Approaches to Determine and Represent Geographical Units ...ggim.un.org/ggim_20171012/docs/meetings/International workshop/… · Badulla District Ampara District 80°30'0"E 80°40'0"E

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Approaches to Determine and Represent Geographical Units, Including Geocoding, for Statistics

Presenter: Sisira Tennakoon.

BSc.(Hons.), HDC(Syr.), MSc.(GeoInfomatics)

Deputy Surveyor General – Survey

Department of Sri Lanka.

Area: 65,610 Sq.Km

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Survey Act The Surveyor General has been empowered by

Survey Act No.17 of 2002 - article 2(k) to

– Receive, Store, Reproduce and Distribute

Topographic, Cadastral and Derived maps, Remote sensed data, Aerial photographs and other surveying and mapping documents.

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Local Grid Reference of Sri Lanka

200 km

200 km

500 km

500 km

Pidurutalagala Trig Stn.

• Every country has its own local grid reference for measurement of distances and to show the directions.

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Foundation Data

Surv

ey

Dep

artm

ent

Co-

oper

ate

Inst

itutio

ns

Taxing

Utilities

Buildings

Valuation

Planning

GIS Applications

Cadastral Mapping

NSDI -Sri Lanka

Geodetic Network

Topographic Mapping

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1:250,000• 4 sections• All Sheets in Digital Form

1:50,000• 92 Sheets• All Sheets in Digital Form

1:10,000• 1834 Sheets• 1583 - 10K Sheets in Digital Form

Topographical Maps

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Digital Topographic Database

GIS - TopoDB

1K

50K10K

Dataset 1 :Data available for Entire CountryDataset 2: New series from ALOS Satellite Images Sheet No. 1- 39

Data available for 86 % of the Country

Colombo Metropolitan Area Only

250KData available for Entire Country

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10K National Coverage

AD_GN_Pg (GN Level boundary)

CO_Building_Pg (Buildings) CA_Grid_Li (Cartographic Grids)

HY_Hydro_Li/Pg (Streams, Tanks)

TR_Transport_Li (Roads, Railroad)

LU_Landuse_Pg (Vegetation)

CO_Toponomy_Pt (Place Names)

TE_Terrain_Li/Pt (Contour, Spot Heights)

UT_Utility_Li/Pt (High Tension Power Line)

RS_Reserves_Pg (Natural Reserves)

Data Layers

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10K National Coverage

•In Esri ArcGIS GeodatabaseFormat.

•Tile Based Dataset (Not Seamless).

•Metadata for each Tile.

•Converts into DXF or Shapes on request.

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Lineage - MetadataSHEET NO: 2107

DATA SOURCE: Aerial Photograph/Satellite Image Color Aerial Photograph

Year of Photography/Satellite Image 2010 & 2011

Scale of Photography/Resolution 1:20000

Method of Data CollectionStereo Compilation

Year of Compilation 2013

Field Checked 2013

Database Completed 2014

Sheet Covered by(Coordinate) Xmin 168000Y Min 390000X Max 176000Y Max 395000

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GFCODEUnique in the Database (5 Alphabetic Characters)•1-4 Chars : represent the feature•5th Char: represent the feature type

• P -Point• L - Line• A - Area• V – Virtual

Eg. MNRDL – Main RoadsMRBRL – Main Road on Bridge

MNRDL

MRBRL

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Data Validation : OpenStreet Map with ArcGIS

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Compare with Google Earth Satellite Images

GIS Activities in the Survey Department13

School LocationsApprox. 9500 Hospital LocationsApprox. 1100 ToponomyApprox. 32,573

Sri Lanka – Other Data

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Sri Lanka – Administrative DivisionsProvince : 9(Largest Admin Unit)

District : 25(Sub Division of Province)

DS Division : 331(Divisional Secretariat DivisionMain Public Administrative Unit)

GN Division : 14,021(Grama Niladari Division.Sub Divisions of DS DivisionSmallest Administrative Unit)

Local Authority : 335(Local Revenue AuthoritiesPradesiya Saba, Urban Council and Municipal Council)

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GN- Division Data– Smallest Admin. Units

14,021 Units cover the whole Island

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GN Division Data with Geo Coding

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GN Division with Population

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Parcel Base Land Information System.

Parcel DB completed - 15 D.S.Div. Field Survey CommencedIn 75-D.S.Div.

Planning to Expedite LIS throughe-Land Hub

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Parcel Base Land Information System.

Moratuwa DS Division 48,500 Land Parcels.

