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    Tissot Indicatrix - Examining the distortion of map projections, courtesy of Matt Perry

    Distortion in un-projected lat-long:
    latlong_distortion.png A tissot shapefile you can load into your gis to demonstrate projection distortion

    A really useful enhancement would be to change the script to generate more and smaller tissot circles for smaller localised projections like UTM. [hint hint]

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