3D PDF files are a fun way to explore the relationships between topography, surface geology, and subsurface geology (represented by cross sections and borehole data). What’s even better is that no expensive or special software is needed to view them! Files can be viewed and manipulated with the freely-available Adobe® Reader®.
Users can zoom, pan, and spin the map, viewing the geology in 360°, and experiment with different lighting and transparency options. Users can also identify subsurface geologic units by clicking on layers within the cross sections and boreholes.
DGER has just released the Seabeck-Poulsbo map (see above) as a 3D PDF. It joins the Sultan 3D PDF (that was made available in July) in our growing selection of digital 3D maps. Currently, the DNR Subsurface Geology webpage hosts the downloadable 3D PDFs, but beware as they are large files! Seabeck-Poulsbo is over 50 MB.