The Add Data tool in the Advanced toolbar allows you to add an ArcGIS Server (AGS) REST service, Keyhole Markup Language (KML) data file, Really Simple Syndication (RSS), Web Map Service (WMS), or Web Map Tile Service (WMTS) to the map display.  Before...
The capture and movement of wild-caught baitfish is of special concern for spreading Asian carp. Young Asian carp could easily be transferred, as baitfish, from one body of water to another. In particular, juvenile silver carp sometimes school with...
Eradication of any established population of Asian carp would be extremely difficult and expensive, if possible at all. Effective management of established invasive species that cannot be eradicated usually employs integrated pest management. This...
PLSS data is available in the Content sub-tab under Overlays in a panel called Other Featured Data in the table of contents of The National Map viewer. PLSS data layers, such as sections, townships, and ranges, are provided by the Bureau of Land...
The National Map Viewer Quick Start Guide can be found here.
Silver carp have been observed to leap into the air simultaneously as an apparent fright reaction to rocks thrown in the water, passing trains, geese taking off from the water, or when they unexpectedly find themselves in a tight place. Speeding boats...
There are many carp native to Asia, but in North America, “Asian carp” usually refers to bighead, black, grass, and silver carp — all of which are nuisance species in inland waterways. The Asian carp that have garnered the most attention are bighead and...
Open Issues/Key Notes(last updated: 10/28/2014)ViewerTested in Internet Explorer (IE) 10, Chrome 38, Firefox 32, and Safari on Windows and Apple operating systems. Other browsers and platforms have not been fully tested. There is a known issue with IE 11...
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Contours are not projected, but are provided in geographic coordinates (latitude and longitude) in units of decimal degrees, and horizontally referenced to the North American Datum of 1983. Contour elevation values are vertically referenced to the North ...