|Low Detail Gray
|USGS National Map|
|Microsoft Bing Aerial|
|Microsoft Bing Street|
Data themes available in this viewer are those that have been identified as priority data needed to aid in the scientific assessments of fish habitat and fish populations. The Biological Data theme will primarily consist of fish data until other species occurrence data are identified as priority of NFHP and provided for broader access.
Compiling data for the Connectivity Data Theme will be focused on next. Future priority data themes will be determined through the efforts of the National Science and Data Committee.
Selections from this menu include "All Datasets" or "Linked to Spatial Framework."
"All Datasets" refers to datasets that have been made available to the National Fish Habitat Partnership and follow the NFHP data management requirements including FGDC compliant metadata documentation and approval processes for data release.
In addition to following the NFHP data management requirements, datasets that are "Linked to Spatial Framework" have also undergone additional processing that attributes the data to the finest spatial classification unit in the NFHP spatial framework, which is a reach of the National Hydrography Dataset Plus Version 1 (NHDPlusV1) at 1:100K. By linking these data to the NHDPlusV1, the data are in turn linked to the other coarser units in the NFHP spatial framework including the Hydrologic Unit Code (HUC)12, HUC8, and Ecological Drainage Units.
Selections from this menu include "Number of Datasets" or "Number of Samples". Both selections display counts per 12-digit Hydrologic Unit Code (HUC12).
"Number of Datasets" refers to the count of datasets that have information within each HUC12.
"Number of Samples" refers to the total count of records from the selected datasets within each HUC12.
Additional map layers may be displayed on top of the map. These layers include State and County Boundaries, Congressional Districts, and NHD Hydrography, three map layers from the National Map effort of the U.S. Geological Survey's National Geospatial Program, and Landscape Conservation Cooperatives (LCCs). LCCs are public-private partnerships working toward a more networked approach to conservation; holistic, collaborative, adaptive and grounded in science to ensure the sustainability of America's land, water, wildlife and cultural resources.
To display a layer on top of the map, select it from the list and make sure the check box next to Reference Layers is also selected.