Sheep Creek Flowlines Generalized for 1:100,000 scale Representation

<p>This dataset comprises original and simplified versions of 28&nbsp;hydrographic flowline features in North Dakota, USA. The original data were&nbsp;derived from National Hydrography Dataset (NHD) data for the 1:24,000 Sheep Creek Dam topographic map quadrangle. Flowline features were selected for 1:100,000 scale (100k) representation using the NHD VisibilityFilter attribute and further filtered and merged to form a contiguous network. Features were then simplified for 100k representation using a combination of automated and manual operations. The dataset was created for the 24^th ICA Workshop on Map Generalisation and Multiple Representation; further details can be found in the workshop abstract. The dataset is intended to serve as a benchmark for cartographic generalization algorithms used to simplify and smooth hydrographic flowline features. &nbsp;</p> <p><strong>Statistics:</strong></p> <p>Original vertices: 9620</p> <p>Simplified vertices: 1485</p> <p>Vertex reduction: 84.6%</p> <p>&nbsp;</p> <table> <tbody> <tr> <td> <p>&nbsp;</p> </td> <td> <p><strong>Producer&#39;s Modified Hausdorff Distance (m)</strong></p> </td> <td> <p><strong>Producer&#39;s Average Distance (Vertex Influence Method)</strong></p> </td> <td> <p><strong>Sinuosity Reduction (%)</strong></p> </td> <td> <p><strong>Average Angular Deflection (degrees)</strong></p> </td> <td> <p><strong>Max Angular Deflection (degrees)</strong></p> </td> </tr> <tr> <td> <p><strong>AVG</strong></p> </td> <td> <p><strong>24.08</strong></p> </td> <td> <p><strong>4.75</strong></p> </td> <td> <p><strong>5.23</strong></p> </td> <td> <p><strong>29.61</strong></p> </td> <td> <p><strong>46.55</strong></p> </td> </tr> <tr> <td> <p><strong>MIN</strong></p> </td> <td> <p><strong>0.00</strong></p> </td> <td> <p><strong>0.00</strong></p> </td> <td> <p><strong>-0.49</strong></p> </td> <td> <p><strong>5.23</strong></p> </td> <td> <p><strong>5.23</strong></p> </td> </tr> <tr> <td> <p><strong>MAX</strong></p> </td> <td> <p><strong>38.88</strong></p> </td> <td> <p><strong>14.56</strong></p> </td> <td> <p><strong>30.40</strong></p> </td> <td> <p><strong>33.97</strong></p> </td> <td> <p><strong>53.80</strong></p> </td> </tr> </tbody> </table>