CENSUS MAPPING – THE PHILIPPINE EXPERIENCE Vincent Olaivar National Statistics Office Philippines

The Philippines 7,100 island7,100 island 287,564 sq. km.287,564 sq. km. 17 Regions17 Regions 81 Provinces81 Provinces 1,500 municipalities1,500 municipalities about 42,000 Barangaysabout 42,000 Barangays about 64,000 Enumeration Areas (EAs)about 64,000 Enumeration Areas (EAs) Background

EA determination/delineation Background Factors considered: Population size of barangay Population size of barangay Duration of census operation Duration of census operation

Mapping Unit Mapping standards group  Sets standards for preparing maps and Geographic Codes  Conducts map inventory  Evaluates base maps Cartography group  Constructs maps based on mapping standards  Prepares enumeration area (EA) maps Map reproduction group  Reproduces maps that will be used in census enumeration and supervision Background

The NSO Mapping Unit 21 permanent personnel21 permanent personnel 10 personnel involved in GIS mapping10 personnel involved in GIS mapping Over 1,000 personnel hired during pre-census mappingOver 1,000 personnel hired during pre-census mapping Manifold softwareManifold software 37 GPS units37 GPS units Background

Census Experience Digitized Aerial Maps Digitized Aerial Maps Used topograhic aerial photographyUsed topograhic aerial photography Piloted in Metro ManilaPiloted in Metro Manila Contracted by a domestic and private corporationContracted by a domestic and private corporation January to September 2000January to September 2000

2000 Census Experience Problems Encountered (maps using aerial photography) Problems Encountered (maps using aerial photography) Maps not delivered on timeMaps not delivered on time Delineation/Demarcation not accurateDelineation/Demarcation not accurate Lack detailed street names and landmarksLack detailed street names and landmarks

2000 Census Experience Problems Encountered (sketch map-based) Problems Encountered (sketch map-based) Base maps used are not very accurateBase maps used are not very accurate Most have only the boundaries digitizedMost have only the boundaries digitized Those with street patterns and landmarks are not very accurateThose with street patterns and landmarks are not very accurate

Census Experience Satellite Image Maps Satellite Image Maps Used available Google Earth satellite imagesUsed available Google Earth satellite images Converted some of these images into GIS maps using ManifoldConverted some of these images into GIS maps using Manifold

2007 Census Experience Problems Encountered (Satellite image maps) Problems Encountered (Satellite image maps) Google Earth map images not available in most of the rural areasGoogle Earth map images not available in most of the rural areas Some images are cloud- blurredSome images are cloud- blurred

Census Experience GPS hand-held devices GPS hand-held devices Did some studies/ comparison on GPS and GIS positional accuracy and consistencyDid some studies/ comparison on GPS and GIS positional accuracy and consistency Sketch maps update (incl. land mark identification and road tracking)Sketch maps update (incl. land mark identification and road tracking)

2007 Census Experience Problems Encountered Problems Encountered (GPS hand-held devices) Number of units not enough to update all sketch mapsNumber of units not enough to update all sketch maps Weather dependentWeather dependent ExpensiveExpensive Field-work intensiveField-work intensive

2010 Census Plans  Avail more GPS unit  Maximize use of satellite images since these images are quite accurate  Use of GPS in updating sketch map-based GIS maps  Use of GIS maps in pre- enumeration and enumeration activities  Capitalize on GIS development

2010 Census Plans  Capitalize on GIS development in the Local Government Units

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