Fundamentals to Clustering 3D Point Cloud Data

Why is unsupervised segmentation the key to sustainable automation? Automation in point cloud data processing is central for building efficient decision-making systems and to cut labour costs. The identification of objects of interest in these massive datasets constitutes the basis of many applications. While new supervised deep-learning architectures show promising results, the amount of available labelled 3D data is often insufficient for a good generalization. This is where unsupervised approaches and clustering shine. What is data clustering? Clustering algorithms allow data to be partitioned into subgroups, or clusters, in an unsupervised manner. Intuitively, these segments group similar observations together. Clustering... (read more)
2020-07-13 01:12:11

Handheld Land Administration Mapping Methods in Kenya

Institution of Surveyors of Kenya Demonstrates Alternative Approaches
Fit-for-purpose approaches to land administration have been tested in Kenya, with a focus on the provision of land titles with inclusiveness for all in an approach that is affordable, fast and ‘good enough’. Earlier this year a group of Kenyan surveyors performed a field test in Makueni County, collecting land data using handheld devices. This first test was a learning experience; a more comprehensive test must be conducted to prove the scalability of the approach. The fit-for-purpose approach recommends the use of ‘visual boundaries’ to identify the delineation of land rights. There are many naturally visible boundaries in rural areas... (read more)
2017-06-01 08:57:27

The Evolution of FLEPOS 3.0

Next-generation Real-time Network for Flanders
A continuously operating reference station (CORS) provides GNSS data to support very accurate 3D positioning and additional geophysical applications. Flemish Positioning Services (FLEPOS) is the real-time global navigation satellite system (GNSS) CORS network for the Flanders region in northern Belgium. This article outlines the evolution of the next generation of the real-time network, FLEPOS 3.0. FLEPOS is part of Informatie Vlaanderen, a Flanders public administration organization. The first version of FLEPOS was established in 2002. Between 2002 and 2018, FLEPOS evolved through version 2.0 into the current FLEPOS 3.0 RTK real-time network (RTN) thanks to support from the Trimble Network... (read more)
2020-05-07 10:19:49

Proving the Rescue Potential of Multi-sensor UAVs

Venturing into Disaster Zones
When disaster strikes, the courage and experience of rescue task forces is put to the test. They face heading into the unknown every time they enter a terrain during a rescue mission. Efforts to implement the latest technological tools, such as unmanned aerial vehicles (UAVs), to support their work are aimed at providing safer working conditions for rescue teams and speeding up search activities to improve the efficiency of the entire rescue mission. UAV reconnaissance is considered a very powerful way of overcoming the potentially dangerous lack of information in affected areas. Specially equipped unmanned aerial vehicles (UAVs or ‘drones’)... (read more)
2018-03-15 10:55:18

A Glimpse of the Geospatial Future: Insights from Intergeo 2018

There is an abundance of data today, but how can it be processed, visualised and analysed to deliver real business benefits? We are in the midst of a digital transformation, and words such as Internet of Things, artificial intelligence and smart cities have become part of our everyday vocabulary, but which opportunities will digitalisation really create for society? And is the unmanned aerial vehicle (UAV or ‘drone’) truly democratising the geospatial industry? These are just some of the questions that may have crossed the minds of visitors to Intergeo 2018 in Frankfurt. And if they spoke to the right exhibitors... (read more)
2018-11-15 03:25:57

Low-cost 3D Scanning Solution for High-value Deliverables

Matterport’s platform approach provides simple, economical access to immersive technology and 3D visualization
Professionals across the architectural, engineering and construction disciplines have long understood the importance of visualisation in planning and executing building projects. Visual tools such as drawings, photos and more recently 3D scanning, imagery and computer-generated models enable architects, contractors and owners to develop deep understanding of on-site conditions. Accurate information is essential in developing designs and strategies to produce great results. (This article is brought to you by Matterport) But high quality imagery and 3D data is not easy to come by. The need to capture and share realistic visual data has driven a series of significant technological advances. In... (read more)
2018-04-26 11:09:02

Comparing DIM and TLS

Capturing an Archaeological Site in Oman
Photogrammetry and terrestrial laser scanning (TLS) are both proven technologies for archaeological documentation. Dense image matching (DIM) has evolved rapidly since 2010 and enables the highly automatic creation of detailed point clouds from overlapping imagery. How well does DIM perform for archaeological applications compared to TLS? The authors go in search of an answer. The necropolis of Al-Ayn in Oman (Figure 1) comprises 19 well-preserved tombs of between 2m and 4m in height which extend over 130m (Figure 1). Since 1988 the tombs have been a UNESCO World Heritage site. The exterior diameters of the slightly conical tombs range from... (read more)
2017-12-20 09:58:55

5 Challenges When Selecting Drones for Mapping

The Importance of Working with the Right Equipment
Every mapping project is unique; even within the same industry, each project will have its own distinct challenges. Selecting the right equipment is therefore key to getting the job done. Unmanned aerial vehicles (UAVs or ‘drones’) have emerged as a solution for many mapping and surveying projects. This article elaborates on five important challenges that should be considered when finding out which type of drone is the best fit. The article includes practical examples based on a recent mapping project on Silhouette Island in the Seychelles. Silhouette Island is the third-largest island in the Seychelles, located in the Indian Ocean. The... (read more)
2018-03-07 03:01:04

Survey Accuracy

Furthering Dialogue on ‘Towards Cadastre 2034’
Renewed debate on the nature and role of the cadastre was sparked in 2010 through the forums of FIG 2010 in Sydney, Australia, and GIM International. Six design elements for ‘future cadastres' were discussed, one of them being ‘survey accuracy'. The wide range of responses regarding this design element implied that the topic required further clarification. Here, we hope to provide such clarification and further the dialogue on ‘Towards Cadastre 2034'.   The six design elements proposed to the FIG 2010 forum were: ‘survey accuracy'; the move towards property objects; implementation of 3D and 4D aspects; ability for real-time updates;... (read more)
2011-11-09 02:53:00

Smart Cities and Linked Data

Technological Background
The European Union defines a ‘smart city’ as “a city well performing in 6 key fields of urban development, built on the ‘smart’ combination of endowments and activities of self-decisive, independent and aware citizens”. Amongst the key fields are smart mobility and a smart environment. Smart cities rely heavily on reliable, accurate and available data. Linked open data (LOD) is a way to make that data available and therefore to ‘enable’ the smart city. (By Huibert-Jan Lekkerkerk, contributing editor, GIM International, The Netherlands) Linked data (LD) refers to data that is made available in a structured way through the internet.... (read more)
2016-09-30 10:14:33
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