Differentiation between Global and Local Datum from Different aspect Nzar Braim
Differentiation between Global and Local Datum from Different aspect
Spatial professionals are required to deal with an increasingly wide range
of positioning information obtained from various sources including
terrestrial surveying, Global Navigation Satellite System (GNSS)
observations and online GNSS processing services. These positions refer
to a multitude of local, national, and global datums. A clear understanding
of the different coordinate reference systems and datums in use today and
the appropriate transformations between these are therefore essential to
ensure rigorous consideration of reference frame variations to
produce high-quality outcomes in spatial data analysis tasks.
Report Assignment 2 for Site Surveying module which requires us to do Traversing measurement around the campus carpark, for the Bachelor of Quantity Surveying (BQS) Course Semester 2, Taylor's University Lakeside Campus
Differentiation between Global and Local Datum from Different aspect Nzar Braim
Differentiation between Global and Local Datum from Different aspect
Spatial professionals are required to deal with an increasingly wide range
of positioning information obtained from various sources including
terrestrial surveying, Global Navigation Satellite System (GNSS)
observations and online GNSS processing services. These positions refer
to a multitude of local, national, and global datums. A clear understanding
of the different coordinate reference systems and datums in use today and
the appropriate transformations between these are therefore essential to
ensure rigorous consideration of reference frame variations to
produce high-quality outcomes in spatial data analysis tasks.
Report Assignment 2 for Site Surveying module which requires us to do Traversing measurement around the campus carpark, for the Bachelor of Quantity Surveying (BQS) Course Semester 2, Taylor's University Lakeside Campus
Surveying is the technique, profession, and science of determining the terrestrial or three-dimensional positions of points and the distances and angles between them.
Surveying is used to prepare military map, geological map, archaeological map.
unit I
Introduction and Basic Concepts: Introduction, Objectives, classification and principles of
surveying, Scales, Shrinkage of Map, Conventional symbols and Code of Signals, Surveying
accessories, phases of surveying.
Measurement of Distances and Directions
Linear distances- Approximate methods, Direct Methods- Chains- Tapes, ranging, Tape corrections.
Prismatic Compass- Bearings, included angles, Local Attraction, Magnetic Declination and dip.
Survey Camp presentation of geomatics engineeringAnish Chhetri
This slide is a guide for the Tribhuvan University students for preparing the final presentation report about their survey camping. Mostly it helps geomatics engineering students who do their 10 days field survey in their 5th semester.
Surveying is the technique, profession, and science of determining the terrestrial or three-dimensional positions of points and the distances and angles between them.
Surveying is used to prepare military map, geological map, archaeological map.
unit I
Introduction and Basic Concepts: Introduction, Objectives, classification and principles of
surveying, Scales, Shrinkage of Map, Conventional symbols and Code of Signals, Surveying
accessories, phases of surveying.
Measurement of Distances and Directions
Linear distances- Approximate methods, Direct Methods- Chains- Tapes, ranging, Tape corrections.
Prismatic Compass- Bearings, included angles, Local Attraction, Magnetic Declination and dip.
Survey Camp presentation of geomatics engineeringAnish Chhetri
This slide is a guide for the Tribhuvan University students for preparing the final presentation report about their survey camping. Mostly it helps geomatics engineering students who do their 10 days field survey in their 5th semester.
Brilliant Lecture delivered to me in Alagappa Engineering college Workshop.
The Global Positioning System (GPS) is a satellite
based radio navigation system provided by the
United States Department of Defence. It gives
unequaled accuracy and flexibility in positioning
for navigation, surveying and GIS data collection.
The global positioning system is a spaced based satelite navigation system that provides location time information in all weather conditions , anywhere on or near the earth where there is an unobstructed line of sight to four or more GPS satellites.
