The Basic role of a Hydrographic Office’s (HO) is to provide essential hydrographic Services to support safe and efficient navigation and promote national maritime development for the nation. In recent years HOs all over the world are playing leading role in development of Electronic Navigational Charts for marine community so that vessels can navigate safely on their voyage across oceans.
The GPS is a ubiquitous tool on the planet today. Its ability to pinpoint a person’s position on the globe, and store information about that location has been one of the most significant contributions to society in the latter Twentieth Century. Currently, the systematic collection of geospatial attribute data is limited to very expensive GPS receivers and specially trained personnel. The general procedure for collecting geospatial attributes with the consumer-grade GPS has required the use of “add-ons”, such as hand-held computers, laptops and palm pilots. These add-ons are frequently outside of the financial and technical reach of many communities, organizations and under funded agencies. The protocols and procedures presented here are designed to modify and merge existing methods and technologies to overcome these financial and technical barriers.
Spatial data is the fuel for 3D Applications, but all too often the fuel supplied is inappropriate. The software applied and expertise required when modelling a flood event or predicting a cityscape’s lineof-site is exactly the same using highly precise data as it is for generalised data. The difference is in how well that analysis relates to the real world … i.e. whether the analysis is correct or not. Conversely, supplying highly accurate or dense data to a generalised analysis can cost both time and money which is not reflected in the final product. Hence the word of this paper is: appropriate. Apply the most appropriate data to your application. There is nothing wrong with “approximate” or “inexpensive” 3D data, as long as it is appropriate for the level of analysis being performed.
Indian Space Research Organisation (ISRO) has taken up a project called Indian Regional Navigation Satellite System (IRNSS) for the establishment of an independent regional navigational infrastructure. The system main objective is to provide high positional accuracy (comparable to the existing constellations) real time position, velocity and time for various users in the region. IRNSS services will be available on a 24x7x365 basis irrespective of the availability of other constellations over Indian airspace. The system leverages the technological competence of ISRO in satellite, ground and other critical technologies
Ordnance Survey vision helps shape a VISTA for underground assets
VISTA (Visualising integrated information on buried assets to reduce street works) is a collaboration of 21 organisations developing an integrated infrastructure to enable data sharing for all buried assets across Great Britain. Ordnance Survey’s intelligent large-scale data OS MasterMap Topography Layer is the reference base underpinning preliminary trials by researchers at Leeds and Nottingham Universities to integrate disparate records of buried pipes, cables, ducts and wires. VISTA will combine this information with in-situ survey observations using real-time centimetre-level services provided by OS Net, Ordnance Survey’s GPScorrection network, and by Leica Geosystems’ SmartNet, which is enabled by OS Net. OS Net is a network of more than 90 GPS base stations that improves the standard accuracy of raw GPS readings to augment any application that requires GPS positioning. www.ordnancesurvey.co.uk
LBS subscribers will total 315 million in five years
In 2011, the total population of GPSenabled LBS subscribers will reach 315 million, up from 12 million in 2006, according to a new study from ABI Research, USA. This represents a rise from less than 0.5% of total wireless subscribers today to more than 9% worldwide at the end of the study’s 5-year forecast period. The LBS market took off first in South Korea and Japan, driven by personal navigation and some family- and people-finder services. In the United States, Nextel and Sprint initially drove LBS adoption with a focus on fleet applications. www.abiresearch.com
After his extended sick leave Everest reached India …
Leica AT504 Geodetic Choke Ring Antenna now supports GNSS
With the introduction of the Leica AT504 GG, Leica Geosystems is announcing a brand new version of its successful AT504 choke ring antenna for permanent reference stations and networks. This new antenna tracks GNSS observations, supplying high quality GPS and GLONASS data when used in conjunction with Leica GPS1200 GNSS receivers. The design of the AT504GG choke ring antenna effectively suppresses multipath effects and has a very stable phase center making it ideally suited for geodetic applications using GNSS observations.
Leica Geosystems also introduces the new V2.2.0 for Leica GPS Spider software for GPS reference stations and networks. With this new update of GPS Spider, Leica Geosystems continues its policy of continued product development and improvement of its GPS Reference Station solutions. www.leica-geosystems.com
Dr Manmohan Singh, Prime Minister of India has recently expressed concern over the ‘decline …
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