Coastal and Marine Geology Program Internet Map Server:
U.S. Atlantic and East Coast

Internet Map Server Description

U.S. Atlantic East Coast Internet Map Server default map view.  Click here for a larger image. Image will open in new browser window.

The U.S. Atlantic East Coast Internet Map Server contains published data layers and information from the U.S. Geological Survey, Coastal and Marine Geology Program (CMGP). An example of the default map view is shown at the right. This map view shows the U.S. Atlantic East Coast, portions of Canada and the Caribbean, the U.S. Atlantic East Coast GLORIA mosaic at a 250 m resolution and the Coastal Vulnerability Index showing the potential of coastal change due to sea-level rise. The most striking data layer is the 250 m resolution digital mosaic of the GLORIA (Geologic Long-Range Inclined Asdic) sidescan data collected in the Exclusive Economic Zone (EEZ) of the U.S. East Coast. These data were acquired during a major field study conducted in 1987. A data layer showing the location of other CMGP seafloor mapping surveys is also available.

In addition to the GLORIA sidescan data, location of surficial samples and bottom photographs are also available for viewing. Other basemap data layers relative to the specific mapsite have been compiled from a variety of public domain sites and are also available for viewing and download.

Within the Internet Map Server, data layers have been grouped within category headings. Clicking the appropriate data folder will expand or collapse the folder allowing the individual data layers to be displayed. Data layers may be "turned-off or on" by selecting the visible button beside the layer name. The map view will automatically update. A complete description of the available data layers and links to download the data may be found in the GIS Data Catalog.

Hyperlink properties

The data layers listed below have associated hyperlink properties. When the data layer is selected as the active data layer, selecting the hyperlink activity will result in the associated information being displayed in a new browser window.

• GLORIA mosaic index - When accessing the U.S. Atlantic East Coast Internet Map Server, a user may browse the 50 meter resolution images of the individual 21 GLORIA sidescan sonar mosaics by utilizing the hyperlink tool. With the "GLORIA mosaic index" selected as the active data layer, select the hyperlink tool from the tool menu at the left of the map view. When active, click within the outline of the selected mosaic. The individual mosaic will be displayed in a separate browser window.
• 1960 CONMAP bottom photos - When this layer is active, the user may utilize the hyperlink tool to examine archived bottom photographs. These photographs, collected during the 1960's as part of the USGS Continental Margin Program, have been rescued and georeferenced with an approximate spatial location.