For my PhD research I am using ArcGIS to map the shape and size of microscopic structures in a human tissue sample. The microscope images I am using have been mounted onto microscopy slides and are therefore flat. In order to determine the area of the structures, I need to project my image of the structures on a map of a known scale. However, the map projections available in ArcMap are at the kilometer-level, where the scale of microns is irrelevant. When I project my images onto a map of a known scale, the problem of distortion arises, since all the provided projections are spheroid. Is it possible to create a flat projection at the micro (mm or µm) scale?
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