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FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 1116 April 2010 1 Evolutionary Process of the Development of Spatial Data Infrastructure (SDI) in Hong Kong Agenda What, Why necessary, Who is responsible & Way forward Dr Conrad Tang Dept. of Land Surveying & GeoInformatics The Hong Kong Polytechnic University 1 Mr Lesly LAM Land Surveying Division The Hong Kong Institute of Surveyors What is SDI in HK now? 2 Hong Kong SAR Government Geospatial Information Hub (GIH) 2004. GIH is a webbased geographic information portal within the government. digital maps and aerial photographs lot boundaries and land use zonings Dangerour slope; trees; population & health data… A Lands Department initiative

ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! [email protected] Conrad Tang [email protected] Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

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Page 1: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  1 

Evolutionary Process of the Development of Spatial Data Infrastructure (SDI) in Hong Kong 

 Agenda 

What, Why necessary,  Who is responsible & Way forward 

Dr Conrad Tang Dept. of Land Surveying & Geo‐Informatics The Hong Kong Polytechnic University 

 

Mr Lesly LAM Land Surveying Division 

The Hong Kong Institute of Surveyors 

 

What is SDI in HK now?  

• Hong Kong SAR Government 

• Geospatial Information Hub (GIH)  

• 2004. GIH is a web‐based geographic information portal within the government. 

– digital maps and aerial photographs 

– lot boundaries and land use zonings 

– Dangerour slope; trees; population & health data… 

• A Lands Department initiative  

Page 2: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  2 

1:50,000 and 1:20,000 of  

Hong Kong 

Paper Maps

1:5000  and 1:20,000  of  Hong Kong 

Page 3: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  3 

1:1000 map of  Hong Kong 

(Basic Mapping System & Cadastral Information System) 

  

3010 sheets   

750m(E) x 600m (N) 

Page 4: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  4 

Comparison between paper and digital maps

Page 5: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  5 

Lands Department 

Computerized Land Information System Data Alignment Measure Geospatial Information Hub Data Dissemination System

Buildings Department 

10 

Geographical Information System for Buildings Department BDGIS

Page 6: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  6 

Census & Statistics Department 

11 

Page 7: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  7 

Transport Department 

13 Consultant: Dept. of LSGI, HKPU

Yellow Pages 

14 

Page 8: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  8 

15 

All credit cards  promotional discounts 

Mobile GIS – “Locating Jetso” 

16

Landslide Incident

Aerial Photo

HPA Catchment

Typical Spatial Data

Page 9: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  9 

Data Acquisition: Digital aerial photo 

Y‐5  is a small, single‐engine, general‐purpose  bi‐plane with good low altitude performance. In China, it is used for 1:500 scale for digital photogrammetry.  

 

Courtesy of ARSC

1:500  Digital Ortho Map 

18 Courtesy of MTR

Page 10: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  10 

19 Courtesy of MTR

1:500  Digital Line graph 

20 

Data Acquisition: Mobile Mapping System 

Courtesy from Topcon HK

Page 11: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  11 

21 Courtesy from Topcon HK

22 Courtesy from Topcon HK

Page 12: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  12 

Why is SDI necessary? 

• Intuitively, it is a part of our daily live.  

 

• For mutual understanding of the phenomena (What do I mean = What do you mean) 

• For data sharing 

• For consistency in management 

• For avoiding duplication in data capture 

• For resource saving 

23 

24

Page 13: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  13 

25

 Feature definition & what constitute a record? 

?

What’s the assessment value of this quarter?

Census Quarter

Land Registry Transaction

Rating & Valuation Tenement

Adverse possession !

Page 14: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  14 

Floor Description Problem 

1/F

2/F

3/F

4/F

5/F

6/F

7/F

CP1

CP2

1/F

2/F

3/F

4/F

5/F

12/F

15/F

16/F

17/F

LB

UB

G/F

1/F

2/F

3/F

4/F

G/F

1/F

2/F

3/F

4/F

5/F

line of topographic surface

28

Page 15: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  15 

30

Page 16: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  16 

31

Spatial data Spatial data consideration : - Could we have free data accessible on web?

- Could we have aerial photos, terrestrial photos, or even specific photos of the tree?

- Could we have the law and regulation information accessible?

- Land Object concept in Cadastre 2014

Who is responsible? 

Intuitively,  infrastructure should be provided by the Government.   

 

Technically, the stakeholders: 

• Spatial data suppliers / owners / custodian 

• Users 

• Integrators 

 

32 

Page 17: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  17 

Model 1 – Supplier‐User Uni‐directional Relation 

33 

Supplier

User 1

User 2

User 3

Digital mapping products in the early 1990’s

Model 2 – Supplier‐User Bi‐directional Relations 

34 

Supplier

User 1

User 2

User 3

Digital mapping products in the late 1990’s feedbacks and updates

Page 18: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  18 

Model 3 – Multi‐Suppliers & Users Networking Relations 

35 

Supplier

User 1

User 2

User 3

Supplier A

Supplier B

Supplier C

User 1

User 2

User 3

Multiple suppliers Different formats

User modifies data

Model 4 – Owner‐Distributor‐User Tripartite Relations 

36 

Integrator

Custodian 1 Owner 2 Owner 3

User 1

User 2

User 3

Integrator coordinates various sets of data & distributes them to users

Page 19: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  19 

The Way Forward 

A SDI policy which unites:  

 Government organizations, Data custodians, Policy makers, Professional bodies, Academics 

• Intrasectoral development 

• copyright and legal issues 

• location privacy 

• institutional reorganization 

• education, research & development 

  37 

Position of spatial data within overall IT strategy 

 

• Intrasectoral development 

• copyright and legal issues 

• location privacy 

• institutional reorganization 

• education, research & development 

 

38 

Page 20: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  20 

Position of spatial data within overall IT strategy 

‐ 5D   Spatial Data 

• DOM /TDOM  True Digital Ortho Map 

• DEM    Digital Elevation Model 

• DSM    Digital Surface Model 

• DLG    Digital Line Graphic 

• DRG    Digital Raster Graphic 

39 

40 

Page 21: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  21 

Web 2.0

Distributed Collaboration

GIS on the Web The Web is the New Platform

• Many Authors & Publishers

• Lots of Communities – Interconnected – Interoperable

– Integrative – Dynamic

Mapping & Visualization

Web GIS

Page 22: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  22 

43

Mobile Mapping

Google Earth 3D Platform

GIS

Web Based GIS

Ways to Process Spatial Data

3D GIS Platform

Future SDI in HK

Page 23: ts03b tang lam ppt 4175 - FIGLesly LAM Thank You! leslylam@hkis.org.hk Conrad Tang lstang@polyu.edu.hk Title Microsoft PowerPoint - ts03b_tang_lam_ppt_4175 Author Louise Friis-Hansen

FIG Congress 2010 Facing the Challenges – Building the Capacity Sydney, Australia, 11‐16 April 2010  23 

45

Thank You! Lesly LAM [email protected] 

 Conrad Tang 

[email protected]