以记录速度绘制崩溃和碰撞

作者：Wendy Lyons

当您的犯罪现场位于洛杉矶大都会人口最密集的城市之一的一个繁忙十字路口中间时，您需要获得所需的东西。“它可能会变得很奇怪。”says investigator Weston Hadley, of the Santa Ana Police Department’s Collision Investigations Unit.

Until recently, Hadley and his fellow investigators had been using a theodolite for their forensic mapping. “定理石可以进行非常准确的测量。限制在于，它仅对您选择的项目进行数据点和测量，并且该过程可能很耗时，”他说。“We were shutting down major intersections for four, five hours at times to take200 to 400 data points。”像许多公共安全机构一样，圣塔安娜警察局（Santa Ana Police Departy）坚持使用过时的设备，因为预算中没有钱购买更快的技术。

如今，由于技术租赁使可以升级到最新的最新现实捕获解决方案，因此圣塔安娜警察局正在以创纪录的速度绘制绘制。亚博ag真人规律他们的全新Leica RTC360激光扫描仪正在捕获全部的scene—billions of highly accurate data points—inless than 30 minutes。新的激光扫描仪还会自动预注册点云数据，这使其易于使用并节省了更多的时间。

“我们的效率是如此重大，”哈德利说。由于定期发生致命的碰撞，效率很重要。“It just doesn't quit here in Santa Ana,”哈德利说。“自12月底以来，我们已经拥有Leica RTC360，[截至2019年6月]我们已经绘制了12个^th碰撞现场。”

哈德利说，RTC360是一个明显的选择。在看到它的行动之后，很明显，快速，敏捷和精确的3D现实捕获解决方案正在以不止一种方式获得回报。亚博ag真人规律“我们立即看到了它如何收集数据和速度的价值，”哈德利说。“But the cost savings and benefits go beyond that in so many ways.”

改善人员资源的使用

The RTC360 frees up patrol officers to respond to calls for service in a more timely manner.“We're a busy city, and when something goes down, especially in daylight and early evening hours, pulling five or six officers to block traffic puts an enormous strain on the resources we have available to handle calls for service. We're still going to get to those priority calls, but anything less than a priority is going to pend, and those patrol officers are going to sit for five, six hours until we finish the scene,”哈德利说。

With the RTC360 mapping不到30分钟的整个场景，对人员的压力得到了缓解。“The RTC360 provides a better service for the community because we can put our resources to better use than blocking roadways,”他说。

Opens roadways quicker for commuters

RTC360最大程度地减少了道路关闭对通勤公众的影响。“我记得几年前我们有一个场景。在最繁忙的十字路口之一，这是一次可怕的撞车事故，我们一直在高峰时段关闭它。我们有成千上万的人无法通过十字路口，这些人迟到了，没有让孩子准时上学。”他说。“那根本不会发生。”

提高警官的安全

RTC360通过危害时间减少时间来提高警官的安全。根据国家执法纪念基金的说法50名军官被杀in traffic-related incidents in 2018,14 were struck在他们的车辆外面。受损或分心的驾驶员在活跃的场景中耕作并不罕见。“我不得不多次跑出街头，”哈德利说。“Thankfully, we've never had any officers hit. We've had our cars hit. We've had buildings hit. We've had evidence hit. So the quicker we can get what we need and get out of that road and that right-of-way, the better.”

Reduces human oversight and errors

RTC360以每秒200万点捕获了视线中的所有事物。真主只能为操作员选择的对象获取数据点。即使收集平均200到400个数据点，也无法获得所有内容。

“有时候，我们会分心，或者只是一个如此大的复杂场面，我们可以忽略一条证据，”哈德利说。他记得一个案例，在回到办公室后，哈德利发现了理想仪官发生了故障。“It was an in-custody fatal DUI with a prior, so this guy's looking at a murder charge,”他解释说。“我们必须再出去两次，然后重新设置我最初放置设备的位置。”

The first time, he placed the theodolite in the most efficient spot for gathering all the data.“It wasn't the most efficient when I had to go back and try to shut down lanes. It was really in a bad spot,”他说。“那是一个真正的痛苦。”With the RTC360, Hadley can now walk away—after just minutes on scene—confident that the scanner captured everything with millimetre accuracy.“And I'm certain I'm not going to be making any trips back out to collision scenes,”他说。

Increases jurors’ decision-making ability

RTC360及其同伴场景重建软件授权陪审员做出更好的明智决定。以前，将真主党绘制的证据作为二维插图提交了法院。但是，通过将数百万个具有高动态范围（HDR）摄影的数据点以及地理标记的照片和注释覆盖RTC360提供了沉浸式360度，3D体验。数据是可接受的科学证据。

“Now we can really bring someone into the scene as we saw it that day in a way that a two-dimensional drawing could never anywhere approach,”哈德利说。“您可以谈论两辆汽车在每小时40英里（64公里）。从概念上讲，他们真的不知道发生剧烈碰撞时的外观（碎车，碎片场）可能是压倒性的。”

当他们的激光扫描案件到达法院时，陪审员将不再需要利用他们的想象力。他说：“我认为，当他们可以用自己的眼睛看到我们所看到的东西 - 发生的事情，能量以及所有这些事情的暴力时，这将产生更大的影响。”

与私营企业保持竞争环境

Forensic mapping experts in the private industry typically use state-of-the-art technology, especially for high-profile cases. Hadley believes it’s important for public safety agencies to maintain the same level of professionalism.“如果我们要在证词期间站在陪审团面前，谈论我们是什么出色的专家，以及我们拥有的所有经验和培训，并且我们正在使用的技术已经过时了，我认为这会破坏我们的初始消息，”他说。

它还可能破坏识别私人专家提出的不准确性或错误表征的能力。“如果我们不知道当前技术的局限性或细微差别，这可能会使我们处于劣势。”他说。“If we’re using current technology, at least gives us a starting point to say, ‘That is right’ or ‘That doesn't look right.’ Whereas if we don't have any experience in that technology, we basically can't say anything. Whatever they say is.”用RTC360记录场景keeps the agency at the forefront of mapping technologyand upholds their credibility in court.

缩小差距

Thanks to their new RTC360, the Collision Investigations Unit has closed its technology gap. Today, the Santa Ana Police Department is now at the leading edge of laser scanning technology and mapping at record speeds。“The Leica RTC360 makes us more efficient in so many ways,”哈德利说。“我认为，如果您真的抽了一下，看着众所周知的森林，那就走了，‘哇！我们为什么很长一段时间没有这样做？'”