Developed and maintained by the US Department of Defense (DOD)
GPS helps us identify exact location of a place/feature in the globe. Now-a-days we can carry out survey, enter data and process data. GPS is very helpful in soil survey
Global Positioning System (GPS) is the only system today able to show one’s own position on the earth any time in any weather, anywhere. This paper addresses this satellite based navigation system at length. The different segments of GPS viz. space segment, control segment, user segment are discussed. In addition, how this amazing system GPS works, is clearly described. The various errors that degrade the performance of GPS are also included. DIFFERENTIAL GPS, which is used to improve the accuracy of measurements, is also studied. The need, working and implementation of DGPS are discussed at length. Finally, the paper ends with advanced application of GPS.
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
HOT NEW PRODUCT! BIG SALES FAST SHIPPING NOW FROM CHINA!! EU KU DB BK substit...GL Anaacs
Contact us if you are interested:
Email / Skype : kefaya1771@gmail.com
Threema: PXHY5PDH
New BATCH Ku !!! MUCH IN DEMAND FAST SALE EVERY BATCH HAPPY GOOD EFFECT BIG BATCH !
Contact me on Threema or skype to start big business!!
Hot-sale products:
NEW HOT EUTYLONE WHITE CRYSTAL!!
5cl-adba precursor (semi finished )
5cl-adba raw materials
ADBB precursor (semi finished )
ADBB raw materials
APVP powder
5fadb/4f-adb
Jwh018 / Jwh210
Eutylone crystal
Protonitazene (hydrochloride) CAS: 119276-01-6
Flubrotizolam CAS: 57801-95-3
Metonitazene CAS: 14680-51-4
Payment terms: Western Union,MoneyGram,Bitcoin or USDT.
Deliver Time: Usually 7-15days
Shipping method: FedEx, TNT, DHL,UPS etc.Our deliveries are 100% safe, fast, reliable and discreet.
Samples will be sent for your evaluation!If you are interested in, please contact me, let's talk details.
We specializes in exporting high quality Research chemical, medical intermediate, Pharmaceutical chemicals and so on. Products are exported to USA, Canada, France, Korea, Japan,Russia, Southeast Asia and other countries.
NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
263778731218 Abortion Clinic /Pills In Harare ,sisternakatoto
263778731218 Abortion Clinic /Pills In Harare ,ABORTION WOMEN’S CLINIC +27730423979 IN women clinic we believe that every woman should be able to make choices in her pregnancy. Our job is to provide compassionate care, safety,affordable and confidential services. That’s why we have won the trust from all generations of women all over the world. we use non surgical method(Abortion pills) to terminate…Dr.LISA +27730423979women Clinic is committed to providing the highest quality of obstetrical and gynecological care to women of all ages. Our dedicated staff aim to treat each patient and her health concerns with compassion and respect.Our dedicated group ABORTION WOMEN’S CLINIC +27730423979 IN women clinic we believe that every woman should be able to make choices in her pregnancy. Our job is to provide compassionate care, safety,affordable and confidential services. That’s why we have won the trust from all generations of women all over the world. we use non surgical method(Abortion pills) to terminate…Dr.LISA +27730423979women Clinic is committed to providing the highest quality of obstetrical and gynecological care to women of all ages. Our dedicated staff aim to treat each patient and her health concerns with compassion and respect.Our dedicated group of receptionists, nurses, and physicians have worked together as a teamof receptionists, nurses, and physicians have worked together as a team wwww.lisywomensclinic.co.za/
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
GIS & History of Mapping in Malaya (lecture notes circa 2009)
1. Präsentat
ion
Geographical
Information System
(GIS) & History of
Mapping in Malaya
Dr Azmi Mohd Tamil
Universiti Kebangsaan Malaysia
(National University of Malaysia)
https://drtamil.me
Incidence Mapping
Geographical
Information
System
Global Positioning System
2. What is GIS?
A computer system for capturing,
storing, checking, integrating,
manipulating, analysing and
displaying data related to
position on a surface.
