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Archaeological maps: methods and techniques for territorial analysis

Leonor Rocha et Gertrudes Branco
p. 141-142

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1Archaeological maps are, by definition, a tool for the management of the cultural heritage, planning and urban development, and are drawn up on the basis of existing studies and recent fieldwork, covering all the latest data.

2In Portugal, the idea of creating a national archaeological map was developed, for the first time, in the 1970s. However, several attempts to organize such amount of information have been offset by two major problems: the difficulty of mapping such a large area, and the lack of available funding to carry it out. As a result, the only archaeological maps that have been made are those covering local districts, or counties,funded by local authorities that have opted to invest in this area because of the number and importance of heritage sites known in its territory; only around fifty local councils have such maps.

3In the late 20th century, the Instituto Português de Arqueologia (Portuguese Archaeological Institute), the institution responsible for supervising archaeological works in Portugal, under the Culture Ministry, set up a national database, Endovelico. Despite progress on the database having completely ground to a halt, it covers around 26,000 archaeological sites and constitutes an important source of archaeological information in Portugal.

4While the main purpose of archaeological field survey is to gather knowledge about a territory, verifying the existence or otherwise of archaeological sites within a given space (Ferreruela Gonzalvo, 2001-2202), the recognition of its importance is due firstly to the emphasis on territorial and spatial archaeology brought about by the “New Archaeology” and secondly to the increased importance of archaeological surveys carried out as part of large-scale public and private development projects with the need for areas to be assessed for the purpose of protection.

5The methodologies used in archaeological field surveys vary from the systematic to the selective, depending on the objectives involved. Because field survey is a non-destructive method of research it can be less rigid (than, for instance, excavation work) and applied in a flexible strategy, during its execution, as more specific information about the territory is being gathered; field survey work is usually informed by the analysis of existing studies, toponyms, maps, aerial photographs and geological data.

6Nowadays, archaeologic surveyors face an increasing number of difficulties, as examples: agricultural machinery can disturb or destroy evidence of ancient landscapes; the strong impact on the landscape, and unexcavated heritage, caused by the building of infrastructures (for example, dams, roads and buildings); on the other side, traditional information about the territory is continually being lost as the older generation of rural people, with strong ties to the land and cultural traditions, and an excellent knowledge of the local area, is passing away, implying the loss of a very important source of oral information.

7The experience of a team of field surveyors is of utmost importance; the lack of such experience, coupled with poor knowledge of the local area, can result in insufficient results. In fact, from the analysis of the archaeological maps available in Portugal, most of them made in the 20th century (see map and chart), it is evident that the obtained results were determined by the experience of archaeologists involved in field work.

Figure 1: Evolution in Archaeological Maps (Portugal).

Figure 1: Evolution in Archaeological Maps (Portugal).

Figure 2: Prospecting register.

Figure 2: Prospecting register.

8At the moment we are able to say that archaeological maps in Portugal, as a generalized procedure of gathering information about archaeological heritage and produce inventories to be used in urban and land planning, is not yet standard practice and still needs refinement regarding methods and theories involved. This work aims to be a contribution to this theme.

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Table des illustrations

Titre Figure 1: Evolution in Archaeological Maps (Portugal).
Fichier image/jpeg, 268k
Titre Figure 2: Prospecting register.
Fichier image/png, 18k
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Référence papier

Leonor Rocha et Gertrudes Branco, « Archaeological maps: methods and techniques for territorial analysis », ArcheoSciences, 33 (suppl.) | 2009, 141-142.

Référence électronique

Leonor Rocha et Gertrudes Branco, « Archaeological maps: methods and techniques for territorial analysis », ArcheoSciences [En ligne], 33 (suppl.) | 2009, mis en ligne le 30 octobre 2011, consulté le 22 mars 2017. URL : ; DOI : 10.4000/archeosciences.1461

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Leonor Rocha

CIDEHUS/ Universidade de Évora (

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Gertrudes Branco

Universidade de Évora (

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