA) Database, MD Property View 2004, Baltimore City

The CAMA (Computer Assisted Mass Appraisal) Database is created on a yearly basis using data obtained from the State Department of Assessments and Taxation (SDAT). Each yearly download contains additional residential housing characteristics as available for parcels included in the CAMA Database and the CAMA supplementary databases for each jurisdiction.. Documentation for CAMA, including thorough definitions for all attributes is enclosed. Complete Property View documentation can be found at http://www.mdp.state.md.us/data/index.htm under the "Technical Background" tab. It should be noted that the CAMA Database consists of points and not parcel boundaries. For those areas where parcel polygon data exists the CAMA Database can be joined using the ACCTID or a concatenation of the BLOCK and LOT fields, whichever is appropriate. (Spaces may have to be excluded when concatenating the BLOCK and LOT fields). A cursory review of the 2004 version of the CAMA Database indicates that it has more accurate data when compared with the 2003 version, particularly with respect to dwelling types. However, for a given record it is not uncommon for numerous fields to be missing attributes. Based on previous version of the CAMA Database it is also not unlikely that some of the information is inaccurate. This layer was edited to remove points that did not have a valid location because they failed to geocode. There were 235 such points. A listing of the deleted points is in the table with the suffix "DeletedRecords." This is part of a collection of 221 Baltimore Ecosystem Study metadata records that point to a geodatabase. The geodatabase is available online and is considerably large. Upon request, and under certain arrangements, it can be shipped on media, such as a usb hard drive. The geodatabase is roughly 51.4 Gb in size, consisting of 4,914 files in 160 folders. Although this metadata record and the others like it are not rich with attributes, it is nonetheless made available because the data that it represents could be indeed useful. This is part of a collection of 221 Baltimore Ecosystem Study metadata records that point to a geodatabase. The geodatabase is available online and is considerably large. Upon request, and under certain arrangements, it can be shipped on media, such as a usb hard drive. The geodatabase is roughly 51.4 Gb in size, consisting of 4,914 files in 160 folders. Although this metadata record and the others like it are not rich with attributes, it is nonetheless made available because the data that it represents could be indeed useful.CAMA（计算机辅助大规模评估，Computer Assisted Mass Appraisal）数据库每年更新一次，其数据来源于马里兰州评估与税务局（State Department of Assessments and Taxation，缩写SDAT）。每年度的下载数据包会包含对应辖区内纳入CAMA数据库及CAMA辅助数据库的地块的可用额外住宅房产特征信息。CAMA的文档资料（涵盖所有属性的详尽定义）已随附提供。完整的房产视图文档可于http://www.mdp.state.md.us/data/index.htm网站的"技术背景"标签项下查阅。需注意，CAMA数据库存储的是点位数据，而非地块边界数据。对于存在地块多边形数据的区域，可通过ACCTID字段，或BLOCK与LOT字段的拼接结果（视具体情况选择合适方式）将CAMA数据库与该多边形数据关联，拼接BLOCK与LOT字段时可能需要移除其中的空格。对2004版CAMA数据库的初步检视显示，相较2003版，其数据准确性有所提升，尤其在住宅类型方面。但针对单条记录而言，多个字段缺失属性值的情况并不鲜见。基于过往版本的CAMA数据库经验，部分信息存在不准确的可能性亦不容忽视。本图层已进行编辑，移除了因地理编码失败而不具备有效位置的点位，共计235个。已删除点位的列表存储于后缀为"DeletedRecords"的表中。本元数据记录属于指向某地理数据库的221条巴尔的摩生态系统研究元数据记录集合之一。该地理数据库可在线获取，且体量较大。经申请并达成特定安排后，可通过USB硬盘等介质寄送该数据集。该地理数据库总容量约为51.4GB，包含160个文件夹下的4914个文件。尽管本元数据记录及同类其他记录的属性字段并不丰富，但仍予以公开，因其所代表的数据确实具备实用价值。