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This map layer portrays the current routes used for conducting Breeding Bird Surveys in the lower 48 States. This data set was collected using a different roads file from that available through the National Atlas of the United States, so there may be positional differences between the two map layers.
The North American Breeding Bird Survey Routes map layer was compiled by USGS Patuxent Wildlife Research Center.
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Metadata
What follows is very detailed technical information about this map layer. This is often called metadata. Metadata (or "data about data") describe the content, quality, condition, and other characteristics of data. Metadata are used to organize and maintain investments in data, to provide information to data catalogs and clearinghouses, and to aid data transfers. The Federal Geographic Data Committee (FGDC) publishes the Content Standard for Digital Geospatial Metadata. Many organizations within and outside of the federal government have adopted the FGDC metadata standard and are using automated indexing and serving mechanisms to provide access to their holdings through the Internet. Visit the FGDC Clearinghouse to learn more about how metadata is used in clearinghouses and to search for other data sets.
Arc/INFO and ArcView are products of Environmental Systems Research Institute, Inc. (ESRI), 380 New York Street, Redlands, CA 92373. Reference to ESRI products is for information purposes only and does not constitute endorsement by the U.S. Geological Survey.
This data set was collected using a different roads file from that available through the National Atlas of the United States, so there may be positional differences between the two map layers.
If the route did not start at an intersection, the starting point may be slightly off. Portions of the route are sometimes skipped because of traffic noise or overlap with other routes. These skipped portions are usually not indicated.
The maps we used did not always indicate the exact ending points of the routes, so in many cases the ending points are estimated and the routes digitized are longer then the actual route run.
Occasionally portions of the roads on which Surveys were conducted were not contained on the digital road files we used. For these cases the road locations were very roughly estimated.
BBS routes for Minnesota and Wisconsin were digitized by James M. Sales, University of Minnesota, Duluth, UMD Natural Resources Research Institute, Duluth, MN, 55812. The Virginia routes were provided to us by Jeffrey B. Trollinger, Fish and Wildlife Information System, Virginia Department of Game and Inland Fisheries, 4010 West Broad Street, Richmond, VA 23280. The California routes were provided to us by Allan Hollander, University of California, Santa Barbara, Santa Barbara, CA, 93106. The data was then converted into a format consistent with ours. We used ArcView to add newly created and missing routes to these files.
For each State, an Arc/INFO route system was added using the Arc/INFO MEASUREROUTE command. The JOINITEM command was used to add the route name from the BBS Database (BBSDA). The APPEND command was then used to create a single coverage for the National Atlas.
ID Number State ------------------------------- 2 Alabama 6 Arizona 7 Arkansas 14 California 17 Colorado 18 Connecticut 21 Delaware 25 Florida 27 Georgia 33 Idaho 34 Illinois 35 Indiana 36 Iowa 38 Kansas 39 Kentucky 42 Louisiana 44 Maine 46 Maryland 47 Massachusetts 49 Michigan 50 Minnesota 51 Mississippi 52 Missouri 53 Montana 54 Nebraska 55 Nevada 58 New Hampshire 59 New Jersey 60 New Mexico 61 New York 63 North Carolina 64 North Dakota 66 Ohio 67 Oklahoma 69 Oregon 72 Pennsylvania 77 Rhode Island 80 South Carolina 81 South Dakota 82 Tennessee 83 Texas 85 Utah 87 Vermont 88 Virginia 89 Washington 90 West Virginia 91 Wisconsin 92 Wyoming