Zobrazeno 1 - 10
of 106
pro vyhledávání: '"North American Datum of 1927"'
Autor:
Renée Tardif, Geoff Banham, Caroline Erickson, Ron Berg, Yves Thériault, M. Craymer, Brian Donahue, M. Véronneau, Joey Chessie
Publikováno v:
Geomatica. 73:74-80
In 2022, the U.S., as part of its reference system modernization, will replace its North American Datum of 1983 (NAD83) with a new North American Terrestrial Reference Frame (NATRF2022), creating 1.3 to 1.5 m horizontal coordinate differences at the
Autor:
BondJason
Publikováno v:
GEOMATICA. 71:75-87
Since the late 1970s, the foundation for all survey work in Nova Scotia has been the Nova Scotia Coordinate Control System (NSCCS), which is based upon the Average Terrestrial System of 1977 (ATS77). In the early 2000s, some provincial mapping layers
Autor:
HuangJianliang, VéronneauMarc
Publikováno v:
GEOMATICA. 70:9-19
The Canadian Geodetic Vertical Datum of 2013 (CGVD2013) is the first major update to the vertical datum in Canada in almost 100 years. Canada is not only moving to a new vertical datum, but it is also using a modernized approach to realize it. The mo
Publikováno v:
Marine Technology Society Journal. 49:151-158
The National Spatial Reference System (NSRS) is the official coordinate system for all geospatial activities performed by civilian federal agencies of the United States, including National Oceanic and Atmospheric Administration's navigational charts.
Publikováno v:
Survey Review. 47:418-428
The main objective of enhancing national geodetic control is to create a homogenous horizontal survey control for the country. The realisation of a new geocentric datum, namely the Oman National Geodetic Datum (ONGD14), provides the GPS user communit
Publikováno v:
Geophysical Journal International. 194:772-786
The spirit-levelling–based British vertical datum (Ordnance Datum Newlyn) implies a south–north apparent slope in mean sea level of up to 53 mm deg –1 latitude, due to the datum falling on heading northwards. Although this apparent slope has be
Publikováno v:
Journal of Surveying Engineering. 139:1-10
Real-time precise point positioning (PPP) is possible through the availability of the real-time satellite orbit and clock corrections to broadcast ephemeris, the real-time broadcast corrections (BCs). The real-time BCs are currently available in glob
Autor:
Richard A. Snay
Publikováno v:
Journal of Surveying Engineering. 138:161-171
In 1986, Canada, Greenland, and the United States adopted the North American Datum of 1983 (NAD 83) to replace the North American Datum of 1927 as their official spatial reference system for geometric positioning. The rigor of the original NAD 83 rea
Autor:
Salim Heddam
Publikováno v:
Modeling Earth Systems and Environment. 2
In the present study, we developed and compared two artificial intelligences technique (AI) for simultaneous modelling and forecasting hourly dissolved oxygen (DO) in river ecosystem. The two techniques are: radial basis function neural network (RBFN
Publikováno v:
Journal of Surveying Engineering. 142
This investigation introduces a rigorous mathematical transformation of variance–covariance matrices between a global geocentric frame and a plate-fixed geodetic frame. A practical example between the geocentric frame of International GNSS Service