AGI GIS Dictionary
(http://www.geo.ed.ac.uk/agidic/welcome.html)
3. GIS (Geographic Information System)
• Geographic Maps
• Information Database
• System Hardware, Software, Data,
People, Plans/Programs
GIS combines the intuitive visual clarity of a map together with
the information structuring, searching and analysing power of a
database.
4.
5. Layers for GIS
Other Thematic Data
Elevation
Geodetic Control
Imagery
Government Units
Hydrography
Transportation
Cadastral
Framework or Core Data
Spatial Data
Social
Economic
Biological
Landcover
Demographic
Flood Zones
7. GIS in Health
• Possible applications include mapping the
health of populations, identifying patterns
of disease transmission, and locating foci of
risk. Geographical methods can also be
applied in health administration and health
economics.
8. Early Use of GIS in Health
• In 1854 Dr. John Snow was able to pinpoint a cause of cholera outbreak In London
by the following:
“…He went to the Register of Deaths and got details of all the deaths from cholera
in the Golden Square, Berwick St and St Anne's, Soho, districts and plotted the
distribution of deaths in London on a map. He determined that an unusually high
number of deaths were taking place near a water pump on Broad Street. Snow's
findings led him to petition the local authorities to remove the pump's handle. This
was done and the number of cholera deaths was dramatically reduced…”
• The work of Doctor Snow stands out as one of the most famous and earliest cases
of geography and maps being utilized to understand the spread of a disease.
http://www.bbc.co.uk/history/historic_figures/snow_john.shtml
9. Early use of GIS in Health ;-)
• Outbreak of Cholera in London, 1854
• Spot map of the cases by John Snow
12. What is Global Positioning
System (GPS) ?
A very precise positioning system
• Developed and maintained by the
US Department of Defense (DOD)
• Satellite Based
* 24 satellites
* 20,200 km high orbit
14. How GPS Works ………
Uses measurements from 4+ satellites
Distance = travel time x speed of light
Source:Trimble
15. Determining GPS Position
• Suppose the distance from
Satellite A to our position is
11,000 miles
• At this point we could be located
anywhere on the specified sphere
Satellite A
+
• Next, let us take another measurement
from a second satellite, Satellite BSatellite B
+
• Now our position is narrowed down to the
intersection of theses two sphere
16. Satellite C
+
Determining GPS Position
Satellite A
Satellite B
+
+
• Taking another measurement
from a 3rd satellite narrows our
position down even further, to
the two points
• So by ranging from 3 satellites we can
narrow our position to just two points in space
• These points are located where
the 3rd sphere cuts through the
the intersection of first two spheres
17. Satellite C
+
How do we decide which one is our
true location?
Satellite A
Satellite B
+
+
• We could make a 4th measurement
from another satellite to determine
the true point
• However, GPS receivers use a 4th satellite to precisely
locate our position
• We can eliminate one of the two
points that gives a ridiculous
answer
• The ridiculous point may be too
far from the earth
OR
18. GPS
• GPS: uses satellites to pinpoint the location
of receivers on earth. Handheld Navigation
19. How accurate is GPS?
Depends on some variables
• Design of receiver
• Relative positions of satellites,
technically known as PDOP (Position
dilution of precision)
• Post-processing
• Time spent on measurement
20. Possible Source of Inaccuracies
• Satellite clocks (atomic)
• Atmospheric delays
• Multi-path
• Receiver clocks (time
recalibrated upon
receiving good signal
from satellites).
• PDOP
• SNR
GPS Error Sources
Receiver Clock Error
1000
L1
L2
9
6
3
12
9
6
3
12
Satellite Clock Error including
Ionospheric refraction
Multi-path
Tropospheric Delay
Satellite Orbit Error
?
? ?
