THE ROLE OF NATIONAL SURVEY
AUTHORITY (NSA) IN PROVIDING
GEOSPATIAL DATA THAT CAN BE
USED AS SOLUTION FOR FLOODING
PROBLEMS
Major (Eng)
Mahfoodh Al Araimi
SO2 Production Control
TOPICs:
1. NATIONAL SURVEY AUTHORITY
1)
2)
3)
4)
Brief of NSA
NSA’s Mission
NSA’s Capabilities
NSA Projects
2. THE USE OF GEOSPATIAL DATA IN FLOODING PROBLEMS
1) Definition of Geospatial Information
2) Geospatial Data and Flood Management
NSA – BRIEF
NSA MISSION
To establish and enforce standards for topographic surveys
and mapping and to manage and maintain the national
archive of geographic materials; and further, to revise and
provide maps, air charts and other geographic information for
the Sultanate’s Ministries to enable them to carry out their
function of government, and for the Sultan’s Armed and
Security Forces to enable them to plan, train and protect the
Sultanate’s territory.
The Charter (1)
The NSA is to:
 Provide and revise land maps, aeronautical charts and other
geographic materials. These may be in graphic or computer
readable form.
 Define, publish and enforce national standards for all aerial
photography, surveys and map production.
 Establish and maintaina)
b)
c)
d)
e)
National geodetic control network
Topographic database
National geographic materials library
National aerial photographs archive
Depot to stock geographic materials
The Charter (2)
The NSA is to:
 Provide advice and survey support to the authorities engaged
in the demarcation of the international boundaries of the
Sultanate.
 Co-ordinate the tasking, acquisition and distribution of satellite
imagery and remote sensing data, and establish and maintain a
national archive of the materials from these sources.
 Organise the provision and distribution of geographic
information required by the SAF.
The Charter (3)
The NSA is to:
 Establish and maintain liaison on geographic matters with
international survey and mapping organisations, foreign
government survey and mapping authorities, learned societies,
universities and other training establishments.
 Support the hydrographic charting activities of the Royal Navy
of Oman (RNO).
 Operate at all times in a cost-effective and business-like
manner
NSA Developments & Projects
NSA is building the infrastructure for
Geospatial data and its Standards
The common element for
standardizing geographic
information is to ensure that location
definition is standardized
NSA currently has three projects, that are
approved and will ensure that all location
information in Oman can be standardized
using Oman local datums (Vertical and
horizontal datums). These projects are:
1. Oman National CORS Network
2. Oman National Geoid Model
3. Oman National Geodetic Datum
Establishment of the “Oman
National Continuous Operating
Reference Stations Network
(ONCN)” – A network of
Continuous Operating Reference
Stations (CORS) that will
continuously record Global
Positioning System (GPS) signals
and provide organizations,
within the Sultanate of Oman,
real time as well as postprocessing positioning
capabilities using single GPS
receivers (Rover).
• OMAN NATIONAL CORS NETWORK (ONCN) FOR THE
SULTANATE OF OMAN
– ONCN network project aims to minimize GPS signal distortion
and maximize the quality of positioning on the ground
– ONCN network shall become the impetuous for modern
satellite-based 3D positioning applications in The Sultanate of
Oman.
– Key to establishing:
• Oman National Geoid Model (ONGM)
• Oman National Geodetic Datum (ONGD14)
• Oman National Spatial Database Infrastructure (ONSDI).
Establishment of “Oman National Geoid Model
(ONGM)” – A height modernization effort by
developing a gravity network that will enable all
organizations within the Sultanate of Oman to
determine accurate orthometric heights.
• ESTABLISHMENT OF OMAN NATIONAL GEOID
MODEL (ONGM) FOR THE SULTANATE OF OMAN
– Geoid fitting to local height datum is to be carried out to
provide the country with precise GPS fitted geoid model
within the proposed ONCN network working environment
– Creation of Combined Gravity Database and Precise
Gravimetric Geoid Model Database
– Key to establishing:
• Oman National Spatial Database Infrastructure (ONSDI).
Establishment of “Oman National Geodetic Datum (ONGD)” – A definition for
the coordinate system to be used by all organizations within the Sultanate of
Oman.
Other Projects within NSA’s Initiatives
New 50K & 100K Mapping
NATIONAL CENTRE for STATISTICS &
INFORMATION (NCSI)
NSA Involvement:
•
CORS / GCP network
•
QA/QC
•
Data model
Deliverables:
•
Full Stereo coverage of Oman
•
5m DTM / 2m contours
•
50cm orthophoto mosaics
•
5K hydro & transportation network
TOPO50K/100K PROJECT
•Source - SCP data
•Production (2 years):
•Data collection-Contractor
•Data verification-NSA
•Map finishing-Contractor
•Printing-NSA
•QA/QC-NSA
•Deliverables:
•Very accurate vector data
of entire country
•497 50K TLMs
•134 100K TLMs
NSA GEOSPATIAL DATA BASE
Establishment
of the National Data
Model and Base Map
Creation of National Geospatial Database Infrastructure (NGSDI)
Google
Web Service
e.g. World
Weather Warnings
Google Maps
Potential
Cyclone
Oman Agency Data
To Be Shared
Oman Agency #2
Database
Oman
Agency #1
Database
Oman
Agency #3
Database
Oman National GeoSpatial
Authority
GeoPortal
‫الهيئة الوطنية للمساحة‬
‫الهيئة الوطنية للمساحة‬
NSA Data Type
3D Model
Raster Map
3D Map
3D Ortho Rectified Imagery
Vector Data
3D Data
MPWS : OnPoint
Enables users (Military, Public, Internal) to view NSA
holdings through a web based.
Thank you