Titolo presentazione
sottotitolo
Milano, XX mese 20XX
Sezione Geodesia e Geomatica – DICA
Geodesy and Geomatics - DICA
Update: July 2107
Geodesy and Geomatics Section - DICA
Geodesy and Geomatics - People
Riccardo Barzaghi Full Professor
Barbara Betti Full Professor
Maria Antonia Brovelli Full Professor
Fernando Sansò Emeritus
Alberta Albertella Associate Professor
Federica Migliaccio Associate Professor
Livio Pinto Associate Professor Chair of GG Section
Giovanna Venuti Associate Professor
Ludovico Biagi Associate Professor
Daniela Carrion Researcher
Mirko Reguzzoni Reseacher
Carlo De Gaetani Researcher
Vincenza Tornatore Senior Technician
Giovanna Sona Researcher
Geodesy and Geomatics Section - DICA
Geodesy and Geomatics – Research Areas
Physical and Mathematical Geodesy • Boundary Value Problems analysis • Earth gravity field estimate: local gravity models • Earth gravity field estimate: satellite gradiometry and global gravity models • International Service for the Geoid (ISG) activities
Surveying methods based on GNSS techniques • Methodological research activities • Permanent networks of GNSS stations • Non-permanent networks for deformation monitoring
Photogrammetry and Remote Sensing (Earth Observation) • Digital photogrammetry: close range applications • Unmanned Aerial Vehicles (UAV) applications
Digital cartography and Geographical Information Systems • GIS design • 3D and 4D applications • WebGIS and geo-Web Services
Geodesy and Geomatics Section - DICA
Satellite geodesy - Gravity models
The original concept of GOCE data analysis by means of the space-wise approach developed at the GG Section has been recognized by ESA as an official GOCE data reduction scheme for the production of GOCE Earth gravity field models.
The ESA GOCE mission (2009 – 2013) measured second derivatives of the gravity potential by means of a gradiometer. GOCE data have attained unprecedented spatial coverage and resolution of the Earth gravity field.
Satellite geodesy: the GOCE mission data analysis
Geodesy and Geomatics Section - DICA
Satellite geodesy The ASI MOCASS study
DICA - Geodesy and Geomatics proposal, with partners UniTS and AtomSensors
An innovative satellite gravity mission based on advanced Cold Atom Interferometry (CAI).
→ Goal: monitoring with high resolution mass distribution and variations which occur on and below the Earth surface. → A key issue in e.g. study variations in the water cycle; study of the Earth’s interior processes.
ASI Call (October 2015) for new concepts of mission and payload for Earth Observation
Complete laser + vacuum system
developed in Firenze (Space Optical
Clocks Project, 2008)
Laser source with integrated micro-
optics for micro-gravity experiments
with Rb (DLR-ESA, FBH Berlin)
Geodesy and Geomatics Section - DICA
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An image of the high precision Italian geoid (4 cm precision)
The Italian geoid estimate
Physical geodesy - Gravity models
Geodesy and Geomatics Section - DICA
GEMMA GLOBAL MOHO
Use of gravity observations (also from satellite missions, like GOCE) or GNSS campaigns to infer the Earth mass density and the structure of the subsurface. Development of inversion algorithms based on stochastic modelling and in particular on the Bayesian approach and MCMC methods. The activities are performed in cooperation with geophysicists from other universities and research centers, with applications also for oil exploration (ENI projects).
SALT DOME
SALT
SEDIMENTS
Physical geodesy - Inversion of geodetic data
Geodesy and Geomatics Section - DICA
International Service for the Geoid (ISG)
A Service of the International Association of Geodesy – IAG) Formerly IGeS, founded 1992 http://www.isgeoid.polimi.it/
PURPOSES AND ACTIVITIES
• to collect regional geoids on a worldwide scale (geoid repository); • to conduct researches on procedures for geoid determination; • to organize international geoid schools and special trainings; • to edit and distribute the Newton's Bulletin; • to take part in international researches: GEOMED; European Gravity Geoid project; Global Geodetic Observing System (GGOS) project for the height datum …
Spatial coverage of the grid geoid models available at ISG. Colourbar shows the highest spatial resolution per location (log10 scale, unit: arc-minutes)
Geodesy and Geomatics Section - DICA
GEOID REPOSITORY
On-line repository of regional geoid models, constantly updated. Basic information and references are provided (see the figure as an example) for all regional models in the geoid repository, that recently exceeded the number of 150 models. Public and on-demand regional geoid models are distributed with a unique ISG ASCII format.
