July-August 2019

GIM July/August 2019 cover

This issue of GIM International has a special focus on Lidar technology, with applications ranging from agriculture to archaeology. The front cover image shows very detailed 3D Lidar data that accurately depicts the landscape. The survey was conducted along a 47-kilometer segment of the M1 highway in northwestern Hungary. (Courtesy: YellowScan). This magazine contains, amongst other stories, the following articles:

P. 13 Mapping a University Campus in Brazil
P. 19 Automatic Lidar Point Cloud Segmentation
P. 23 UAS Lidar Survey over an Ancient Pueblo Site
P. 26 Sensor Fusion for Precision Agriculture
P. 30 User-friendly Remote Sensing Data Infrastructure in France

UAS Lidar Survey over an Ancient Pueblo Site

UAS Lidar Survey over an Ancient Pueblo SiteArchaeologists have been studying the Sand Canyon Pueblo in Colorado, USA, for decades. Today, painstaking traditional mapping and visualizations no longer suffice for detailed studies. A survey combining a UAS with Lidar has shown how accurate and dense point clouds enable the discovery of previously undocumented structures. However, conducting a UAS Lidar survey requires thorough knowledge and skills, as the author convincingly demonstrates. Read on...

Sensor Fusion for Precision Agriculture

Sensor Fusion for Precision AgriculturePrecision agriculture has considerably benefited from the use of UAVs, often combined with active ranging sensors like Lidar to gather information from underneath the crops, but existing systems are relatively expensive for the farming sector. In this project, researchers in Canada have used an integrated sensor orientation method for the local referencing of Lidar measurements. Read on...

Lidar Point Cloud Segmentation

Automatic Lidar Point Cloud SegmentationTerrestrial Lidar data has great potential to produce measurements for as-built BIM. Unfortunately, processing hundreds of millions of points, often contaminated by substantial noise, can be tedious and time-consuming. This article describes normal variation analysis (Norvana) segmentation – an automatic method that can segment large terrestrial Lidar point clouds containing hundreds of millions of points within minutes. Read on...

User-friendly Remote Sensing Data Infrastructure in France

User-friendly Remote Sensing Data Infrastructure in FranceOver the past decade, Geosud has contributed to successfully mitigating the various obstacles to the operational use of satellite imagery for environmental management and territorial development. Geosud’s role in the project will soon come to an end but the services will continue, embedded in an even better infrastructure: Dinamis. As of next year, Dinamis will provide satellite images of land, sea, air or underground, and even online image processing, for organizations related to the public sector in France. Read on...

Join GIM International

Follow GIM International on Facebook, LinkedIn, Twitter or sign up for the newsletter! Don't miss the latest developments: join GIM International!