21. Multipath
• When GPS signals arrive at the receiver
having traveled different paths
22. What is a PDOP?
• Position Dilution of Precision
Good PDOP Poor PDOP
23. SNR (signal-to-noise ratio)
• SNR determines the signal strength
relative to noise
• GPS position is degraded if the SNR of
one or more satellites in the
constellation falls below certain range
Signal Strength
Indicators
24. How Accurate is the Spatial Data?
• If we want sub-meter accuracy, then we would
have to use specialised GPSr surveying equipment
such as;
– DGPS (Differential GPS) - higher accuracy in terms of position. It
gets differential data live from a ground base station (Kuantan) and
compare them with the actual current position, using some
algorithm to get a better accuracy. Additional hardware required
and not available for Garmin GPSr.
– MyRTKnet - a nation-wide GPS network and system infrastructure
developed for GPS users to provide RTK and DGPS services with
unmatched accuracy. A wide-area satellite based service, the
broadcast My RTKnet corrections can be obtained anywhere in
Malaysia using a custom-built MyRTKnet GPS receiver.
– P-DGPS (Post-Processing Differential GPS) works the same way,
but not in real time. You would store your data elsewhere (storage
card, PPC on Notebook), then compare them with data registered
by a nearby MASS station at the same time you recorded yours.
This recalculation would give you a below 1 meter accuracy.
26. SIRFstarIII
• Instead we will use a medium cost GPSr with
SIRFstar III chip which give us an accuracy of
within 3 meters or less (USD540)
• It has a horizontal position accuracy of less than
2.5m. Supports multiple reference frequencies.
Also supports SiRFDRive dead reckoning
technology for enhanced positioning accuracy and
availability.
27. How Accurate is the Spatial Data?
To reduce inaccuracy, the spatial measurement should be;
• Taken with a SIRFstarIII GPSr such as Garmin
GPSMap 60Csx.
• GPSr properly configured – i.e. Map Datum = WGS84
for own map, or Kertau 48 if using JUPEM maps.
• For mapping;
– Using an external antenna
– Tracking interval on GPSr set to every 1 second
– Locked-On-Road=OFF
– done using active log tracks only (ie. not using the tracks that
are saved to the GPSr)
29. History of Mapping
• The first attempt at triangulation survey was made in Penang in 1832
by Lieutenant Woore of the Royal Navy.
• In 1885, H.G. Deanne, a contract surveyor from Ceylon, was
appointed by the Public Works Department, Perak, to carry out the
Trigonometrical survey of Perak. He measured the 4.6 mile Larut
baseline and carried out astronomical determinations for latitude and
azimuth near Taiping.
• This Trigonometrical Survey in Perak together with the Penang and
Province Wellesley triangulations and Malacca Triangulation (1886-
1888), laid the foundation of the existing control framework. These
foundations were still primitive, progress was frequently sporadic and
much of the work was found to be substandard. However, by the end
of 1901, the Major Triangulation of Perak and Selangor had been
completed and work had been in progress in Negeri Sembilan since
1899. This period also witnessed the commencement of
trigonometrical surveys in various parts of the country.
30. MRT48 & MRT68
• However, the quality of the early works were so
inconsistent that it was decided to re-observe the principal
triangles of the general triangulation with the object of
bringing the work up to modern standards.
• This triangulation scheme in Peninsular Malaysia was
known as the Primary or Repsold Triangulation which was
completed in 1916.
• In 1948, it was replaced by a new system known as the
Malayan Revised Triangulation (MRT). This was followed
by a lengthy process of additional measurements and
recomputation until 1968.
• As a result, this system is then referred to as MRT68. On
the other hand, the geodetic network used in Borneo is
called the Borneo Triangulation (BT68).
31. American Mapping Service
• In 1965, the American Mapping Service
(AMS) carried out an internal re-adjustment
of the MRT in order to connect it to the
South East Asia Datum (SEA Datum). In
1965, AMS re-adjusted the MRT data in the
South East Asia Datum using three
triangulation points in Thailand held fixed.
32. World Geodetic System 1972
• In 1978, the British Army Survey carried out a
Doppler campaign in Peninsular Malaysia, Sabah
and Sarawak in order to connect the local network
to the World Geodetic System 1972 (WGS 72).
