Land-use dynamics at the micro level: constructing and analyzing historical datasets for the Portuguese census tracts António Manuel Rodrigues, Teresa Santos, Raquel de Deus, Dulce

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Land-use dynamics at the micro level: constructing and analyzinghistorical datasets for the Portuguese census tracts

António M. Rodrigues -Teresa Santos - Dulce Pimentel - RaquelFaria de Deus

Objectives

Build and demonstrate the potential of micro-datahistorical census datasets

Why?

Because it hasn’t been done before!

Problem

Non-compatible geographical datasets

So?

Impossible to trace changes at the lowest dataaggregation level

Small-area / census tracts datasets

• Lowest level of aggregation for official data.

• Unique and indispensable information for the definition of public developmentpolicies and for decision-making as regards investment by the public and pri-vate sectors.

• Consistent grouping in terms of tabulation data and microdata available (6 setsof tables)

Geographical information for small areas: strengths and some weaknesses.

Small-area / census tracts datasets

Small-area / census tracts datasets

Small-area / census tracts datasets

Small-area / census tracts datasets

Small-area / census tracts datasets

(D)Asymmetric mapping using control units

(Re-)introducing Geography

Some important theoretical issues...

Specifics of lattice data

Form - Structure - Function

Land-use - Land Cover

Specifics of lattice data

Ecological fallacyModifiable Areal Unit Problem (MAUP)

Typological issues

Small-area / census tracts datasets

Looking at large numbers...

Portugal Continental

Variáveis 1991 2001 % 2011 %População residente 9375926 9869343 5.3 10047083 1.8Alojamentos (total) 4018669 4858788 20.9 5626804 15.8Edifícios 2712866 2997659 10.5 3352829 11.8Famílias clássicas 3018089 3505292 16.1 3869537 10.4

Some results...

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Concluding remarks

Research funded by the "Fundação para a Ciência e Tecnologia".