Understanding Spatial Resolution

A User’s Perspective on Optical Earth Observation Sensors
Earth observation (EO) from space is important for resource monitoring and management. The performance of optical EO sensors is determined by four resolutions: spatial, spectral, radiometric and temporal. In this article, focusing on spatial resolution and manufacturers’ specifications, the author issues a wake-up call to users – encouraging them to better understand the abilities of EO sensors for object recognition – and provides a means to compare their performance. Civilian systems have had sub-metre spatial resolution since Landsat-1 was launched in 1972. With 80m, it was almost a spatial resolution revolution! The description in the literature of spatial resolution differs.... (read more)
2020-10-29 09:18:56

Videographics Launches Mapping Drone with Integrated KlauPPK

With the new release of the Condor V8-PPK mapping drone, Munich-based Videographics Ingenieurgesellschaft has completed its toolbox for most precise photogrammetric aerial mapping and surveying projects. The German company Videographics is dedicated to supply superior UAV mapping technology and services. “We successfully generated an impressive knowledge base in the field of most precise GNSS-PPK direct georeferencing and have a solid understanding of all aspects, required for highly accurate results and efficient workflows.” says Stefan Warislohner, CEO of Videographics. “Besides KlauPPK modules and software, we have been able to provide our customers with workshops and trainings and all hardware and software... (read more)
2020-10-15 10:39:55

South Korean Smart Cities Combine 3D Digital Models with GIS and BIM

Around the world, local governments are rolling out Smart City/Digital Twin projects to support economic stimulation and tourism programmes and to improve the quality of life overall. Up-to-date 3D building models and comprehensive Geographic Information Systems (GIS) data, along with Building Information Modelling (BIM) data, are combined to create a digital twin of the inside and outside of buildings and the surrounding topography. In effect, the real world is converted into an exact digital replica to facilitate analysis, planning and management of all smart city assets. The primary goal behind 3D virtual cities is to reduce and manage problems typically... (read more)
2020-09-28 11:00:44

Kinematic Laser Scanning in Assessing Urban Land Use and Utility Infrastructure

Fast Site Visits and Accurate 3D Mapping
Urbanization and the development of megacities poses critical challenges for sustainable but efficient land use globally. Power lines, pipelines for water, district heating, gas and oil, and other technological systems are critical yet often hidden assets facilitating today’s lifestyles. Meanwhile, there is an ever-important need to preserve natural environments and recreational spaces in the world’s cities, despite the pressure to spread more concrete and asphalt to accommodate the people and businesses flocking to them. This article examines how kinematic laser scanning can support urban planning and infrastructure management. There is an ever-increasing need to use the limited urban land area... (read more)
2020-09-28 08:39:46

PolyExplore Unveils High-Precision UAV Lidar Mapping System

PolyExplore has launched the Polyscanner LS1, a high-precision Lidar mapping system designed for UAVs and other aerial platforms. Based around advanced solid-state Lidar technology, the Polyscanner LS1 uses an innovative scanning pattern and focused field of view (FOV) to create a dense point cloud with a detection range of over 200 metres. This latest addition to the Polyscanner family of aerial mapping platforms incorporates PolyExplore’s Polynav 2000 precision GNSS-aided INS (inertial navigation system) technology, featuring a dual-frequency, dual-antenna, quad-constellation PPK/RTK capable receiver with centimeter-level accuracy and a tactical grade IMU. Sensor fusion post-processing software is also included as part of... (read more)
2020-09-24 10:03:35

Trimble Adds New Innovation to Flagship GNSS Solution

Trimble has introduced the Trimble R12i GNSS receiver, the latest addition to its Global Navigation Satellite System (GNSS) portfolio. The Trimble R12i incorporates Inertial Measurement Unit (IMU)-based tilt compensation using Trimble TIP technology, which enables points to be measured or staked out while the survey rod is tilted. This empowers land surveyors to focus on the job at hand and complete work faster and more accurately.  The IMU-based tilt compensation capability of the Trimble R12i builds on Trimble’s highly regarded ProPoint GNSS positioning engine which, according to the company, delivers more than 30% better performance in challenging environments compared to... (read more)
2020-09-02 10:13:02

Multibeam Lidar for Mobile Mapping Systems

Features and Productivity
In mobile mapping, geospatial data is acquired by one or more cameras and/or one or more Lidar sensors mounted on a vehicle that moves over land, through water or through the air. The distribution of Lidar beams over the scene may be realized by a spinning mirror or by a solid-state device. Multiple beams may be emitted simultaneously, and single or multiple returns may be captured. This article discusses the features and productivity of various multibeam Lidar sensors suited for mobile mapping. In the case of the selected Lidar sensors, the mechanisms for distributing emitted beams over the scene are... (read more)
2020-08-12 11:16:06

SimActive’s Correlator 3D Enriched with Cloud Sharing and Reflectance Calibration

SimActive, the Canada-based leading developer of photogrammetry software, has announced the release of Correlator3D version 8.5. The new version allows users to share and visualize projects in the cloud. It also features new tools for the calibration and processing of multispectral imagery. Specifically, results can be exported to the cloud directly from the software interface, and shareable links are automatically created for online visualization. Moreover, calibrated reflectance panels and sun sensors can be used to produce reflectance maps, with multispectral bands perfectly registered. “Our software attracts a variety of clients, with a wide range of needs”, said Louis Simard, CTO... (read more)
2020-06-10 09:43:59

A Commercial Drone Mapping Solution Using the Phantom 4 PPK

Previously, people had to invest more than 30,000 dollars to purchase professional mapping drones and place a large number of control points on the ground to get accurate, survey-grade maps. This situation continued until DJI released the Phantom 4 series of commercial drones with integrated GNSS antenna and high-definition gimbal cameras. This paper proposes a commercial drone mapping solution using the Phantom PPK to significantly reduce control points, and explains the workflow, testing methods and how the results support this level of drone mapping accuracy. (This article is brought to you by Hi-Target and was written by Richard Pan and... (read more)
2020-06-04 12:26:27

Adding a New Level of Reality Capture to 3D Point Clouds

Global technology company Emesent has announced the release of the colourization functionality for its Hovermap Lidar scanner. The 3D point clouds from Hovermap can now be augmented with true colour, providing additional context for visualization and analysis. "We’re excited to announce this significant new feature for Emesent," said Emesent's CEO and co-founder Stefan Hrabar. "Colourization provides greater insights for our customers across many industries. This builds on the incredible 3D data that Hovermap produces to create rich, accurate digital twins and surveys.” The new colourization feature for Hovermap utilizes the latest rugged action camera – the GoPro Hero8. This modular approach... (read more)
2020-06-03 11:11:57
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