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| Client specific surveys Traditionally datasets captured are based on discreet points. Discreet point datasets must be fully specified by the be client and thoroughly understood by the field surveyor. Any missed or faulty data or a change in specification from the client requires a revisit by the surveyor. During the life time of a project areas will be resurveyed many times to suit the particular needs of different specialists. |
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| Central disseminator
of spatial information Scan data is multidiscipline – the information rich data set can be manipulated to meet the needs of many specialists. New information can be extracted from the data set at any time during the entire life of a project. If managed properly it becomes a central disseminator of information. |
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| High-Definition Surveying
Systems The added value to deliverable products has encouraged investment into a new generation of 3D Scanners. |
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Leica HDS 3000
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Leica HDS 4500
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| ABA developing Kinematic
3D Scanning The system known as the GRP5000 combines the HDS4500 and Leica GRP 100 rail trolley.The scanner is mounted on the trolley and fixed perpendicular to the track. The beam rotates at 33 scans per second and records10,000 points per revolution. Integrated sensors for chainage, gauge, cant and time measurement:
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| Graphical interface allows
full measurement control Density of measurement - The speed at which the trolley is pushed along the track determines the density of the scan. 1km/hr represents a progression along the track of 8mm ensuring all detail is picked up. - Chainage-specific profiles can be scanned by remaining stationary for just a few seconds. The user specifies the reference stationing The actual cross section measurement is shown in real time. This can be compared to a clearance profile. A radio modem within the trolley allows operator to control tracking devices from the keyboard. |
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| Coordinating scan data Data is acquired as either:
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| Processing Massive amounts of storage capacity are required. At 1.5 MB of data recorded in one second approximately 500 MB of raw data per 100m is stored. Software allows the scan to be viewed with a deroled projection at almost photo resolution and profiles can be extracted at any chainage. |
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| Cross Section at Ch 590.000 3d measured data can be easily viewed in psuedo-photographic form. |
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| Cross Section at Ch 625.000 Every detail appearing in the scan is measured to millimetre accuracy. |
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| 3D View of St. James’s
Park station Ch 628 – Ch 640 Continuous kinematic scanning builds into a dimensionally accurate virtual world. |
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| Clash detection A clearance map can be overlayed on the projection to highlight clashes. |
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| Data extraction Spatial information from any point with in the scan area can be directly extracted from the data base. Extracted data can be presented as a full 3D wire frame or 2D profiles in any format required by the client. (AutoCAD, MOSS, ClearRoute, ASCII). Minimum or Maximum Profiles over a given chainage. The greyscale images and clash detection reports can be directly annotated and delivered in a number of packages. |
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Why Kinematic Scanning?
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| View the evolution to 3D Scanning >> | ||||||||||||||||||||