Kristina H. Yamamoto Eric Constance Kim Mantey Jeremy Vinyard-Houx Samantha Arundel 2013 <p>Initial visual assessments</p> <br/> <p>Wide range in the quality of fit between features in NHD and these new image sources.</p> <br/> <p>No statistical analysis has been performed to actually quantify accuracy</p> <br/> <p>Determining <i>absolute accuracy</i> is cost prohibitive (must collect independent, well defined test points)</p> <br/> <p>Quantitative analysis of <u>relative</u> positional error <u>is</u> feasible.</p> application/pdf en U.S. Geological Survey Alaska national hydrography dataset positional accuracy assessment study book