Results of Global Mapping Project

The majority of the world’s population will soon live in urban rather than rural areas. Adding a spatial dimension to population estimates, a new study finds that as much as 3% of the Earth’s land area has already been urbanised, which is double previous estimates. Led by the Center for International Earth Science Information Network (CIESIN) at Columbia University’s Earth Institute, this study has resulted in the construction of a suite of products constituting the first detailed and systematic data sets on urban population distribution and the extents of human settlements across the globe. Although population census and satellite data... (read more)
2005-03-21 12:00:00

Compact Testing of EDM Instruments

Using Mirrors for Doubling and Tripling Laboratory Space
A new laboratory method for verifying the accuracy of distance measuring solves the problem of having to mount reflectors outside the laboratory. The limited space of the laboratory is duplicated and tripled by using mirrors. The method gives the same results as the standard method. Verification of EDM equipment involves the determination of instrument errors, then used to monitor instrument performance. Periodic calibration aims to minimise systematic error and determine the highest achievable precision. EDM instruments should be calibrated annually; frequency checks should be made semi-annually. There are two methods for calibrating EDM: the field method and the laboratory method.... (read more)
2005-03-21 12:00:00

Geospatial Goes Global

ASPRS Annual Conference
This year’s annual conference of the American Society for Photogrammetry and Remote Sensing (ASPRS) took place from 7th to 11th March, with the theme ‘Geospatial Goes Global: From Your Neighbourhood to the Whole Planet’. Aimed at a wide variety of professionals, the conference included more than four hundred technical and special session presentations and at least seventy poster sessions. Chip Groat, director of the US Geological Survey (USGS), gave the opening keynote address. He discussed the Earth Summit process that is creating agreements amongst space-faring nations of the world to more effectively integrate their Earth observation programmes and exchange the... (read more)
2005-03-21 12:00:00

Lidar-based Survey Solutions

Optech Incorporated
Optech Incorporated focuses on the development, manufacture and support of advanced, lidar-based survey solutions. Established in 1974 as a privately held, Canadian-owned research and development firm, Optech was originally an offshoot of research into light detection and ranging ('laser radar') conducted by its founder, Dr Allan Carswell, at York University in Toronto. In the 1980s Optech airborne lidar systems produced the world's first nautical charts based on airborne lidar data. In the early 1990s, ground-based Differential Absorption Lidar (DIAL) systems were installed at several Arctic sites to monitor stratospheric ozone. At the same time, the company developed the compact, versatile... (read more)
2005-03-21 12:00:00

Moving Mountains in Africa

Lesotho Electricity Corporation Implements SDI
There is general agreement that spatial data is key to sustainable resource management and overall economic development. A Spatial Data Infrastructure (SDI) in turn provides the underlying foundation for accessing and using spatial data in decision-making processes. The author shows how SDI is being utilised by the Lesotho Electricity Corporation so to assist in national sustainable development programmes. The government of Lesotho, through its Ministry of Tourism, Environment and Culture has recognised that the interaction of environmental components and human behaviour in the biosphere are multifaceted. The resulting complex interfaces called for an interdisciplinary approach to managing both the impact... (read more)
2005-03-21 12:00:00

Major Updates to Autodesk's Portfolio

Autodesk Inc. (CA, USA) has announced new versions of its software portfolio, including more than 25 products that help its customers create, manage and share digital assets most effectively, to compete and win. Autodesk's major new product releases include: Autodesk Inventor 10, a 3D design software. Inventor 10 introduces comprehensive functional design features that effectively prevent 'over-engineering' and save time and money on projects. Autodesk Civil 3D 2006, a 3D civil engineering design program that features a dynamic engineering model to complete projects faster and more accurately. Autodesk Map 3D 2006, which connects CAD and GIS data with geospatial tools.... (read more)
2005-03-21 12:00:00

Medical Application of Multi-camera Systems

Bedsore Analysis Using MEDPHOS Photogrammatic System
Medical applications such as bedsore analysis often require 3D surface reconstruction of the human body. Major surface reconstruction techniques are based on mechanical digitizers, laser scanners and vision systems, including photogrammetry. Multi-camera systems can greatly reduce ambiguity resulting from loss of information associated with the perspective mapping of a 3D scene onto a 2D image. The authors present three and four-camera photogrammetric systems for the analysis of bedsores. A bedsore occurs when sustained pressure of bedclothes against the skin causes local obstruction to the blood supply, resulting in damage and potential loss of the affected tissue. Bedsores affect approximately 20%... (read more)
2005-03-21 12:00:00

China Leaps Ahead with Geospatial Research

GIM International Interviews Professor Dr ZHANG Jixian
Prof. Dr John van Genderen, himself a leading western expert on geospatial developments in China, interviews Professor Dr ZHANG Jixian, acting president of the Chinese Academy of Surveying and Mapping on the rapid evolution of geospatial ideas in China. Could you provide a brief overview of China’s earth observation missions, from their start up until now? China initiated a plan to develop a self-owned, proprietary (in terms of intellectual property rights) earth observation system after DFH-1, the first Chinese satellite, in 1970. Since then, many earth observation missions have been launched. As of today, we have developed five series of... (read more)
2005-03-24 12:00:00

China Leaps Ahead with Geospatial Research

GIM International Interviews Professor Dr ZHANG Jixian
Prof. Dr John van Genderen, himself a leading western expert on geospatial developments in China, interviews Professor Dr ZHANG Jixian, acting president of the Chinese Academy of Surveying and Mapping on the rapid evolution of geospatial ideas in China. Could you provide a brief overview of China’s earth observation missions, from their start up until now? China initiated a plan to develop a self-owned, proprietary (in terms of intellectual property rights) earth observation system after DFH-1, the first Chinese satellite, in 1970. Since then, many earth observation missions have been launched. As of today, we have developed five series of... (read more)
2005-03-24 12:00:00

OGC Announces Risk and Crises Management Working Group

The Open Geospatial Consortium Inc. (OGC) (MA, USA) has established a Risk and Crisis Management Working Group (RCM WG) to address the global need for better sharing of geospatial information in risk management and emergency management. The purpose of the RCM WG is to establish requirements and best practices for Web service interfaces, models and schemas for enabling the discovery, access, sharing, analysis, visualisation and processing of information related to natural and human-caused risks and the management of related crises. The RCM WG will communicate the benefits of the OGC consensus process and specifications to the risk and crisis management... (read more)
2005-05-03 12:00:00
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