GPS technology considers the essential tool for establishing geodetic networks.
Static method of GPS is used often in observing geodetic network points. Establishing
geodetic networks using GPS requires accuracy, consistency and economency.
This p
aper discusses influence of observation mode and number of GPS receivers in
accuracy of calculating of coordinates of points. Coordinates of network points are
clculated using tow and three GPS receivers and with diferent methods like radial, traverse,
network.
Comparison between coordinates for network points obtained by several cases is
performed. The differences between coordinates indicate accuracy of network method in
calculating coordinates when three or more receivers are avlible. When tow receivers are
avilable the radial method is the best in accuracy and consistency.
Research offers expanded version of the relationship to improve measurement
accuracy (provided by Otrenbski), which include correlated or free geodetic networks, with
correlated or incorrelated observations, which are processed according to the Lea
st Square
theory. In addition to enhancing the Global accuracy, Research gives additional formula
takes into consideration the enhancement of each observation (local precision). the validity
of the proposed formula was proved depending on the Idempotent matrix.
In addition to the general concept of the reliability of geodetic network (described in
literature), Research gives the formula of the relationship between improvement of
measurement accuracy and one of internal reliability features (provided by Pelzer), and
used in the evaluation of geodetic measurements. Research find and gives the basic
mathematical indicators of the interaction of processing model with the occurrence of
errors in geodetic measurements.
The stability of geometrical structure considered as the basic standard for it’s safety
regardless of it’s different parameters (Hydrology, morphology ,geology and geodesy).But
the geodetical study of the horizontal vertical (deforms) ultimately gi
ves the safety because
it uses the digital result about the construction safety.
This research aims at studying the horizontal and vertical deforms of the
ALDOYSAT werenear by ALDOYSAT village –Idleb- city-on the Syrian and Turkish
border.
For this reason in first step we surveyed the area installing topographic cally and
acontrolling network to be able to achieving a topographical schema.
In the next step: we did the periodical measurements throughout chronological
times. At the end of every period we dealt the measurements and the shifts via visual basic
program.
The search was ended with the best results and recommendations.
The research aims to complete the study of the theory and operation of networks
geodesic associated marine beach, whether horizontal or vertical, with display rods and
devices used in completion of topographic survey of networks in both land and ma
rine
parts.
In theoretical part it was addressed to specific shapes networks geodesic which
distinguish maritime works beach that takes the form of the morphological characteristics
of the natural land of each building proposed network, and the numerical characteristics of
each building proposed networks.
In the practical part the results of measurements and amendments was presented to
some forms of executed geodesic beach networks for several forms of works: (topographic
raise achievements within the existing and investor basin in order to establish a slider,
completion of the cadastral beach works in order to determine distortions in the existing
pier, clean the shipyard of silt and sediment.
Software has been reviewed to assist in completing marine works, utmost to obtain
the final marine charts.
The research concluded that specific proposals on vertical geodetic networks studies,
and identify the various parts of software related to marine works and ways to take
advantage of them.
