DPD Initiated CAD Records

<p style='line-height:normal; margin-bottom:0in;'>This dataset contains DPD initiated CAD (Computer Aided Dispatch) records in the City of Detroit since September 20, 2016. This compliments the <a target='_blank' href='https://data.detroitmi.gov/datasets/detroitmi::police-serviced-911-calls/about' rel='nofollow ugc noopener noreferrer'>Police Serviced 911 Calls</a> dataset that is an internally generated equivalent to events reported by civilians that lead to a police response. Examples of records can include activities in which a law enforcement unit or officer initiates contact with the public. This can be to resolve, correct, or assist in a particular situation like helping a motorist, interviewing a witness, conducting a traffic stop, and engaging in foot pursuit.</p><p style='line-height:normal; margin-bottom:0in;'>&nbsp;</p><p style='line-height:normal; margin-bottom:0in;'>Each row in the dataset represents a DPD initiated record. These records detail when the call was entered, its nature, assigned priority level and DPD responding precinct/unit. When applicable, it also includes dispatch time, travel time, and total response times. Locations of the officer-initiated calls are reported based on the nearest intersection to protect the privacy of individuals. Records in this dataset that are of a more general nature may not have an associated location.&nbsp;</p><p style='line-height:normal; margin-bottom:0in;'>&nbsp;</p><p style='line-height:normal; margin-bottom:0in;'>Some records in the dataset with a Code Description of “Start of Shift Information” serve as routine informational purposes within DPD. Two other values that appear in the Code Description field frequently are Special Attention and Bus Boarding. Explanations of these values can be seen below.</p><p style='line-height:normal; margin-bottom:0in;'>&nbsp;</p><p style='line-height:normal; margin-bottom:0in;'>“Special Attention” records may be created for several reasons. Examples include check-ins with Project Green Light (PGL) partners, response to citizen requests such as people request notifying police when they are going out of town, wellness checks, when there has been a series of break-ins or other crimes in an area, or other concerns that prompt DPD to pay special attention to a location. Records may also be initiated by DPD for purposes related to the community.</p><p style='line-height:normal; margin-bottom:0in;'>&nbsp;</p><p style='line-height:normal; margin-bottom:0in;'>"Bus Boarding" records are entered into the system when the Transit Division of DPD boards a DDOT bus, as part of routine responsibilities. Typically, the officer’s partner trails the bus in their vehicle and picks up the other officer when the ride is over.</p><p style='line-height:normal; margin-bottom:0in;'>&nbsp;</p><p style='line-height:normal; margin-bottom:0in;'>Should you have questions about this dataset, you may contact the Commanding Officer of the Detroit Police Department's Crime Data Analytics at 313-596-2250 or <a>[e-mail]</a>. A DPD webpage provides <a target='_blank' href='https://detroitmi.gov/departments/police-department/report-crime' rel='nofollow ugc noopener noreferrer'>recommendations for reporting different types of crime.</a></p>

本数据集收录了2016年9月20日起底特律市范围内由底特律警察局（Detroit Police Department，DPD）发起的计算机辅助调度（Computer Aided Dispatch，CAD）记录。本数据集可作为<a target="_blank" href="https://data.detroitmi.gov/datasets/detroitmi::police-serviced-911-calls/about" rel="nofollow ugc noopener noreferrer">警用911接警记录</a>数据集的补充；后者为内部生成的、与平民上报并触发警方响应的事件对等的数据集。此类记录涵盖执法单位或警员主动与公众接触的各类场景，例如协助驾车人士、询问证人、实施交通拦截以及开展徒步追缉等，用于处置、纠正或协助解决特定事态。

本数据集每一行对应一条DPD发起的记录，详细记载了呼叫录入时间、事件性质、指派优先级以及DPD响应辖区/单位信息。若适用，还会包含调度耗时、行程耗时与总响应时长。为保护个人隐私，警员发起呼叫的位置以最近的路口标注；部分通用性较强的记录可能未关联具体位置。

本数据集中部分代码描述为「交班起始信息」的记录仅用于DPD内部日常信息通报。代码描述字段中另外两个高频取值为「特殊关注」与「巴士登车」，下文将对这两类取值进行说明。

「特殊关注」记录的创建存在多种场景，例如与「绿光灯项目（Project Green Light，PGL）」合作方进行签到、响应市民诉求（如市民请求在其外出期间通知警方）、健康检查、针对某区域发生多起入室盗窃或其他犯罪的处置，或其他促使DPD对特定地点予以特殊关注的事由。此类记录也可由DPD出于社区相关目的主动发起。

「巴士登车」记录由DPD交通分局在登乘底特律交通局（Detroit Department of Transportation，DDOT）巴士时录入，属于日常工作职责范畴。通常情况下，警员的搭档会驾车尾随巴士，并在行程结束后接回该警员。

若您对本数据集存在疑问，可致电313-596-2250或发送邮件至<a>[e-mail]</a>联系底特律警察局犯罪数据分析部门主管。底特律警察局官方网页还提供<a target="_blank" href="https://detroitmi.gov/departments/police-department/report-crime" rel="nofollow ugc noopener noreferrer">各类犯罪的报案指引</a>。