12-Digits National ID for each Land Parcel

Parcel Information

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Population Density

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Population Density

Illustration of nested Administrative Hierarchy of Sri Lanaka

2323

2424

Detail Map

Common platform for decision making

Statistical data

Spatial data

Integrated data

Common Geocodes

Maps

Tables

Reports

EvidenceBaseDecisionsFor economical, Social and environmental development

Graphs

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5911,696(19)

5781,708(18)

5891,560(22)

5791,188(28)

5833,813

(1)

5881,655(21)

577827(33)

576735(35)

573790(34)

5861,309(23)

5802,085(11)

5741,135(30)

5901,686(20)

5841,294(25) 575

1,308(24)

5811,260(26)

5821,048(31)

5681,210(27)

5712,109

(9)

5602,341

(6)559

2,165(8)

5871,148(29)

5931,998(14)

5642,543

(5)

5921,881(15)

5653,430

(2)

5692,011(12)

5672,106(10)

5613,173

(3)

5662,217

(7)

5901,686(20)

5721,754(17)

5851,005(32)

5633,106

(4)

5702,009(13)

5621,839(16)

Pujapitiya DS Division

Pathadumbara DS Division

Harispattuwa DS Division

Matale District

80°39'0"E80°37'30"E80°36'0"E

7°25

'30"

N7°

24'0

"N7°

22'3

0"N

7°21

'0"N

Location Details

Map: P4.21.09.1 Population by GN Division - Akurana DS Division, Kandy District - 2012

0 0.4 0.80.2 Kilometers

Legend

BoundariesDistrict

DS Division

GN Division

Population735 - 1,0051,006 - 1,309

1,310 - 1,8811,882 - 2,217

2,218 - 2,543

2,544 - 3,813 Data Source: Preliminary Results of Census of Population and Housing - 2012.

:

Notes:*1, 1A, 1B, ...45, 45A,45B ... 325, 325A, ... : Denotes the GN Division Number (Refer Annex for relevant GN Division Name)

** 9,999 Indicates the Population of the GN Division

*** (1), (2), ... (35), (36) ... (126), (127) ... : Indicates the GN Division rank according to the Population size (least number for highest Population)

Prepared by: Cartography Division, Department of Census & Statistics.

Nagoda DS Division

Niyagama DS Division

Matara District

Kalutara District

Ratnapura District

225B

226

225

228

229E

230B

230D

229G

229B

226C

224A

230C

228F

224

229C

226B

227B

227

230

225A

226A

229F

230E

228A

230A

229

225C

228G

228D

227C

229D

227A

229A

228C

228B

228E

80°24'0"E80°21'0"E80°18'0"E

6°24

'0"N

6°21

'0"N

6°18

'0"N

6°15

'0"N

Location Details

Map: P4.31.18.3 Population by Age Group (less than 15 years, 15 to 59 years, 60 years and over) and Dependency Ratio by GN Division - ThawalamaDS Division, Galle District, 2012

0 1 20.5 Kilometers

LegendBoundaries

District

DS Division

GN Division

Age Group (%) *0.33

Less than 15 years15 - 59 years60 years and over

Dependency Ratio **41.9 - 52.953.0 - 59.359.4 - 63.063.1 - 65.065.1 - 68.568.6 - 72.8

Data Source: Preliminary Results of Census of Population and Housing - 2012.Prepared by: Cartography Division, Department of Census & Statistics.

:

Notes: * Age Group (%) indicate the percentage distribution of population by age (less than 15 years, 15 to 59 years & 60 years and over ) within the GN Division.

** Dependency Ratio = (persons Aged below 15 years and above 59 years / Persons Aged 15 to 59 years) * 100

*** 1, 1A, 1B, ...45, 45A,45B ... 325, 325A, ... : Denotes the GN Division Number (Refer Annex for relevant GN Division Name)

Neluwa DS Division

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Ampara

Anuradhapura

Moneragala

Kurunegala

Badulla

Puttalam

Ratnapura

Galle

Matale

Kandy

Mullaitivu

Polonnaruwa

Mannar

Batticaloa

Kegalle

Trincomalee

Hambantota

Vavuniya

Kalutara

Matara

Gampaha

Jaffna

Nuwara Eliya

Kilinochchi

Colombo

Mannar

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82°0'0"E81°0'0"E80°0'0"E

10°0

'0"N

9°0'

0"N

8°0'

0"N

7°0'

0"N

6°0'

0"N

:Legend

District Boundary

Population Density

( Persons per Sq.Km.)

