A good book review by Ali Muhammad Rizvi of Stuart Elden's Mapping the Present: Heidegger, Foucault and the Project of a Spatial History.

Elden's text explores the relationship between Heidegger and Foucault in terms of the way they reconceptualise space and time in wholly non-Cartesian terms. Rizvi says that it has been argued since the eruption of the so-called modernity/postmodernity debate that:

...while modernity consisted in giving priority to time over space, postmodernism reverses this by giving priority to space over time. Elden convincingly dismisses such naive binary oppositions. It is not simply the question of giving priority to space over time. What defines the new way of thinking inaugurated by Heidegger, and carried to new peaks by Foucault, is the question of conceptualising space and time anew and to think of them not exclusively but in relational terms. The new way of thinking inaugurated by Heidegger is relational through and through .... This leads us, according to Elden, to a new conception of history, which is no longer to be seen as an assemblage of events in linear sequence but as spatialised history, a history which uses space not merely as an object of analysis but rather as a tool of historical analysis. While Heidegger confined himself to the reconceptualisation of space and time and their new relation through engaging with thinkers from past and present, Foucault actually wrote spatial histories.

The notion of Augenblick (and the related Einblick) is important for Elden’s strategy for finding a fundamental (primordial?) link that relates Heidegger to Foucault. Through this crucial Heideggerian notion Elden points towards the notion of time as the moment "where future and past collide in the present, as the temporality of the moment" ... According to Elden the Heideggerian notion of time as Augenblick can be linked to Foucault’s history of the present. In two ways at least. The notion of Augenblick portrays time in terms of the moment, now and here (the present) and not in terms of past or future. Of course the 'now' here is a richer 'now' than the ordinary 'now' in the sense that it 'contains' in it both the past and the future in the same fashion in which the notion of 'present' is now reconceptualised to incorporate both past and future...The second reason is that the notion of 'moment' also points towards the spatial side of the present, what Elden calls "the double meaning of present, the temporal and spatial signifier". Thus, according to Elden, because Heidegger reconceptualises the notion of time as 'the moment', i.e. as the present in both a temporal and spatial sense, he paves the way for the Foucauldian notion of the history of the present as the history of the 'now and here'.