International Service for the Geoid (ISG)
Geodesy and Geomatics Section - DICA
International Service for the Geoid (ISG)
Geodesy and Geomatics Section - DICA
International Schools on Geoid Computation
1st Int. Geoid School, Milano, 10 - 14 / 10 / 1994 12th Int. Geoid School, Ulaanbaatar, Mongolia 2016
International Service for the Geoid (ISG)
Geodesy and Geomatics Section - DICA
Laboratory of Geodetic and Photogrammetric Measurements
ACTIVITIES: • surveys for scientific and teaching
purposes; • structure, land and geodynamic
monitoring • research cooperation with Universities,
Public Authorities and Administrations, providing consultancy and services in the geodetic-surveying-photogrammetric framework.
MEASUREMENT INSTRUMENTS: • classical surveying instruments: Total
stations, theodolites and levels; • geodetic and low cost GNSS receivers; • RGB, RGB-D and NIR cameras; • drones for photogrammetric surveys.
Geodesy and Geomatics Section - DICA
GNSS permanent networks
and the national reference frame
RDN is the national Reference Frame, adjusted in ETRF in 2008 In the map: the ETRF displacements for a dense network of 650 stations (red) during the last 10 years. + coseismic displacements of 2016 earthquakes (black) Research activity Spatial modeling of the displacement field to analyze the deformation of RDN in 10 years.
Geodesy and Geomatics Section - DICA
• The GG Section is in the scientific advisory board of SPIN GNSS Network and contributed to the design of the network over the Lombardia area.
• This is the first Italian inter-regional network for real time applications, and allows for precise positioning (5-6 cm precision).
GNSS Techniques The SPIN GNSS RTK network
Users connections in June 2017 (blue dots = GNSS stations)
The SPIN GNSS network consists of 30 GNSS permanent stations connected to a computing center managed by CSI Piemonte.
Geodesy and Geomatics Section - DICA
GNSS Techniques Permanent GPS networks for deformation monitoring
ALPS-GPSQUAKENET project
- The network has been designed for monitoring the deformation of the Alpine area - More than 35 GPS permanent stations have been processed at the GG Section
Geodesy and Geomatics Section - DICA
GNSS Techniques Non-permanent GPS networks for deformation monitoring
THE POLLINO NETWORK Monitoring of the deformations related to the
Castrovillari fault (Pollino seismic gap)
Geodesy and Geomatics Section - DICA
Theodolite TS 30 Leica
Angular rms = 0.5”
Distance rms = 0.5 mm + 0.5 ppm
DATUM WGS84
3D Coordinates
Traverse survey
Trellis pattern: 250/500 m distance between points.
500 m
1-2
m
GNSS Techniques Geodetic survey at INFN GS lab – Tunnel measurements
Accuracy GPS baseline CERN - INFN = 1 cm Traverse survey = 3 cm Point inside the lab = 2-3 cm
Total accuracy less than 4 cm
Geodesy and Geomatics Section - DICA
GNSS signals are delayed by the tropospheric water vapor content. Time series of estimated delays can be derived from the data collected by each station of already existent permanent networks or new networks ad hoc deployed.
The use of dense networks of cost-effective GNSS receivers is one of the topic of our research. The augmented spatial resolution of such networks can be exploited in the prediction of local heavy rains, especially if assimilated in high resolution numerical weather prediction models.
GNSS Techniques GNSS for troposhere water vapor monitoring
Geodesy and Geomatics Section - DICA
GNSS derived tropospheric water vapor delays have been used to validate water vapor maps derived from SAR interferometry. Integration of GNSS and SAR products are under study also within the ASI project SINERGY (call for new concepts of mission and payload for Earth Observation) An ESA project called STEAM will soon start on the assimilation of GNSS water vapor products in high resolution numerical weather prediction models.
The use of low-cost networks and new Sentinel SAR products will be tested in the framework of the recently approved H2020 project TWIGA for the forecasting of heavy rain events in sub Saharian regions
GNSS Techniques GNSS for troposhere water vapor monitoring
Geodesy and Geomatics Section - DICA
GNSS Techniques Low cost GNSS receivers for local deformation monitoring
The monitoring of deformations at the local scale can require dense networks of stations for some applications (for example landslides). For economical reasons, networks of geodetic GNSS receivers cannot be always established for local monitoring. The use of low cost (≈ 500 E) GNSS receivers provide a reasonable alternative. Do they provide accurate and reliable estimates for monitoring purposes? Experiments with networks of low cost receivers and simulated (known) displacements. Comparisons of known and estimated positions. Encouraging results.
