Massachusetts Bay and adjacent land: continuous bathymetry and topography terrain model of the Massachusetts coastal zone and continental shelf, (32-bit GeoTIFF, UTM 19 NAD 83, NAVD 88 vertical datum).

The surveys used as sources for this and subsequent processing steps are documented below using the following format:
Data Source: Title of published dataset as listed in the source metadata.
Data URL: Web address to metadata.
Download Date: Date data were downloaded.
ASPRS Class used: (This only pertains to LiDAR data) LiDAR data are published using point classifications according to
standards established in the American Society of Photogrammetry and Remote Sensing (ASPRS).
Class number and description used for this grid are described.
Output Multipoint File: The name of the multipoint file used as input to the terrain model.
The resolution in meters of the GeoTIFF used to create the multipoint file is in parentheses.
Note: File size for historical NOAA singlebeam x,y, z data were small enough that they used simple point feature classes instead
of multipoint feature classes. In addition, these historical data are published as x,y,z only (not gridded), so there is no
cell resolution associated with them as other input datasets.

Data Source:2014 US Army Corps of Engineers (USACE) Topobathy LiDAR:Newbury (MA)
Data URL: https://coast.noaa.gov/htdata/lidar1_z/geoid12b/data/4910/ma2014_usace_nae_newbury_m4910_metadata.html
Download Date: 201705
ASPRS Class Used: class=2 (valid ground topographic data), class 29 (valid bathymetry data).
Output Multipoint File: ACOE14LiDAR_NbPt_10m_MP_navd88 (10 m)
Note:Data extent only covered Newburyport and Plum Island.				

Data Source: 2013 U.S. Geological Survey CMGP LiDAR: Post Sandy (MA, NH, RI)
Data URL: https://coast.noaa.gov/htdata/lidar1_z/geoid12b/data/4914/2013_2014_usgs_post_sandy_ma_nh_ri_metadata.html
Download date: 201604
ASPRS Class used: 2=Ground
Output Multipoint File: USGS13LiDAR_MaBay_10m_MP_navd88(10 m)

Data Source: 2011 U.S. Geological Survey Topographic LiDAR: LiDAR for the North East
Data URL: https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/2524/ne2011_usgs_lftne_metadata.html
Download Date: 201706
ASPRS Class Used: 2=Ground
Output File: USGS11_MaBay_10m_MP_navd88 (10 M)
Output File: USGS11_Islands_5m_MP_navd88 (5 M)- This covered the small islands between Salem and Cape Ann.

Data Source: 2010 US Army Corps of Engineers (USACE) Joint Airborne LiDAR Bathymetry Technical Center of eXpertise (JALBTCX) Topobathy 
LiDAR: Northeast (MA,ME, NH, RI)
Data URL: https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/1174/2010_USACE_NE_metadata.html
Download Date: 201604
ASPRS Class Used: 11=NOAA OCM Bathymetry
Output Multipoint File: ACOE2010_NShore_10m_MP_navd88 (10 m), ACOE2010_SSMaBay_10m_MP_navd88. Data were divided into two different multipoint files
(NShore=north shore, SS=south shore) for data management purposes and reduce file size.
Note: Elevation and bathymetry point clouds were published separately and only the bathymetry files were used to create this terrain model.

Data Source:mb_bathy10m: 10 meter ArcRaster bathymetric grid of Stellwagen Bank National Marine Sanctuary.
Data URL: https://pubs.usgs.gov/ds/99/webpages/massbay.html
Download Date:2005
Output Multipoint File: USGS_SBNMS_10m_MP_navd88 (10 m)

Data Source: ca_bathy5m: 5 meter ArcRaster bathymetric grid of both the inshore and offshore area of Cape Ann-Salisbury Beach Survey Area.
Data URL: https://pubs.usgs.gov/of/2007/1373/GIS/raster/bathymetry/cabath5m.html
Download Date:201609
Output Multipoint File: cabath_5m_MP_navd88 (5 m)
				
