空降城市地图的新时代

Author:Penny Boviatsou

使用专业的工作流解决方案作为机载映射应用的一部分，与高端传感器技术一样重要。在城市环境中，这变得更加明显。它们受到快速变化的影响，因此对以下数据有更高的最新数据需求：

1. Navigation
2. Planning purposes and
3. Visualisation.

In addition, 3D mapping projects over metropolitan areas generate large amounts of data that need to be processed within reasonable timelines.

In order to meet the demand of mapping professionals’ efficient data collection and fast throughput without the loss of quality, Leica Geosystems has introducedLeica RealCity, a tightly integrated solution combining efficient imaging and LiDAR data collection with theLeica CityMapper有了大量生产的后处理工作流程，Leica HxMap。

Acquiring and processing LiDAR data across the US

Leica Geosystemspartnered with international asset integrity and geo-intelligence solutions provider, Fugro, to begin在美国的多个城市和沿海地区获取和处理数据。

Using CityMapper, Fugro conducted对北美一些人口最密集的城市中心进行的空中调查，以支持其地理空间映射服务。作为世界上第一个将倾斜和纳迪尔成像以及激光雷达系统组合为一种乐器的混合机载传感器，CityMapper可以通过一次飞行来收集成像和LIDAR数据，从而可以节省大量时间和成本。所有收集的激光雷达和成像数据都可以在一个统一的工作流解决方案Leica HXMAP中处理。

“We have a long history working with Leica Geosystems sensors, because they are so reliable. CityMapper has proven no different,”said Mike Wernau, Fugro program manager.“The platform's superior design, coupled with Leica Geosystems’ newest version of HxMap, amplifies our ability to create highly accurate, feature-rich geospatial content.”

空降调查的结果是使用最新版本的Leica HXMAP（统一的高性能多传感器工作流程）进行了后处理的。在处理其他Leica GeoSystems空中传感器的单个熟悉的界面中，所有典型的数据产品，从正射击和倾斜图像到点云，3D网格和模型，都可以快速有效地生成。bob综合app下载

The latest update of the common-sensor post-processing software sees the addition of LiDAR point cloud generation, calibration, strip matching and viewing to the current image processing capability. Leica HxMap version 2.2 also incorporates enhanced noise filtering for both CityMapper and Leica SPL100 single-photon LiDAR sensors.

“HxMap v2.2 is extremely powerful, as it establishes a single environment to process our CityMapper oblique and nadir imagery, point cloud and terrain data all at once,”said Wernau.“源自Lebob综合app下载ica Realcity工作流程的产品为我们的土地和财产解决方案的基础，为我们的州和地方政府，保险和土地利用管理的客户带来真正的价值。”

Exciting CityMapper results in Bordeaux

The city of Bordeaux is among France's most exciting, vibrant and dynamic cities. It is a port city on the Garonne River in the Gironde department in southwestern France. Together with its suburbs, Bordeaux is the centre of the Bordeaux Métropole with about 760,000 inhabitants.

Bordeaux is the world's major wine industry capital. It is home to the world's main wine fair, Vinexpo and the wine economy in the metro area takes in 14.5 billion euros each year. In 2007, after nearly a decade of infrastructure upgrades, Bordeaux was recognized by UNESCO as a World Heritage site for its vast Enlightenment-era urban core. After Paris, Bordeaux has the highest number of preserved historical buildings of any city in France.

2017年，一家公认的法国空中调查公司APEI（AéroPhoto Europe调查），专门使用创新技术和设备，专门研究地理空间数据，与De L'InformationGéogripeique（D.I.G.）De BordeauxMétropole一起工作，用于Bordeaux’s city mapping project. APEI deliveredaero三角斜图片与Leica Citymapper和Bordeaux一起捕获的将使用这些图像创建3D城市模型。

D.I.G. de Bordeaux Métropole is responsible for managing the reference layers of the Geographic Information System used in the Bordeaux metropolis. The project was flown inonly 2 days(10th and 11th March 2017) with a twin piston-engine Partenavia P68C, registered F-HPEI.

“该系统使用Leica Pav100和Leica Flightpro，这是Leica Airborn Common Platform的一部分。这使我们的员工非常容易操作，并且仅在2个小时内就进行了培训。我们使用了专门设计的Leica Podlifter将相机降低到PAV100中，以获取倾斜捕获的全视图。这是一个非常有用的功能，”said Bruno Callabat, CEO and technical manager, APEI.

Airborne reality capture

Looking at specific use cases and comparing the results of an image-generated point cloud with a point cloud generated from fused imaging and LiDAR data, the benefits are clear. In many countries up the 35 per cent of urban areas are covered with trees. As such the image point cloud is very dense on the buildings, however the digital elevation models of streets and surfaces under the trees are disturbed. In contrast, the CityMapper’s LiDAR penetrates through the trees and generates an accurate ground model with a flattened ground surface. In areas with shadows on the buildings or with irregular surfaces, the building edges in the image point cloud can be fluffy. With the fused imaging and LiDAR workflow, these edges are much sharper and the models are more accurate.

这是通过基于激光雷达的点云改善基于图像的点云的自然下一步，增加了准确性和其他信息，以帮助创建最佳的3D模型。随着城市环境发生如此迅速的变化，希望同时收集图像数据和激光雷达数据，这一要求诞生了Leica CityMapper，这是世界上第一个专门为城市规划应用而设计的混合机载传感器。同时收购Nadir和斜图像数据以及LiDAR数据提供了最具成本效益的方式，可以为城市规划师和从事城市地图的人生成全面的地理空间基础地图。