Chicago Historic Resources Survey - Red and Orange Buildings

The Chicago Historic Resources Survey (CHRS), completed in 1995, was a decade-long research effort by the City of Chicago to analyze the historic and architectural importance of all buildings, objects, structures, and sites constructed in the city prior to 1940. During 12 years of field work and follow-up research that started in 1983, CHRS surveyors identified approximately 9,900 properties which were considered to have some historic or architectural importance.

Please note that this CHRS dataset is limited and does not include the entire survey:

1. A color-coded ranking system was used to identify historic and architectural significance relative to age, degree of external physical integrity, and level of possible significance. This dataset only includes buildings identified with the two highest color codes: "Red" and "Orange." Buildings and structures coded "Red" or "Orange" (unless designated as a Chicago Landmark or located within a Chicago Landmark District) are subject to the City of Chicago’s Demolition-Delay Ordinance (link to: http://www.cityofchicago.org/city/en/depts/dcd/supp_info/demolition_delay.html), adopted by City Council in 2003.

2. Only buildings are included in this dataset; structures and objects such as bridges, park structures, monuments and mausoleums, generally are not represented. Likewise, garages, coach houses, and other secondary structures associated with a building may not be consistently depicted or color-coded. If an “Orange”- or “Red”-rated building was demolished after 2008, it may still appear in the map. The CHRS occasionally rated only part of a building or part of a group of joined buildings as “Orange” or “Red;” however the entire building or group of joined buildings may be incorrectly identified as “Orange” or “Red.”

Additional information about the CHRS is available at www.cityofchicago.org/Landmarks/ or by contacting the Historic Preservation Division at [phone].

To view or use these shapefiles, compression software and special GIS software, such as ESRI ArcGIS or QGIS, is required. To download this file, right-click the "Download" link above and choose "Save link as."

芝加哥历史资源调查（CHRS）于1995年完成，这是由芝加哥市政府发起的一项历时十年的研究工作，旨在分析至1940年之前在市内建造的所有建筑、物体、构筑物和地点的历史与建筑价值。在1983年开始的12年实地考察及后续研究中，CHRS调查员识别出约9,900处被认为具有一定历史或建筑价值的财产。

请注意，此CHRS数据集并非全面调查，存在以下限制：
1. 使用色彩编码体系对历史与建筑价值相对于其年代、外部物理完整度以及潜在重要性的程度进行识别。本数据集仅包括被标记为最高两个色彩编码——“红色”和“橙色”的建筑。标记为“红色”或“橙色”的建筑（除非被指定为芝加哥地标或位于芝加哥地标区）将受到芝加哥市政府的拆迁延缓条例（链接：http://www.cityofchicago.org/city/en/depts/dcd/supp_info/demolition_delay.html）的约束，该条例于2003年由市议会通过。
2. 本数据集仅包含建筑；如桥梁、公园构筑物、纪念碑和墓园等构筑物和物体通常不予以体现。同样，与建筑相关的车库、马车房和其他次要构筑物可能不会持续性地被描绘或色彩编码。若2008年之后拆除的“橙色”或“红色”评级建筑，仍可能出现在地图上。CHRS偶尔会仅对建筑的一部分或一组相连建筑的一部分进行“橙色”或“红色”评级；然而，整个建筑或一组相连建筑可能被错误地识别为“橙色”或“红色”。

有关CHRS的更多信息可在www.cityofchicago.org/Landmarks/或通过联系历史保护部门（电话：[phone]）获取。

要查看或使用这些形状文件，需要压缩软件和特殊GIS软件，例如ESRI ArcGIS或QGIS。要下载此文件，请右键点击上方的“下载”链接，然后选择“另存为”。