Geodesy and Geomatics Section - DICA
IVS Network
Lander CE-3
GNSS Techniques and VLBI Near Field Target Positioning by geodetic VLBI
Interferometric response for natural radio source 3c286
GLONASS satellite PR21 artificial signal
IVS PMD: Associate Analysis Center of the “International VLBI Service” Observations of GNSS satellites (2010-2017) and Lander Chang-3 (2017)
Space-ties to improve Global Reference Frames
Geodesy and Geomatics Section - DICA
Distorted
image Undistorted
image
Geometric calibration
Radiometric calibration
Targets with known reflectance
Tetracam ADCLite Sequoia Optris PI MAPIR/ SJ Cam GoPro
Geometric and radiometric calibration of light multispectral sensors for UAV
Photogrammetry UAS sensors calibration
Geodesy and Geomatics Section - DICA
Flight path and control points
Digital Surface Model
Texturized DSM
NIR-RED-GREEN
NDVI Thermal ortophoto
Photogrammetric block adjustment
UAS, sensor characteristics and test field
Photogrammetry UAS applications in agriculture
Geodesy and Geomatics Section - DICA
Photogrammetry UAS applications in forestry
Non native species detection
Ground masking
DSM
Supervised classification Cisano Bergamasco
Parco Adda nord
Multispectral and multitemporal orthophotos Multispectral image processing and tree species classification
Geodesy and Geomatics Section - DICA
Photogrammetry 3D reconstruction
Villa Castelbarco
3D reconstruction from
photogrammetric takes and
topographic survey.
3D bas-relief reconstruction
with AGIsoft photoscan.
Geodesy and Geomatics Section - DICA
A unique DTM for the alpine and
subalpine area between Italy
(Piedmont and Lombardy) and
Switzerland (Ticino and Grisons
Cantons) has been computed
starting from data acquired from
different DTMs, in different
reference frames and obtained with
different technologies, accuracies,
and resolutions.
The project was funded by the
European Regional Development
Fund within the Italy-Switzerland
cooperation program.
HELvetia-Italy Digital Elevation Model project http://www.helidem.eu/
Digital Terrain Models HeliDEM
Geodesy and Geomatics Section - DICA
GEOLab is an Inter-Departmental Research Laboratory of POLIMI since 2014. Four Departments: CIVIL AND ENVIRONMENTAL ENGINEERING (DICA), ARCHITECTURE, BUILT ENVIRONMENT AND CONSTRUCTION ENGINEERING (DABC), ELECTRONICS, INFORMATION AND BIOENGINEERING (DEIB), AEROSPACE SCIENCE AND TECHNOLOGY (DAER).
Focus on Earth Observation: acquisition, modelling, analysis, representation and management of data of EO from space.
GEOLab – An Inter-Departmental Research Laboratory
Geodesy and Geomatics Section - DICA
Critical variable for climate modelling, biodiversity monitoring, etc.
Increasing availability of high resolution EO and open data
Geographic Information Systems Land Use / Land Cover (LULC)
Geodesy and Geomatics Section - DICA
Integration between new openly released Earth Observation data (e.g. Copernicus satellite images) with the emergent phenomenon of Citizen Science
Geographic Information Systems Earth Observation and Citizen Science
Geodesy and Geomatics Section - DICA
Development of tools to exploit Earth Observation data and, generally, Big Geo Data for solving urban areas issues (PRIN project)
Geographic Information Systems Earth Observation and Urban Geoservices
Geodesy and Geomatics Section - DICA
“Life happens in (at least) three dimensions, so why doesn't science?”
3D Virtual Globes offer a more realistic way to represent/visualise the world
Geographic Information Systems Web visualisation and 3D Virtual Globes
Geodesy and Geomatics Section - DICA
Geographic Information Systems Applications for Historical Research
Design and implementation of a georeferenced DB and GeoService for historical research.
• Data from historical archives: census and fiscal data. • Period: XV century. • Area: modern-day Apulia (Principality of Taranto)
Geodesy and Geomatics Section - DICA
GIS and cartography Applications for Historical Research
Study of cartographic deformations on ancient maps.
Milano Abbiategrasso
Rho
Legnano
An example: the «Cotton map» (140 cm x 66 cm), British Library (London), Cotton Charter Archive XXIII.44.
Hand drawn on parchment by an Italian author at the end of the XV century.
Deformations in the Northern part of the map, based on 62 check points.
Geodesy and Geomatics Section - DICA
Geomatics activities in co-operation with GReD GReD is a spin-off of Politecnico di Milano
H2020 Industrial Leadership Projects
BRIGAID – Water vapour
monitoring by low-cost GNSS
Industrial innovative services
for geodetic monitoring
Deformation monitoring by
low-cost GNSS
Processing and inversion of gravity
data for oil & gas major companies
Gravity disturbances from airborne
survey [mGal]
A reality of excellence in R&D providing innovative
solutions based on geomatics technologies.
Main strength of the company is the expertise in the
field of acquisition, analysis and management of geo-
spatial data, required for the control, understanding
and knowledge of the territory and its processes.