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MassDEP Online Map Viewer
Geographic Response Plan (GRP) Map

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All measurements should be considered as approximate.

Geographic Response Plan (GRP) Map

The MassDEP Geographic Response Plan (GRP) Map displays areas where oil spill equipment and tactics should be deployed during the early phases of a marine oil spill response.

Use the query tool to access the Geographic Response Plan Document by clicking on the center of a GRP feature on the map. The related Geographic Response Plan document (.pdf) will open in another browser window. Please make sure your browser's pop up blocker has been disabled.

The Geographic Response Plan Map layers are provided by the Massachusetts Office of Geographic Information (MassGIS) Geospatial Web Services. Base maps are provided by Bing and MassGIS.

Using the Online Map Viewer

The Map Tools allow the user to navigate and interact with the map. A map tool can be initiated by clicking on the icon in the map tool panel. A solid red outline surrounding the tool icon indicates that the tool is active. A series of buttons below the tool bar provide additional information about the map.

Map Tools

Select the Zoom in tool to zoom the map in to a larger scale. You may either click on a single spot on the map to zoom in one zoom level or zoom to a general area by clicking and dragging the cursor to create a selection box around your area of interest. Since the map uses preset zoom levels the resulting extent will be the closest preset zoom level to your chosen area. The Zoom in tool automatically recenters the map display on the selected point or the center of the selection box.

Click the Zoom out tool to zoom the map out one zoom level.

Select the Pan map tool, then click and drag the map (pan) in any direction.

Click the Zoom to full extent tool to zoom the map out to the maximum extent. This will return the map display to the default extent of the State of Massachusetts.

Click the Go to previous extent tool to return the map back to a previously viewed extents.

Click the Go to next extent tool to zoom the map forward to previously viewed extents.

Select the Information Query tool and click a GRP feature on the map to open up the related Geographic Response Plan document for that feature. If your browser's popup blocker is disabled the GRP will open in another browser window. You may also view the GRP in the Query Results Window, which can be opened by clicking Query Results in the lower right of the Map Tools toolbar.

You may also click on a MassDEP Oil Spill Response Trailer to get information about that trailer.

The Zoom to address tool opens a dialog box on the map containing a form for address, city and zipcode. Enter a Massachusetts street address (example: 1 Winter St Boston, MA 02108) into the appropriate form (please include city and zipcode), then click Submit to zoom the map to the address. A marker will appear on the map indicating the estimated location of the address. The Clear button will remove the marker and clear the address input form.

The Zoom to town tool opens a combo box containing a list of the 351 Massachusetts municipalities. when a municipality is selected from the list the map will zoom to the approximate center of the municipality.

The Map Transparency tool opens a pop-up window with a slider control. Select the tab for the layer you want to adjust and move the slider control to change the opacity (transparency) level of that layer.

Select the XY Information tool, then click on the map. A pop-up window will appear with coordinate information for that location and an orange cross will be displayed at the point where the map was clicked. Use the Clear button in the lower right corner of the XY Information pop-up to clear XY markers from the map.

The Table of Contents tool opens up the map's table of contents, which shows all the layers and base maps that can be displayed in the viewer. Turn Operational Layers and Base Maps on and off by checking or unchecking the corresponding check boxes and radio buttons. Closing the Map Layers window with the Operational Layers turned off will automatically turn the layer(s) back on.

The Measure tool can be used to measure distance and area on the map. Select Length to measure length or Area to measure area on the map.

Overview Map

Click on the Overview Map button (located in the lower right hand corner of the map) to minimize or maximize the overview map.

Questions regarding Geographic Response Plan Data or Oil Spill Response Trailers may be directed to...
Richard F. Packard
MassDEP - Oil Spill Prevention and Response Program
20 Riverside Drive
Lakeville, MA 02347
(508) 946-2856
If you require further assistance using this viewer, please contact...
Aaron Richer
MassDEP - GIS Program
1 Winter Street
Boston, MA 02108
(617) 574-6856