The network consists of 5 points of the MRT and
5 points of BT68. The given accuracy is of the
order of three metres. However, the observations
were never used for any re-adjustment of the MRT
and BT68.
33. STRE 1993
• In November 1993, a group from the Squadron of Technical Royal Engineers
(STRE) of the United Kingdom observed with TRIMBLE GPS L1/L2
receivers on 5 existing Doppler points and 9 new GPS stations in Peninsular
Malaysia.
• In addition to that, 7 existing Doppler points and 4 old trigonometric stations
were also observed in Sabah and Sarawak.
• The aim is to establish better transformation parameters from Doppler to
WGS84 for the region and to connect Peninsular Malaysia to Sabah and
Sarawak.
• In Dec, 1993, the GPS observations were successfully completed and
computations and analysis were subsequently conducted based on the WGS84
reference frame.
• Results of STRE adjustments show that the absolute accuracy of WGS84
coordinates is at the 1m level for the X,Y and Z axes respectively.
34. GEODYSSEA Project
• This project which was initiated in 1994 and was completed in 1997, was to
study the plate motion and crust deformation in the region of the South and
South East Asia.
• GPS campaigns were carried out in December 1994 and April 1996 to study
such motions. This is followed by a GEODYSSEA Symposium in April 1997
in which results of the campaign were tabled and discussed.
• Even though the GEODYSSEA project was officially terminated in 1997, the
studies in the geodynamics of the region were still pursued with a GPS
campaign carried out in October 1998. The purpose of the endeavour was to
further gauge and confirm the plate movements in the region as initiated by the
GEODYSSEA project.
• With the availability of such data, a time series dynamics of the region could
be collected and studied. From the two GPS campaigns of 1994 and 1997, a
zero order network had also been able to be set-up in Malaysia with
coordinates referring to ITRF94 and ITRF96 and with an absolute accuracy of
better than ± 3cm.
38. Datums
• A geodetic datum is a reference model of the Earth,
designed to fit all or part of the geoid
• Datums provide the surface to which ground control
measurements are referred, and are used as reference
systems for navigation, surveying and mapping
• A datum is defined by a
specific ellipsoid and a unique
point of origin
Origin
39. Common Datums
Name Ellipsoid Origin
WGS 84 WGS 84 Earth’s centre of mass
NAD 27 Clarke
1866
Meades Ranch, KS
NAD 83 GRS 80 Earth’s center of mass
(BIH BTS-84)
40. Regional Datums
North American Datum
Clarke 1866
South American Datum
International Arc Datum
Clarke 1880
European
Datum
International
WGS72 Datum
Tokyo Datum
Bessel
Most widely used local Datum/Ellipsoid pairs
43. So WGS 84 is no longer a
mystery……
How about Kertau 48?
44. History of M’sian Map Datum
• In the past, before the advent of GPSr and the
GPS satellites, mappers determined the
coordinates of an origin as best as they could,
then they measured the distances and the
bearings of other places, using the origin as the
reference point.
Even with the best possible method that they
have, the coordinates of the origin may be
incorrect.
45. Kertau
• For example the origin
for our national map
datum used to be
Kertau.
• Why Bukit Kertau?
Although it is not the
highest point (only
269.3m), it is centrally
located in Peninsular
Malaysia.
46. GEODETIC DATUMS
Datum
Kertau 1948 or MRT
1948
Coordinate Frame
77 positions of Repsold
Triangulation,
orientation at Kertau,
scale very few.
Reference Ellipsoid
Modified Everest
Origin at Kertau (ξ=0, η=0, N=0)
P. Malaysia
47. Kertau Measurement Disparity
REPSOLD Main
Triangulation
1913-
1916
N 3o 27'
53.96"
E 102o 37'
24.65"
Malayan Revised
Triangulation 1948
(MRT48)
1948 N 3o 27'
50.71"
E 102o 37'
24.55"
MRT68 1965 N 3° 27 '
50.71"
E 102o 37'
24.55"
WGS 84 STRE
1993
N03o 27'
49.911"
E102o 37'
18.943"
ITRF 94 GEOD
YSSEA
1996
N03o 27'
49.893"
E 102o 37'
18.936"
48. Kertau “Moved”
• 1 longitudinal degree is roughly 111.324
km. Since 1913, Kertau has "moved"
roughly 177m.
