Focus Stories

Every month we will focus on a specific theme, featuring a selection of articles which have previously been published in GIM International magazine. By including a mix of older and more recent articles, we will present a complete recap of the subject. Furthermore, we will be bringing you a bi-weekly round-up of ‘Focus Stories’ related to the theme through our newsletter (sign up here). The theme for January 2016 is:

Photogrammetry and Point Clouds

What is a Point Cloud?

A point cloud is basically a large collection of points that are placed on a three-dimensional coordinate system.  Point cloud files greatly speed the design process by providing real-world context where you can re-create the referenced objects or insert additional models.  Point clouds are derived from raw data gathered by using a 3D scanner to obtain points from such things as buildings, topographies, or manufactured items. 

Point Clouds of a building

News: Photogrammetry

Obituary: Fritz Ackermann

Obituary: Fritz Ackermann

Sadly, Prof Dr Fritz Ackermann passed away at the age of 92 on 4 December 2021. He was a professor of photogrammetry and surveying at the University of Stuttgart in Germany from 19...

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Parrot Unveils 4G-connected Robotic UAV

Parrot Unveils 4G-connected Robotic UAV

Parrot has unveiled ANAFI Ai: a drone that sets new standards and capabilities for professionals. With a somewhat different appearance from most drones, it has insectile features....

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Articles: Photogrammetry

3D Modelling for Construction

3D Modelling for Construction

When it comes to 3D modelling for construction, what are the advantages and disadvantages of photogrammetry versus Lidar in terms of accuracy, complexity and cost? Breaking away fr...

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Mapping a University Campus in Brazil

Mapping a University Campus in Brazil

A pilot project conducted at a university campus in Curitiba, Brazil, aimed to create outdoor maps using UAS photogrammetry as well as indoor floor plans. At universities, facility...

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Aerial photo

What is Photogrammetry?

Photogrammetry is the science of making measurements from photographs.The output of photogrammetry is typically a map, drawing, measurement, or a 3D model of some real-world object or scene.
Many of the maps we use today are created with photogrammetry and photographs taken from aircraft.

Photogrammetry and Point Clouds

Benefits of Sweeping Airborne Cameras

Benefits of Sweeping Airborne Cameras

The A3 Edge digital mapping system is a sweeping camera system able to produce high-resolution and accurate imagery from high flight altitudes and hence to conduct surveys quickly...

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Bringing Colour to Point Clouds

Bringing Colour to Point Clouds

Until now, most commercially available airborne Lidar systems have operated on one single wavelength, reflecting energy from a pulse which is then used for classification or visual...

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Dense Image Matching

Dense Image Matching

3D reconstruction using dense image matching is a hot topic as it enables the automatic extraction of 3D urban models, notably from airborne oblique imagery. However, applying DIM...

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Photogrammetry and Point Clouds

3D Modelling of Fez

3D Modelling of Fez

The ancient imperial city of Fez, Morocco, is an important tourist attraction and has been listed as a UNESCO World Heritage Site since 1981. The layout of the city is complex, whi...

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Poles from Point Clouds

Poles from Point Clouds

Currently, the extraction of objects from point clouds of urban sites is commonly done manually as automation is impeded by noise, clutter, occlusions and varying point density. Th...

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Towards Optimal 3D Point Clouds

Towards Optimal 3D Point Clouds

Motivated by the increasing need of rapid characterisation of environments in 3D, the authors have designed a robot system that automates the work of an operator of terrestrial las...

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