High-Resolution Aerials of Canada

MapMart has added ATLIS Geomatics 10cm-30cm aerial imagery. A growing number of Canadian cities from the ATLIS Geomatics data set are available online at MapMart as well as from the free MapMart On-Demand Toolbar. Until recently, geospatial data users had few options in purchasing aerial imagery of Canada, but ATLIS has emerged as a premier provider of high-resolution Canadian data. Through ATLIS Mapmart is able to offer these data for the Canadian urban and rural areas in Manitoba, Saskatchewan and Alberta.Canadian cities that will be coming online during Q2 are: Calgary, AB; Morden, MB; Winkler, MB and municipalities throughout Southern... (read more)
2010-03-26 09:36:03

Cartography and GI

Cartography, in connection with geoinformatics, is responding to one of today’s most important questions: how can we help solve disaster-reduction requests in general, and early-warning (EW) and crises management (CM) in particular? Cartography has changed much in response to new opportunities offered by Information and Communication Technology (ICT). Intelligent access to databases and interactive user support can be applied not only in locating suitable maps on the internet, but also for map creation and modification according to individual requirements. Instead of just using maps previously created by someone else, these new technologies allow interactive use of cartography on the basis... (read more)
2008-03-06 12:00:00

Integrating UAV-based Lidar and Photogrammetry

Dense 3D Point Cloud Generation with Ultra-high Precision
Recent unmanned aerial vehicle (UAV or ‘drone’) platforms jointly collect imagery and Lidar data. Their combined evaluation potentially generates 3D point clouds at accuracies and resolutions of some millimetres, so far limited to terrestrial data capture. This article outlines a project that integrates photogrammetric bundle block adjustment with direct georeferencing of Lidar point clouds to improve the respective accuracy by an order of magnitude. Further benefits of combined processing result from adding Lidar range measurement to multi-view-stereo (MVS) image matching during the generation of high-precision dense 3D point clouds. The project was aimed at the area-covering monitoring of potential subsidence... (read more)
2020-05-19 02:33:35

Real-time Airborne Search and Rescue Detection and Geotagging

Software and hardware engineering efforts at ITRES, Canada, have moved into the next phase towards integrating their In-Flight Processing System (IPS) development with a new high-resolution pushframe thermal TABI-1800 imager. The thermal TABI has demonstrated its use and high thermal and spatial resolution capabilities during last summer's rapid response application in wildfire mapping. Fast access to accurate and precision georeferenced maps were mandatory for that. The TABI has now been integrated with a modified version of the IPS. This version will permit real-time thermal anomaly detection and marking. It bridges the gap from emergency response to thermal search and rescue.... (read more)
2012-02-29 09:10:34

Online Lidar Map of Britain

Aerial survey company Bluesky, UK, has launched a comprehensive online Lidar map of the UK. It covers approximately 75% of England and Wales, including all major towns and floodplains, plus areas of Scotland. The Lidar coverage ranges in vertical accuracy from 5cm to 15cm, and in spatial resolution from 25cm to 2m. The online map can be searched using a place name, postcode or geographical coordinates before purchasing data of the chosen area and downloading digital files.     By combining data from many sources, including Bluesky's archive, the company has created accessible and comprehensive online coverage of Lidar data,... (read more)
2012-01-27 11:15:52

Record Flying Season

Aerial mapping specialist Bluesky has reported its most successful year yet following a record-breaking aerial photography season. Bluesky's aerial surveying contributed toward a total area of 32,000km2 that was captured for GeoPerspectives covering Britain's cities and countryside stretching from Glasgow to the Scilly Isles.  Bluesky employed the latest imaging technology that enables the creation of 3D computer-generated fly-through maps and infrared maps that reveal the type of vegetation on the ground. The imagery is now available on Bluesky's website. During the 2009 Bluesky's aircraft were able to capture cities including Manchester, Glasgow and Leeds as well as counties such as... (read more)
2010-02-18 12:56:40

GCPs for Satellite Image Georeferencing Surveyed Worldwide with GNSS PPP

GNSS positioning by precise point positioning (PPP) has developed over the last few years and is frequently used by the scientific community. Its real-time or post-processing applications are already used in several fields (e.g. in farming for tractor guidance or in aerial survey for calculating flight paths), but despite this its use remains relatively low with surveyors, mainly due to the initialisation time. This method, however, can prove to be effective, particularly in regions where there are no or few permanent GNSS stations (CORS) to establish a geodetic survey traverse and fix ground control points (GCPs) for aerial or satellite... (read more)
2016-11-14 09:12:11

Underground Mobile Mapping Platform from Japan

Common mobile mapping systems heavily rely on positioning using GNSS. However, concrete, soil and other materials block GNSS signals, thus impeding their use when inspecting pipelines, subways or other underground corridors. Furthermore, such corridors are often narrow, which requires the system to be compact. In Japan a platform equipped with laser scanners and a camera which has been developed for mapping a wide variety of narrow underground spaces. (By Katsuhisa Banjo, ASCO, Japan)   Regular inspection of underground corridors is important to detect deformations and damage. The success of above-ground mobile mapping systems (MMSs) triggered us to design an MMS... (read more)
2014-06-10 11:25:12

Continuous Mobile Laser Scanning

Mobile Platform Terrestrial Lidar, IMU and GPS
Combining Terrestrial Laser Scanning, Position and Orientation Systems and GPS receivers into a mobile mapping system enables effective mapping of large and complex terrain. The authors tested a mobile mapping system at two sites: in an open pit mine, and along a road.<P> Optech and Sineco have been developing a mobile mapping system, initially based on a platform combining the ILRIS-3D (Intelligent Laser Ranging and Imaging System), the Applanix POS LV (land-based vehicle) and GPS receivers. This new system, ILRIS-MC (Motion Compensation), can be installed on any mobile platform and performs fast surveys, generating point-clouds in real time in WGS84... (read more)
2007-12-08 12:00:00

UAVs as Tools for Urban Planning in Uruguay

Photogrammetric Surveys of Irregular Settlements
Irregular settlements, also known as villas or favelas, present a big challenge in urban planning. When collecting data, whether to determine the existing situation or to plan future projects, topography plays a fundamental role. Not only is a large amount of information required but is also often difficult to access the locations, which makes capturing information much more complex than in the case of classical topography. Photogrammetry is the ideal methodology in such areas, and the unmanned aerial vehicle (UAV) is a perfect tool for this type of aerial survey. Read on for details of this project in Uruguay. (By Patricio Birriel... (read more)
2016-04-26 11:53:46
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