Photogrammetry
is the technique of creating a 3D model (or topology) from a series of
photographs. Basically, you take a series of photos of your subject from
varying angles. The object being modeled can be small (I have done it
with the skull of an extinct animal) to a landscape (the biggest I have
done is my backyard, but it can be done at a very large scale). From
this series of photos, computer software is used to determine the shape
of the object by comparing the same points in different shots and the
various angles of focus. The result is a "mesh" or 3D model of your
object.
Below is a very low resolution example of a photogrammetric model of a garden in my backyard created by taking about 50 images around the bird bath in the photo. It is a wire-frame model that can be fully rotated.
This article discusses the intersection of photogrammetric modeling and GIS. Just like geolocating a raster or historical image to a map, we can now geolocate a 3D mesh to a map. The uses of this will be many, but I am particularly interested in how it can be used in archaeology. Imagine being able to go out to a complex archaeological site (like a pueblo house structure), spend the day taking lots of photos from every conceivable angle, and then building a 3D model from those photos and plopping it directly into a map. It will be an amazing way to capture data and even to compare sites over time. And it won't be just for archaeology but environmental work, urban planning, pretty much anything you can imagine as a 3D model that you need to analyze spatially.
Photogrammetric Modeling + GIS by Rachel Opitz and Jessica Nowlin, 2012, ERSI News
Below is a very low resolution example of a photogrammetric model of a garden in my backyard created by taking about 50 images around the bird bath in the photo. It is a wire-frame model that can be fully rotated.
This article discusses the intersection of photogrammetric modeling and GIS. Just like geolocating a raster or historical image to a map, we can now geolocate a 3D mesh to a map. The uses of this will be many, but I am particularly interested in how it can be used in archaeology. Imagine being able to go out to a complex archaeological site (like a pueblo house structure), spend the day taking lots of photos from every conceivable angle, and then building a 3D model from those photos and plopping it directly into a map. It will be an amazing way to capture data and even to compare sites over time. And it won't be just for archaeology but environmental work, urban planning, pretty much anything you can imagine as a 3D model that you need to analyze spatially.
Photogrammetric Modeling + GIS by Rachel Opitz and Jessica Nowlin, 2012, ERSI News
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