Legend (support_gis/hydrography)

National Hydrologic Dataset - NHD - flowlines (0) nhd_HUC_2_g (3) nhd_HUC_4_g (4) nhd_HUC_6_g (5) nhd_HUC_8_g (7) nhd_HUC_8_g_100 (8) nhd_HUC_8_g_1000 (9) nhd_HUC_8_g_10000 (10) nhd_HUC_10_g (11) nhd_HUC_12_g (12)