USE OF AERIAL FRAMES

FOR AGRICULTURAL

CENSUSES AND SURVEYS

Fiji Experience

INTRODUCTION

Aerial Frame methodology was introduced in Fiji Aerial Frame methodology was introduced in Fiji during the last 1991 agriculture census project.during the last 1991 agriculture census project.

It was an alternative methodology given that It was an alternative methodology given that there were a lot of errors in the proposed there were a lot of errors in the proposed methodology as previously used in the 1978 methodology as previously used in the 1978 census i.e. List and cluster sampling census i.e. List and cluster sampling methodology. (errors in overlapping / methodology. (errors in overlapping / duplication and omissions)duplication and omissions)

AREA FRAME PROCEDURES FOR 1991 AGRICULTURE CENSUS

Divided the whole country into small blocks Divided the whole country into small blocks without any overlapping and omission that without any overlapping and omission that have identifiable physical featureshave identifiable physical features

Overlayed the Population Census EA Overlayed the Population Census EA boundariesboundaries

Stratification of EA boundaries into nine Stratification of EA boundaries into nine strata according to the importance, intensity strata according to the importance, intensity and type of land use and type of land use

Further, the whole country was sub divided Further, the whole country was sub divided in to 21 sub-stratas. This activity guaranteed in to 21 sub-stratas. This activity guaranteed the sample allocation between crops. the sample allocation between crops.

STRATIFICATION STRATIFICATION SUMMARYSUMMARY

Nine Stratas– Strata 10: 70 -100% Cultivation– Strata 20: 30 - 69% Cultivation– Strata 30: 10 – 29% Cultivation– Strata 40: 91 – 100% Pastures– Strata 50: 100% Forests [No Census]– Strata 60: 100% Non Agriculture land [No Census]– Strata 70: 100% Cities & Towns [No Census]– Strata 80: 100% Special Farms – Strata 90: 100% Big agriculture holdings [freeholds

etc]

PREPARATION OF AREA FRAME

Transferred all EA boundaries on to topo maps

Manually stratified the EAs on topo maps including sub-stratification procedures

Numbering of grid boxes on stratified EA maps on a serpentine manner

Randomly selected the 1294 samples Manually transfer the selected segments boundaries on to

contact aerial photo following identifiable physical features with no disturbance to the area of segment

Used planimeter to calculate the area of segment on aerial photo

Prepared photo enlargements with all corresponding details laminated properly before sending to the field.

ACTIVITIES UNDERTAKEN

Pilot Census conducted whereby all amendments were incorporated in the final version of survey instruments

Selected 1294 SMs [photo enalrgements] as final sample for census

Conducted two separate trainings; Supervisors [2wks] & Enumerators [2wks]

Two months of Data collection [Jun-Jul] Conducted 7 months of data processing using SAS

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