Surveying Indonesia’s Myriad Islands

With nearly 13,500 named islands, Indonesia is very much an archipelagic country. The challenge is surveying and mapping many of them. For Dr Catur Aries Rokmana, Gadjah Mada University the ideal platform is a UAV. In total, Indonesia has 13,466 named islands. For an archipelagic country it is very important to document them because many of the baseline points which define maritime boundaries are located in the outermost islands. This article gives some practical experience of utilising aerial photography, taken using Unmanned Aerial Vehicles (UAV), for photogrammetic surveying of the outermost small islands of Indonesia. Logistical Difficulties There are unfortunately... (read more)
2017-07-20 11:43:56

Women and Surveying

Increasingly women are entering the geospatial sector, with many (though not all) holding higher degrees. As the industry becomes more diverse with new opportunities, Ruth Badley talks to three women of their experiences, including two who are running survey companies, in what is otherwise a male-dominated profession. Sue Stewart is a director of Laser Surveys, which operates from offices in Worcester and Hornchurch, Essex. The company supplies Ordnance Survey mapping and a range of products online as well as providing topographical surveys, floor plans, elevations and sections, laser scanning, 3D modelling, underground services surveys, ground penetrating radar surveys, drainage connectivity... (read more)
2017-08-22 03:48:34

From Surveying to Incident Management

Working with the Environment Agency, Keith Nursey reports on how his career has moved from ‘pure’ surveying into various managerial roles and explains where he thinks his geomatics skills have helped. My interest in surveying began while studying for my Geography degree at Aberystwyth University and during my post-graduate studies at University College London (MSc Surveying) I determined my early career path. Eight years followed; working for a small survey company, a national architect and a consulting engineer. This saw me employed on projects from the top of Scottish mountains, to the depths of the London Underground, in Royal palaces... (read more)
2017-07-20 12:51:42

The Realities of Drone Surveying

Charlton Bland shares his experiences in operating drones and sets out guidelines for successful piloting of the platform and processing of the data collected. The introduction of drones into mainstream surveying is as significant as the previous introductions of Electronic Distance Measurement (EDM), GPS and terrestrial laser scanning. Drones permit aerial photogrammetry or lidar to take place on sites in which it would not be economical or practical to implement manned aircraft flights. They can enable accurate mapping with accuracy equivalent to terrestrial lidar. However, like any piece of surveying hardware, be it a total station or Global Navigation Satellite... (read more)
2017-11-02 10:55:12

The Challenges of Shallow Water Hydrographic Surveying

Surveying Britain’s 2000 miles of inland waterways is specialised work. Kate Rowlatt and John Williams show how a new compact custom system aboard a bespoke survey vessel is capturing cleaner data even under difficult conditions. Hydrographic surveying on inland waters can often be extremely challenging as there may be many risks to both personnel and equipment or perhaps factors which compromise the survey methodology resulting in poor data quality. Risks may come from ultra-shallow regions where the survey vessel and/or equipment may touch the riverbed; fast flowing currents in and around weirs, dams and intakes or, as seen more recently,... (read more)
2017-04-28 12:51:04

FIG Congress 2018 - Surveying Profession in Transition

James Kavanagh has given a report on the FIG Congress with particular reference to UK interests. Here we look at some of the wider issues from the technical sessions. Surveying is Transforming The congress provided an overview of the surveying sector as a whole, which is steadily transforming to meet future requirements. Although the precise circumstances vary from country to country, many of the presentations expressed the establishment of an open real-estate market as a common requirement in a globalised economy. Whereas the surveying market has been traditionally local and national by nature, and the professionals within the countries have... (read more)
2018-07-04 12:48:35

Surveying Above and Below the Water Line

Phil Mills presents a case study of Derwent Reservoir in Northeast England, looking at the accuracy of photogrammetry underwater and surrounding the reservoir and at the value of the imagery for assessing the condition of the embankment. Occasionally there is a requirement to survey a site which has standing water present. This situation could for example occur at an old quarry where there may be a number of such areas and they could differ substantially in depth. This investigation tested whether data captured using an SUA could measure reasonable depths of water and determine at what depth the level accuracy... (read more)
2017-09-05 01:17:08

YellowScan launches new LiDAR surveying solution

YellowScan is pleased to announce the global launch of its new LiDAR UAS surveying solution with its highest accuracy and most dense geo-referenced point cloud data: 3cm accuracy – 300 000 shots/s – 1.5 kg. R&D development for the YellowScan Surveyor solution started in early 2015 with the same philosophy and technology foundation that has made the YellowScan Mapper. With a robust and fully integrated system designed to meet the needs of most demanding survey professionals and terrain, YellowScan Surveyor is quickly and easily adapted to any drone, generating data when and where you need it. The team has carefully... (read more)
2017-01-13 03:37:30

DJI’s Metric Camera for Aerial Surveying

DJI has released the X4S camera, a lightweight version of the large aerial cameras carried in manned aircraft. How do aerial or metric cameras differ to a DSLR? An aerial mapping camera is primarily designed to have a low distortion metric lens and reliable construction to maintain its calibration. To achieve this the cameras have very few moving parts, particularly those that would affect the lens focal length. Aerial camera lenses are very high quality and virtually distortion free. This, and a constant lens focal length, means that every pixel is in the right place. 3D mapping from photogrammetry is based on... (read more)
2018-03-19 11:43:13

Photogrammetry Tool for UAV Land Surveying Missions

Before the introduction of small unmanned aerial vehicles (UAVs) for aerial photogrammetry, planes, helicopters and metric cameras were used. Aerial mapping projects were often not only costly, but also complex due to the images being taken from high altitudes. UAVs have provided more affordable and faster aerial mapping solutions. When it comes to planning survey missions for small UAVs, UgCS is suitable software for the job. It supports most UAV platforms and provides useful tools such as a photogrammetry tool and an image geotagging tool. The photogrammetry tool in UgCS (designed by SPH Engineering) allows creating and flying photogrammetry missions... (read more)
2017-03-08 11:54:19
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