ts04a angelini sugameli 6209 ppt - fig · minimally constrained adjustment ... we felt an...
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Map N. 479 Municipality of Rome - year 1939
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Map N. 479 Municipality of Rome - year 1939 «Detail»
The idea for the project
"Return to Origins”
was conceived in the
frame of the activities
for training and
promotion of geo-mapping
matters
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as an exercise for the
continuous search for
solutions, and for the
understanding of the
history of topography.
The measuring process,
developed according to
the rules of the
satellite technology GNSS
is closely connected to
some of the most
important national
historical
Trigonometrical points,
such as the master
vertex of Italian
Geodetic Network
definition Roma 1940
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the geodetic benchmark ‘Rome Monte Mario’
and the trigonometric benchmark located onThe Mount Soratteas orientation for theMain Azimuth of the network
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In a day of sessions
have been detected n.
13 vertices
trigonometric IGM95
ETRF2000 belonging to
the national
trigonometric network
and five are cadastral
origin of great extent.
The project concludes
with a survey of
trigonometric
(cadastral) points for
tests and inspections
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During the calculation of
the measurements, the
survey was framed in the
reference system
RDN ETRF2000
(Rete Dinamica Nazionale)
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Minimally Constrained AdjustmentSoftware LEICA LGO 8.1 Grontmji Move3
StationsN.partly known st. 1(M0SE)N.Unknow st. 29Observation1281( 427 baselines)Degrees of freedom1194
Absolute Error Ellipses (2D ‐ 39.4% 1D ‐ 68.3%)
Redundacy
W-Test
T-Test 3d
Loops n. 31, Lenght 13 to 250 kmMisclosures 0.0 to 0.2 ppm
Differencies VS RDN Coordinates
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Weighted Constrained AdjustmentSoftware LEICA LGO 8.1 Grontmji Move3
StationsN.partly known st. 8(M0SE)(UNPG)(UNOV)(RENO)(AQUI)(LAT1)(ALRA)(VAGA)N.Unknow st. 22Observation1281( 427 baselines)Degrees of freedom1215
Absolute Error Ellipses (2D ‐ 39.4% 1D ‐ 68.3%)
Loops n. 31, Lenght from 13 to 250 kmMisclosures from 0.0 to 0.3 ppm
Redundacy
W-Test
T-Test 3d
Project GNSS Network adapted over theItalian Geodetic Network geodesy Roma 1940
Software LEICA LGO 8.1 Grontmji Move3
Transformation over a set of common points to derive coordinatesgeodesy Roma 1940 (International Ellipsoid) from WGS84 ETRF 2000
RDN Etrf2000
10 matching points (First and second order RM40 benchmark)
Transformation residuals
Data provided by IGMI
Roma 1940 geodesy
Graphical overview
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Software LEICA LGO 8.1 Grontmji Move3
Transformation Check over a set of third and fourth order IGM trigonometrical point
Courtesy geom. Mauro URBANI Courtesy geom. Mauro URBANI
IGM 145035
IGM 145035
IGM 144045
ConclusionsWe felt an obligation, as Professional Surveyors, atwork in our territory, to follow the path opened by our predecessors, to whom we think with ourutmost respect and profound esteem.
We will continue in this direction, believing that thisproject could be a line of faith for furtherdevelopment of the profession of surveyor, in allareas of work , tied to the past, within an historical cartographic evolution or even , in a modern way, related to engineering works.
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Acknowledgments
We would like to thank all colleagues of the TopographyCommission of the Surveyor Board in Rome, who haveparticipated in this project.
A special thanks goes to all GNSS network operators whoare permanent suppliers of an extremely valuable free service.
THANK YOU FORYOUR ATTENTION
Adriano ANGELINI Ciro SUGAMELI Commissione Topografia Collegio Geometri e Geometri Laureati di RomaE-mail : [email protected] [email protected]. +39066625896 +393487822679Fax +3906233225141
ROMA, 8 maggio 2012 – ( TS04A )
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