Cartography of archaeoastronomical techniques in the Calçoene equinoctial cromlech

The AP-CA-18 archaeological site of Calçoene, located in the northern Brazilian Amazon, has a megalithic arrangement shape an irregular circle, constituting cromlech with menhirs azimuths and well-defined zenith angles. From perspective current academic astronomy, it prints strict relationship observation astronomical events, notably equinoxes solstices. Without intending to interfere anthropological studies social group that built it, this work, based on cartography support geotechnologies, analyzed shapes, layout, orientation alignment their events. Data treatment adjustments image generation were performed GIS. Based analyses, was possible establish between spatial techniques such as projection sunlight/shadow ray absence shadow for confirmation work presents images identification, characterization classification events from astronomy.