Ethnomapping, an increasingly common tool in Indigenous environmental and territorial management projects, is presented by public policies and their consultants as essential for intercultural dialogue about landscape, its cultural uses, as well as the environmental threats and impacts that affect the traditional ways of living. By combining ethnographic surveys and archival study about the Xikrin Indians of the Indigenous Land of Trincheira Bacajá (Pará, Brazil), this chapter proposes to question the notion of landscape as heritage and to demonstrate how the heritage governance of the landscape is rooted in the demarcation process. The text will analyse what happens when landscape is translated into a form outside its own materiality using mapping tools and to what extent do these tools allow the emergence of alternative meanings of landscape. Finally, we will observe what heritage-making in the ethnomapping process says about the relationship between Indigenous communities and the dominant society and how ethnomethodology can overcome the limits of ethnomapping.