31 - 60

61 - 200

201 - 600

601 - 1,000

1,001 - 2,000

2,001 - 4,000

I n d i a n O c e a n

Populat ion  Densi ty  by  Distr i c t ,  2012

0 20 40 6010 Kilometers

Ampara

Anuradhapura

Moneragala

Kurunegala

Badulla

Puttalam

Ratnapura

Galle

Matale

Kandy

Mullaitivu

Polonnaruwa

Mannar

Batticaloa

Kegalle

Trincomalee

Hambantota

Vavuniya

Kalutara

Matara

Gampaha

Jaffna

Nuwara Eliya

Kilinochchi

Colombo

Mannar

( 3 )

( 11 )

( 17 )

( 4 )

( 13 )

( 6 )

( 2 )

( 5 )

( 14 )

( 18 )

( 10 )

( 7 )( 1 )

( 23 )( 16 )

( 24 )

( 21 )

( 22 )

( 15 )

( 19 )

( 8 )

( 12 )

( 20 )

( 9 )

( 25 )

82°0'0"E81°0'0"E80°0'0"E

10°0

'0"N

9°0'

0"N

8°0'

0"N

7°0'

0"N

6°0'

0"N

:Legend

District Boundary

Sex (%) *

590,000

Male

Female

Sex Ratio( Males per 100 Females )

88.1 - 90

90.1 - 92

92.1 - 94

94.1 - 96

96.1 - 98

98.1 - 100

100.1 - 102

I n d i a n O c e a n

( 1 ), ( 2 ),...........( 25 ),Indicates the DistrictRank of Sex-Ratio(least number forhighest Percentage)

Populat ion  by  Sex  and  Sex  Rat io  by  Dist r i c t ,  2012

* Note:Sex (%): Indicates thepercentage distributionof population by sex,within the District

0 20 40 6010 Kilometers

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Naula

Matale

Ambana

Lenawa

Ukuwela

Rattota

Nalanda

Kibissa

Senagama

Dambulla

Guruwela Oggomuwa

Dunuwila

Talagoda

Ridiella

Elkaduwa

Weragama

Dankanda

Pussella

Mahawela

Madawala

Opalgala

Madipola

LenadoraGalewela

Gonawela

Sigiriya

Pallegama

Wilgomuwa

Kaluganga

Elagomuwa

Pubbiliya

Ankumbura

Aluvihare Kaikawala

Dombawala

Yatawatta

Paldeniya

Gammaduwa

Millawana

Wahakotte

Waralanda

Pelwehera

InamalawaEtorahena

Pallegama

Viharagama

Uduwelwala

Dambagolla

Gurubabila

Akuramboda

Hewanewela

Nikawehera

Bulanewewa

Pubbarawela

Radunnewela

Yodagannawa

Medapihilla

Kandanuwara

Palapatwela

Kohalanwela

Kongahawela

Walakumbura

Beliyakanda

PanampitiyaNayakombura

Yakkuragala

Talakolawela

Dammanatenna

Diganpathaha

Karagahatenna Himbiliyakada

Kathurupitiya

Pilihudugolla

Tittawelgolla

Gedigaswelana

Makulugaswewa

Kapuruwediwela

Talakiriyagama

Weliwaranagolla

Ratmalagaha ElaDandubendiruppa

Siyambalagaswewa

Mirisgoni Oya Junction

Dambulla PS

Naula PS

Laggala-Pallegama PS

Wilgamuwa PS

Galewela PS

Rattota PS

Ukuwela PS

Pallepola PS

Matale PS

Yatawatta PS

Dambulla MC

Ambanganga Korale PS

Matale MCMatale PS

Naula

Dambulla

Wilgamuwa

Galewela

Laggala-Pallegama

Rattota

Matale

Ukuwela

Pallepola

Yatawatta

Ambanganga Korale

Polonnaruwa District

Kandy District

Kurunegala District

Anuradhapura District

Badulla District

Ampara District

81°0'0"E80°50'0"E80°40'0"E80°30'0"E

8°0'

0"N

7°50

'0"N

7°40

'0"N

7°30

'0"N

Location Details

Map: P3.22.1.4 Distribution of Population Density - Matale District, 2012

0 5 102.5 Kilometers

Legend" District Secretariat" Divisional Secretariat") Town

Major Road

Railway

BoundariesDistrict

DS Division

Local Authority Data Source: Preliminary Results of Census of Population and Housing - 2012.

Prepared by: Cartography Division, Department of Census and Statistics.

:

Population(Persons per Sq.Km.)

0 - 132

133 - 369

370 - 737

738 - 1,475

1,476 - 2,607

2,608 - 4,240

4,241 - 6,715

Distribution of Population Density- District Level

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Current Status - 1:1,000 Topo Database

Construction (CO) CO_Building_PtCO_Building_Pg

Hydro (HY) HY_Hydro_PtHY_Hydro_LiHY_Hydro_Pg

Landuse (LU) LU_Landuse_PtLU_Landuse_PgLU_Reserves_Pg

Terrain (TE) TE_Terrain_PtTE_Terrain_Li

Transport (TR) TR_Transport_PtTR_Transport_LiTR_Transport_Segment

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1K Data – Colombo Metropolitan Area.

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Future endeavors.

•Implement a NSDI (National Spatial Data Infrastructure)

•Introduce fast map updating system.

•Transform Tile base Database to a Seamless one.

•Providing Foundation Data in Open Standards.

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