LiDAR and Laser Scanning

LiDAR and Laser Scanning - Developments in Photogrammetry...

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Developments in Photogrammetry and Temporal GIS By Jacob Hayes We live in an age where technology is constantly advancing and leaping ahead. In photogrammetry, we can attribute this to an explosion in information technology and is closely correlated with recent developments in the departments of science and engineering. When we look back over the last few decades in photogrammetry, we can distinguish great developments in several areas. The new developments within the field of photogrammetry are making it a more viable and accurate method of surveying work. These advances also allow surveyors to take preventative measures to problems before they might happen. And make better decision about problems that are currently being dealt with. These developments, in particular electronics and computer technology, undoubtedly have opened up new advances in photogrammetry in the areas of equipment, reliability, and applicability. This means the next step with these new technologies is finding a way to better integrate the information gleaned from them and use the end products of the new methodologies to create a time-integrative geographic information system. One of the major developments in photogrammetry is concerning the technological advances within digital photogrammetry. The new digital technology allows better and cleaner photos to be taken which can increase the accuracy of the work that can be done with them. Some of the first things to come from digital photogrammetry such as digital orthophotos, monoscopic map revision techniques, auto-digital elevation modeling (DEM), and automatic aerial triangulation (AAT) have 1
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been working well for years. With new applications and ideas being designed and implemented all the time. Using the new data we can integrate it with data already complied so that we can attempt to find common links between different surveys and the reasoning in how the spatial data changed. The other huge development within photogrammetry is the recent surge in 3D laser scanning. The new machines within this field allow for jobs that once took days or weeks of work with total stations to be done in hours. With varying laser scanning equipment, nearly anything from thermal scanning to 360 degree and overhead scanning can be done. It’s been extremely useful in fields such as drainage modeling, high precision topographical mapping, mine surveying, and archaeological survey work. It’s said that these new technologies only real limit is the creativity of the user and clientele. With such a speedy way to collect spatial data with high accuracy we can begin to catalog even better information than what we have and continue to use it with other laser scans in the future to more accurately be able to predict how time will affect things. GIS itself is computer system designed to allow users to capture, manage, store,
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This note was uploaded on 04/20/2008 for the course CE 465 taught by Professor Roy during the Spring '08 term at SIU Carbondale.

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LiDAR and Laser Scanning - Developments in Photogrammetry...

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