groma

How to use the Roman groma

How to use the Roman groma

In the building of a Castra, after having flattened the ground and before starting the ditch and wall construction, an agrimensor (land surveyor) drew the locations of the streets and of the wall, beginning from the center of the field, using the groma. It follows the description of this topographical tool and its use. The original and full version was writed by Edilio Boccalieri, and it is available here.

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