ecuador ipums dublin workshop - Minnesota Population Centerusers.pop.umn.edu/~rmccaa/ipums-global/ecuador_ipums_dublin_workshop.pdfEcuador Julio 1Ortega , 2Carlos F. 3Mena2, Carolina

IPUMS DUBLINECUADORA t 20August, 20

Julio Ortega A.j t @ f djortega@usfq.edu.ec

Automated Process for theAutomated Process for the generation of Integrated 

Geographical Units Series IGUS in EcuadorEcuador

Julio Ortega1, Carlos F. Mena2, Carolina Sampedro2, Francisco Yuigra3

1Centro de Estudios de la Población, Universidad San Francisco de Quito2Galapagos Science Center, Universidad San Francisco de Quito

3 C lt I d di t3 Consultor Independiente

IntroductionIntroduction 

• The proposal of IPUMS is to start with the• The proposal of IPUMS is to start with themost recent avalaible census year (2001), tocreate geographic units of 20K populationcreate geographic units of 20K population. Those units are called IGUS IntegratedGeographic Units SeriesGeographic Units Series. 

• We separate the procces in two parts:1. Scattered or rural area2. Urban area

World MapWorld Map

Map of SouthamericaMap of Southamerica

GEOGRAPHICAL COVERAGE OF POPULATION AND HOUSING CENSUS IN 2001

Research 

HOUSING CENSUS IN 2001

Universe:

Population and housing throughout the country:

22 Provinces216 counties774 rural parishes

ADMINISTRATIVE POLITICAL DIVISION

Natural  ProvincesRegions

Provinces

CountieshParishes

MANABI

CENSUS DIVISIONCENSUS DIVISION

• CENSUS SECTORSCENSUS SECTORS• CENSUS ZONES

S S• PARISHES• COUNTIES• PROVINCES• NATURAL REGIONSNATURAL REGIONS • COUNTRY

SCATTERED OR RURAL UNITS CENSUS

SCATTERED ZONES SCATTERED SECTORS

URBAN CENSUS UNITSURBAN ZONES URBAN SECTORS

Basic ProcessBasic Process

• Step 1: Identification of Sectors with highestStep 1: Identification of Sectors with highestnumber of people *seeds* 

• Step 2: Define adjacent Sectors within GISStep 2: Define adjacent Sectors within GIS• Step 3: Merge to the seed with an adjacent  sector with smaller population to create a newsector with smaller population to create a new larger sector. 

• Repeat the process until the new sectorRepeat the process until the new sector achieve a total population of less than 20,000 inhabitants. 

1. Scattered area(Rural area)1. Scattered area(Rural area) 

• For the scattered area we first used theFor the scattered area we first used the political and administrative division at the parish, ie the lowest geographical level  were  parishes. We made the corresponding exercise with census zones and census sectors  without bi ib i fa big contribution so we prefer to use 

parishes. W h h IGUS f h d l• We show  the IGUS for the scattered or rural area.

Census Sector

Process: The grouping of census sectors

Searching for “remnant sectors” that d t d 20k i h bit tdo not exceed 20k inhabitants

The Final Result: IGUs at the National Level

Optional Process: AdjustmentOptional Process: Adjustment

Minimum number of people that can support an IGUs – In Percent 

Maximum number of people that can support an IGUs – In Percent 

Activate AdjusmentProcess

Adjustment

Adjustment

2. Urban area2. Urban area 

• For the urban area or block area due to theirFor the urban area or block area,  due to their geographical density it was not possible to use parishes so it was used census sectors as unitsparishes so it was used census sectors as units of the lowest geographical level.

• We show the result of IGUS for the urban area• We show the result of IGUS for the urban area of principal cities from Ecuador.

Urban Census Sectors (Guayaquil)( y q )

IGUS Guayaquil

IGUS Quito

IGUS Cuenca

ConclusionConclusion• For rural areas, despite the existence of lower geographic 

levels (census zones and census sectors) was enough to use parishes to use the DPA. But when building IGUS not necessarily all the parishes belong to the same canton.

The use of parishes as lower geographical units affects  when creating new parishes because it should mend IGUS according to these creationsaccording to these creations.

For the urban areas,  census sectors were used due to its high population density, and in the case of the way ofhigh population density, and in the case of  the way of construction, not necessarily all of the IGUS census sectors, belongs to the same census zone.