XXII ISPRS Congress 2012: Technical Commission VIII

Shortis, M.; Shimoda, H.; Cho, K.

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Multivolume work

Persistent identifier:: 1663813779

Title:: XXII ISPRS Congress 2012

Sub title:: Melbourne, Australia, 25 August-1 September 2012

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663813779

Language:: English

Additional Notes:: Kongress-Thema: Imaging a sustainable future

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1663822514

Title:: Technical Commission VIII

Scope:: 590 Seiten

Year of publication:: 2014

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663822514

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(39,B8)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist ermittelt.; Literaturangaben

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Shortis, M.; Shimoda, H.; Cho, K.

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [VIII/6: Agriculture, Ecosystems and Bio-Diversity]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: LOW-COST, ULTRA-HIGH SPATIAL AND TEMPORAL RESOLUTION MAPPING OF INTERTIDAL ROCK PLATFORMS Mitch Bryson, Matthew Johnson-Roberson and Richard Murphy

Document type:: Multivolume work

Structure type:: Chapter

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B8, 2012 XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia (c) 50cm mm Figure 5: 3D Photo-textured Reconstruction of an Intertidal Rockflat: (a) 3D oblique view of the rock platform, (b) medium-level zoom oblique view of rock platform section, (c) full-zoom overhead view of individual rockpool. The level-of-detail visualisation system allows for different model scales to be visualised in a single, continuous terrain model. Boulder Field ES Rack Pools n T Lure Cliff Edge X ^ Sa: Figure 6: 3D Photo-textured Reconstruction of an Intertidal Rockflat: Perspective view from the southern end of the 3D ter- rain reconstruction with annotations illustrating landscape fea- tures/habitat types at the site. ing pipeline took approximately 4.5 hours running on a process- ing server with two six-core, 3.3GHz processors with most time spent performing image processing tasks such as feature extrac- tion and matching. The same processing pipeline was performed on a dual-core, 2.4GHz laptop for comparison, taking approxi- mately 17 hours to complete. 3.2 Mapping Results Figure 4 illustrates the final photo-mosaic of the intertidal rock platform and existing manned aerial photography of the the Cape Banks area for reference. Along the western limit of the map is the waterline to the bay and along the eastern limit in the map is a steep cliff-face which is permanently above the high tide water- line. Figure 5 shows the 3D photo-textured model of the terrain recon- struction. The final 3D terrain map displayed a 3D topographic resolution of approximately 0.25 points/square-cm and a photo- texture resolution of approximately 2-4mmy/pixel. Figure 5 (b) and (c) illustrate zoomed-in views of the 3D model from medium scale to fine-scale views. The level-of-detail visualisation system allowed for different model scales to be visualised in a single, continuous terrain model. The highest level of detail information provides detailed structural information on individual rock pools with colour information indicating the presence of micro-algae coverage and assemblages of gastropods such as periwinkles and limpets. The site exhibits a number of habitats visible in the mosaic such as rock pools, boulder fields and crevices between the rock (see Figure 6). 3.3 Potential Applications in Intertidal Ecology The presented mapping technique provides two primary types of information of interest for the study of intertidal ecosystems with a high level-of-detail over large areas that would be infeasible us- ing traditional sampling methods. Topographic mapping allows for high-resolution measurements such as rugosity, vertical posi- tion on the shore with respect to tides and the slope and aspect with respect to the sun over a large area. Photographic mapping allows for the identification of intertidal species present during imaging and has the potential to provide data on variables such as chlorophyll/ algal biomass with the addition of near-infrared images. To reliably detect human and environmental impacts on plant and animal populations it is necessary to sample populations at sev- eral times and at appropriate spatial resolutions before and after the impact (see (Underwood, 1994)). Often, it is not possible to do this either for logistical or cost constraints, thus reducing the reliability of the detection of change. Our low-cost method al- lows for collections of data across a cascade of spatial scales and potentially at extremely fine temporal resolution, allowing for ap- propriate sampling to be made. This would be especially valuable for example in distinguishing natural changes such as seasonality from h change The m strata | mud fl interva can oc of mici change the cot tidal m tional of sedi of cha data to tidal c) plicatit sedime algicid phytob In this was de terrain ages ci byak ture ca almost cur spé sampli inform time ir blages The aj highly enduri registe to trac! Additi image: ment t tation, This w and th Aber, Aerial resolu VFIEC Aber, Aerial Kansa Agarw Adjus Vision

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