Documenting London’s boroughs to solve parking problem

Author:Penny Boviatsou

花费数小时在繁忙的城市道路和停车场上寻找停车位是一件严重的事情。全世界的城市一直在浪费燃料的问题上挣扎，排放量加起来，加上狩猎停车的经济和非经济影响。

停车应用技术正在上升，为用户提供无现金付款，并帮助驾驶员查找和预订停车位并避免停车票。

AppyParking是一家位于伦敦的Kerbside Management and Mobility技术公司，经营award-winning parking appthat allows users to see and understand all on-street parking areas, restrictions and operating hours in addition to off-street car parks, helping users make informed choices about where to park before they arrive.

“We’re on a mission to make parking forgettable for drivers by providing the best on-street parking information so they can find the nearest and cheapest options for where they want to go. We also work closely with local authorities to help them better manage their kerbside assets with data-driven solutions that improve compliance and safe access for drivers and businesses,”said Dan Hubert, CEO and founder of AppyParking.

AppyParking needed to survey London’s kerbsides to创建所有停车区的准确地图across the capital. The parking company approachedGetMapping PLC, a leading provider of aerial photography, mobile mapping, LiDAR, digital mapping and web-based services across Europe and Africa, to undertake mobile mapping surveys of car parking zones across London.

With more than 20 years of experience in capturing and processing large volumes of geospatial data, Getmapping invested in twoLeica Pegasus:Two Ultimatemobile mapping systems to survey London’s boroughs forthe largest mobile mapping project in Europe.

通过移动映射捕获有效的数据

Project planning was crucial for the project’s success. Getmapping wanted to ensure the project would run smoothly according to a plan. The initialcapture of parking data for six London boroughswas required in autumn 2017/18 with progressing phases through the first six months of 2018.

A team of three surveyors drove25 kilometres per daywith the Leica Pegasus:Two around London’s boroughs to simultaneously收集图像和激光雷达数据. Surveying was possible throughout winter months of poor light, and no surveyors or traffic management crews were needed in the road – all data was captured from the safety of the vehicle.

Once the data collection was completed, data was transferred back to the office in hard disks. Two team members processed the data using theLeica Pegasus：经理生成同时定位和映射（SLAM）校正的轨迹，以及全景图像和彩色点云。

“The progress of surveying methods and mobile mapping systems opens new perspectives for the collection of road data. With the Leica Pegasus:Two Ultimate we were able to smoothly collect data, travelling around the survey sites around London, with no traffic management or road closures required,”said Martin Tocher, group innovation director at Getmaping.

More data, faster

The capture of parking data in further13伦敦区started immediately and was completed by mid-year 2018.

GetMapping购买了一个Pegasus：两个终极的移动映射系统，并将现有的Pegasus升级到了两个终极版本，以完成该项目。PEGASUS：两个最终允许在各种照明条件和车辆速度下捕获 - 大型传感器与像素比和双光传感器可以实现更高的动态范围。随着12百万像素和板载JPEG压缩的增加，摄影测量和图像质量得到改善。

“The Leica Pegasus:Two Utlimate’s higher resolution camera system offered better picture quality, plus the dual fish-eye camera system provided ‘stitching free’”图片，” GetMapping欧洲运营经理Alexandre Alves说。“By utilising Leica Geosystems’ latest mobile mapping technology, which has three times the resolution compared to a standard system, the volume of data handled by Getmapping increased threefold, and we upscaled our processing resources to handle the huge volume of data that phase two required.”

后100 days of surveying, the results of the two phases were:

• Surveys of allparking zones across 19 London boroughsand five cities
• More than6,500-line km capturedin city environments with multiple passes to avoid data occlusions
• 1 million points of data每秒捕获
• 19 terabytes of raw data collected
• 52个数据的数据
• 27个每个受控停车区提取的功能
• 最终相对准确性比1.5厘米
• Final absolute精度优于4厘米
• 最大值 - 移动映射reduces the average survey timeby 80 per cent与传统的调查方法相比。

The captured imagery and point cloud data, along with associated feature extractions, enables AppyParking to deliverhigh definition traffic management data到他们的智能停车系统。GetMapping的移动地图团队提前提供了最终数据，还调查了布莱顿，剑桥，牛津，朴次茅斯和考文垂，以支持Appyparking的智能停车场。客户的期望是现在调查欧洲各地的城市。