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

This dataset comprises original and simplified versions of 28 hydrographic flowline features in North Dakota, USA. The original data were 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 24th 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.  

Statistics:

Original vertices: 9620

Simplified vertices: 1485

Vertex reduction: 84.6%

Producer's Modified Hausdorff Distance (m)

Producer's Average Distance (Vertex Influence Method)

Sinuosity Reduction (%)

Average Angular Deflection (degrees)

Max Angular Deflection (degrees)

AVG

24.08

4.75

5.23

29.61

46.55

MIN

0.00

0.00

-0.49

5.23

5.23

MAX

38.88

14.56

30.40

33.97

53.80