There should be anywhere from 20-250 different visual shots depending on the size and complexity of your object / or building. When creating photogrammetric based models, they require at least one image per surface and have graphic key details visible in two images. Finally there is photogrammetry using images from drones, aircraft, or even satellite images. There is photogrammetry that focuses on smaller objects, such as close-range photogrammetry (one DSLR camera or mobile phone camera for smaller objects), camera arrays (several cameras for object reconstruction), and wide-angle photogrammetry (using wide-angle lens or a 360 camera for building interiors or outdoor spaces). It restructures a wide range of still images into a model by looking for overlaps in the visual details in each photo. This is key towards effective communication and public engagement, as so for the public to interpret the model and offer insights into the area. For example (see above) it should enable easy recognition of key landmarks to aid with navigation. At minimum, the model will ideally help provide context to your project to help with the following:Įven a model with a low graphical spec, such as a low resolution or lack of textures, the model should retain a recognisable silhouette of the built environment. Secondly, when creating 3D models for a project, it is essential to follow criteria that will match the requirements of the use of the model, for example, in citizen engagement and the public stakeholders that you are interested in engaging with.įinally, it is important to note the quality of the 3D model and if it meets certain standards that will aid the public consultation. If you commission a model of the site context for instance, on a smaller scale it might not be longer cost prohibitive but might instead have larger a social value for the community (i.e specific historical sites.) This might only require a smaller drone or use camera images on a building scale, but will still require a specialist to bring in their understanding of photogrammetry to capture the object. Weighing up the use of a 3D photogrammetric model is also important. We can observe that these methods are interconnected, but not identical.Ĭonsiderations for using 3D models in public consultationsįirst, it is crucial to understand that this technology is not currently standard in public engagement and that there are a variety of ways and approaches to creating a 3D model. We then explore the requirements that produce a 3D model via, photogrammetry, aerial photogrammetry, and laser scanning surveying. Beginning with what is considered before the creation of a photogrammetric 3D model for a consultation. Specifically, I focus on photogrammetry as a solution to environmental, heritage, architectural, archaeological, ecological and community consultations to aid clarification before any conceptual designs are devised. Reviewing these options, I conclude with the advantages and disadvantages of using such services for engagement. This article will look at the tools and services available for organisations who want to capture the current environment within a 3D model. Professionals in urban planning have also begun developing 3D models as they collaborate with 3D modelers (or 3D artists), but unlike the humble dress, develop a 3D model on a much grander scale. For instance the Tredwell dress from the Merchant House. It has been used by historians, designers and architects who have been able to capture objects who would like to present objects with a rounded perspective. This is done by compiling 3D models by 2D images by a computer. This is called ‘photogrammetry’ and has been popular amongst 3D model creation. The abundant availability of images of the world and computing power means that we can now more easily create 3D models from photos. Cities such as Manchester or Newcastle/Gateshead hold large-scale models of their city centres. No longer confined to the realms of the Gaming Industry, built environment professionals increasingly use 3D visualisations in Urban Planning. In the second part of a series, this article presents the 3D models of larger geographic areas, such as neighbourhoods or cities, that have the potential to support public consultations. There is a greater push for design quality within the industry, and this has been supported by the UK Government (see White Paper on Planning for the Future) which may see 3D visualisations of current and the future built environments take a more permanent and prominent role within the planning process, including public consultation. In part one of the series, we evidenced a growing adoption of 3D modelling and model making for community engagement.
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