BIM: A New Model for Surveyors

Important Opportunities and Challenges for Surveyors
Building information modelling (BIM) is one of the most intriguing opportunities for surveyors to come along in years. This model-based approach combines technologies and processes to support the efficient creation and use of information for building construction and operations. Because of its strong ties to spatial information, BIM offers a familiar landscape and rich possibilities for surveyors and other geospatial professionals, according to Ron Bisio, vice president of Trimble Geospatial. The opportunities stem from the growing acceptance of BIM within the surveyor’s traditional client base of engineers, architects and property owners. By gaining an understanding of the key concepts of... (read more)
2017-02-28 12:59:59

Multi-level Implementation of SDIs

Emerging Trends and Key Strategic Issues
The debate on Spatial Data Infrastructures (SDI) has reached a level of maturity that encourages reflection and facilitates evaluation of past experience. The author considers some emerging trends in the field of SDI with reference to recent implementation, and reformulates four key strategic issues for future SDI development identified in GIM International several years ago. The largest change is the shift from the product model of the first-generation SDIs to a process-led model of second-generation SDI, essentially a shift in emphasis from the concerns of data producers to those of data users. Database creation was very much the key driver... (read more)
2006-02-23 12:00:00

Towards All-in-one Photogrammetry

A Case Study of Dense Image Matching Using Oblique Imagery
Modern photogrammetric camera architectures provide high-resolution imagery in nadir and oblique views. This case study sets out to prove the potential of oblique imagery to deliver dense point clouds to be used for DEM, 3D city model and true orthophoto generation – an important step towards ‘all-in-one’ photogrammetry. 3D point clouds for DEM or orthophoto production are typically collected using airborne Lidar systems. The recent development of dense image matching methods provides an efficient alternative by deriving point clouds from imagery. Within this fully automated image processing pipeline, corresponding pixels between multiple images are determined. Each pixel represents a sight... (read more)
2012-04-26 11:32:21

Land Administration Domain Model

Impact on Implementation of International Policies
An international group of land administration professionals initiated the development of a data model that facilitates the quick and efficient set-up of land registrations. Just as social issues benefit from proper land administration, land administration systems themselves benefit from proper data standards. The Land Administration (LA) standard has been available since 1 December 2012 as a formal International Standard, published as ISO 19152. This standard is expected to have an impact on the development of Land Administration Systems. The International Standard for the Land Administration Domain serves the following goals: Establishment of a shared ontology implied by the model: The... (read more)
2013-05-27 12:02:07

Geomares: Quality is Our Motto

GIM International Interviews Durk Haarsma
Geomares Publishing is the new media company behind GIM International, having in October taken over ownership from previous GIM publisher of almost ten years Reed Business-Geo. Geomares publishing director Durk Haarsma has in house strong brands, dynamic publishing concepts for the future and a dedicated team that will keep working to deliver quality in every possible way. Could you outline your reasons for buying GIM International and establishing Geomares Publishing? I have been in post as publisher of GIM International now for five years and have a strong belief in GIM International as flagship brand. Together with our other publication,... (read more)
2009-12-29 11:32:43

TIGER Tale

Uncertainty of US Core Geo-demographic Data
Core geo-demographic data in a GIS-compatible format derived from decennial US censuses has greatly benefited marketers, social scientists and governments. It has also inspired development of similar datasets in other countries. However, the US Census Bureau’s Topologically Integrated Geographic Encoding and Referencing (TIGER) data has many limitations, including missing or erroneous data, inaccurate or deliberately misleading responses, misinterpretation by casual users, and reinterpretation by various groups bent on teasing out information. There is also potential for criminal misuse of derived information. One of the biggest sources of uncertainty concerns undercounting of various groups, many but not all socially marginalised. So-called... (read more)
2007-01-02 09:23:23

Governing Marine Spaces

Stakeholders, Legal and Technical Issues
The governance of any geographical area, including marine space, is the management of stakeholder relationships with regard to spatial-temporal resource use for many sanctioned economic, social, political and environmental objectives. The authors explore a number of issues and identify a narrow approach to stakeholder participation as one of the greatest limitations to marine programmes and projects. Interests in marine space can be expressed in a variety of ways: sovereignty, jurisdiction, administration, ownership (title), lease, license, permit, quota, customary rights, aboriginal rights, collect-ive rights, community rights, littoral rights, public rights, rights of use, and public good. One feature of a coastal... (read more)
2006-11-20 12:00:00

Linking Geospatial Database with GIS

GIM International Interviews Dr Jayant Sharma, Technical Director Spatial Products, Oracle
The database vendor Oracle Corporation has for a long time shown a strong interest in geospatial data storage. For a fuller picture of the spatial aspects of their latest product, Oracle 10g, GIM International interviewed Dr Jayant Sharma, technical director of Oracle Spatial Products, in New Delhi, India. Biography of Dr Sharma Dr Jayant Sharma is technical director, spatial products at Oracle's New England Development Center and has over a decade experience in databases and spatial information systems. He was responsible for building the spatial product team when he joined Oracle Corporation in 1996. He also represents Oracle at Open... (read more)
2005-06-09 12:00:00

The Tough Road from 2D Maps to 3D City Models

GIM International Interviews Dr Filip Biljecki
The demand for mapping intensively used parts of the Earth, including roads and cities, is steadily growing. This is because today’s rate of urbanisation requires detailed and up-to-date geodata in its full three dimensions. Such datasets help city managers to prevent a decline in liveability, to limit water, air and noise pollution, and to improve fair taxation and rapid emergency response. Crucial is the abstraction of the 3D real world, a concept known as level of detail (LoD). Since 2012 Dr Filip Biljecki has been investigating how to improve the level of detail (LoD) in 3D city models. For his... (read more)
2017-07-06 09:45:13

Automated Map Generalisation

Meeting Today's Information Demands
Nowadays spatial information is much more often displayed on digital devices than on a paper map. Within digital environments, users have high expectations regarding up-to-date information and consistent data when zooming in and out. The recent progress in automated map generalisation offers the potential to meet those high expectations. ‘Generalisation’ of geoinformation is the extraction of less-detailed data from highly detailed data to fit a specific purpose. Less-detailed data is more suitable for displaying geoinformation at small scales and for obtaining overview-like visualisations of a particular area. Interactive generalisation is time- and labour-intensive: it can take years to generalise a... (read more)
2014-10-24 10:23:15
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