• Peninsular maps using MRT48 has to be
"moved" (corrected) almost 200m to the
North-West to correct the coordinates to
conform with WGS84.
49.
50. 10 coordinate systems in Malaysia
1. Old Cassini-Soldner for Peninsular Malaysia (E, N)
2. Old Rectified Skew Orthomorphic for Peninsular Malaysia (E, N)
3. Old Rectified Skew Orthomorphic for East Malaysia (E, N)
4. Malayan Revised Triangulation (f, l, h)
5. Peninsular Malaysia Primary GPS Network (f, l, h and X, Y, Z)
6. East Malaysia Primary GPS Network (f, l, h and X, Y, Z)
7. Geocentric Datum of Malaysia (f, l, h and X, Y, Z)
8. New Cassini-Soldner for Peninsular Malaysia (E, N)
9. New Rectified Skew Orthomorphic for Peninsular Malaysia (E, N)
10. New Rectified Skew Orthomorphic for East Malaysia (E, N)
51. Most Maps Are MRT68
• From MRT68, map
projections were done
using Rectified Skew
Orthomorphic (RSO).
• For cadastres, Cassini
Soldner were used.
• The existing Cassini
projection system
used for cadastral
application in the
Peninsular is based on
local MRT datum.
53. 9 Peninsular State Cassini-coordinate systems
• The latitude and longitude of the origins
are not referred to a single triangulation
system but 9!
Gunung Perak for Perlis & Kedah
Fort Cornwallis for Penang & Province
Wellesly
Hijau Larut for Perak
Bukit Asa for Selangor/Kuala Lumpur
Gun Hill for Melaka & N. Sembilan
Gunung Belumut for Johor
Gunung Sinyum for Pahang (not
Kertau!)
Gajah Trom for Terengganu
Bukit Panau for Kelantan
• That is why we have to ask what is the
datum of the map being used (i.e.
MRT48/MRT68) since the conversion
of the coordinates of the GPSr differ
according to the datum.
54. Adopt GDM2000
• Since then, we have progressed to PMGGN
(WGS84) in 1989. Now in 2003, JUPEM
have adopted GDM2000 (GRS80).
• The introduction of GDM2000 will have a
significant effect on the topographical
mapping products : the coordinates (shift)
of points by up to approximately 200 meters
in northeasterly and northwesterly
directions for Peninsular and East Malaysia,
respectively.
55. Geocentric Cassini
Coordinate System
• With the adoption of GDM2000, the
existing Cassini projection system used for
cadastral application will be converted to
Geocentric Cassini Coordinate System.
• For topographical mapping application in
Malaysia, conversion will be done from
RSO & Borneo RSO into Geocentric RSO
Coordinate System.
56. 9 New Origins
• To assist in the process, nine new origins (9 primary GPS
stations) are selected in the vicinity of the old origins with
their coordinates accurately defined in the GDM2000.
The new origins are;
GP58 Institut Haiwan,Kluang
GP12 Lubuk China, Melaka
GP31 Kuala Mai, Jerantut
MASS Station Wisma Tanah, Jalan Semarak, Kuala Lumpur
P253 Kg. Matang, Hulu Terenganu
P314 TLDM Georgetown
TG35 Gunung Perak, Kuala Muda
TG26 Gunung Larut Hiijau, Taiping
P222 Ulu Kelantan
57.
58. Conclusion
• Ask what is the datum of the map being
used (i.e. MRT48/MRT68) since the
conversion of the coordinates of the GPSr
differ according to the datum.
• Otherwise we may end up 193 meter away
from the correct position.