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Intertidal ecosystems have primarily been studied using field-based sampling; remote sensing offers the ability to collect data over largeareas in a snapshot of time which could compliment field-based sampling methods by extrapolating them into the wider spatial andtemporal context. Conventional remote sensing tools (such as satellite and aircraft imaging) provide data at relatively course, sub-meterresolutions or with limited temporal resolutions and relatively high costs for small-scale environmental science and ecology studies. Inthis paper, we describe a low-cost, kite-based imaging system and photogrammetric pipeline that was developed for constructing highresolution,3D, photo-realistic terrain models of intertidal rocky shores. The processing pipeline uses automatic image feature detectionand matching, structure-from-motion and photo-textured terrain surface reconstruction algorithms that require minimal human inputand only a small number of ground control points and allow the use of cheap, consumer-grade digital cameras. The resulting mapscombine colour and topographic information at sub-centimeter resolutions over an area of approximately 100m, thus enabling spatialproperties of the intertidal environment to be determined across a hierarchy of spatial scales. Results of the system are presented foran intertidal rock platform at Cape Banks, Sydney, Australia. Potential uses of this technique include mapping of plant (micro- andmacro-algae) and animal (e.g. gastropods) assemblages at multiple spatial and temporal scales

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

LOW-COST, ULTRA-HIGH SPATIAL AND TEMPORAL RESOLUTION MAPPING OF INTERTIDAL ROCK PLATFORMS