Data Source: se_5mbath: Nahant to Gloucester, Swath Bathymetry of the South Essex Survey Area.
Data URL: https://pubs.usgs.gov/of/2005/1293/gis/OFR_2005_1293/metadata/se_5mbath.htm 
Download Date:201609
Output Multipoint File:se_5mbath_MP_navd88 (5 m)
			
Data Source:dh_bathy5m:Bathymetric data collected by the U.S. Geological Survey and the National Oceanic and Atmospheric Administration 
offshore of Massachusetts between Duxbury and Hull (Esri BINARY Grid)
Data URL: https://pubs.usgs.gov/of/2009/1072/GIS/raster/bathy/dh_bathy5m.html
Download Date:2016
Output Multipoint File:dh_bath_5m_MP_navd88 (5 m)
Note: The original USGS Open File Report included the southern section of NOAA Survey H10993 that was shared by NOAA with USGS in CARIS 
HIPS format. This portion of NOAA survey H10933 was included in the Open File report to extend data coverage to the northwest and 
overlap with USGS Mass Bay Survey. Only the USGS Swath data was included in this bathy/topo terrain model. The full extent of NOAA 
H10933 was downloaded in 2017 from NOAA and used for this compilation.

Data Source: Hingham Harbor, Hingham, MA Condition Survey
Data: http://www.nae.usace.army.mil/Missions/Navigation/Massachusetts-Projects/
Collection Date: 200409
Collection Method: singlebeam
Download Date: 201706
Output file: ACOE_HinPlt04_navd88

Data Source: Weymouth Fore and Town Rivers Weymouth, Quincy, and Hull, MA after dredge/Condition Survey.
Data:http://www.nae.usace.army.mil/Missions/Navigation/Massachusetts-Projects/
Collection Date: 200703
Collection Method: Multibeam
Download Date: 201706
Output file: ACOE_WEY436_navd88

Data Source:Weymouth Back River, Hingham-Weymouth, Massachusetts, Condition Survey
Data:http://www.nae.usace.army.mil/Missions/Navigation/Massachusetts-Projects/
Collection Date: 200801
Collection Method: Multibeam
Download Date: 201706
Output file: ACOE_WBR176_navd88

Data Source: Salem Harbor, Salem, Beverly and Marblehead, MA, After Dredge Survey
Data:http://www.nae.usace.army.mil/Missions/Navigation/Massachusetts-Projects/
Collection Date: 200612
Collection Method: Singlebeam
Download Date: 201706
Output file: ACOE_SalPlt_navd88

Data Source: F00545
Data URL: https://www.ngdc.noaa.gov/nos/F00001-F02000/F00545.html
Collection Date: 2007
Collection Method: Multibeam
Download Date: 201706
Output file: F00545_5M_navd88 (5 m)
Note: Survey data delivered in 0.75 meter resolution bag file. Used an output resolution of 5 meters when converting it to a GeoTIFF.

Data Source: H11736
Data URL: https://www.ngdc.noaa.gov/nos/H10001-H12000/H11736.html
Collection Date: 2007
Collection Method: Multibeam
Download Date: 201706
Output file: H11736_5M_navd88 (5 m)
Note: Survey data delivered in 2 different bag files of 0.5, and 2 meters resolution based on depth. Combined the two bag files into one GeoTIFF 
at 5 meter resolution for input to terrain model. Survey line spacing was variable during this survey to include areas of 100 percent bottom 
coverage and others with gaps between lines.

Data Source: H11737
Data URL: https://www.ngdc.noaa.gov/nos/H10001-H12000/H11737.html
Collection Date: 2007
Collection Method: Multibeam
Download Date: 201706
Output file: H11736_5M_navd88 (5 m)
Note: Survey data delivered in 2 different bag files of 0.5, and 5 meters resolution based on depth. Combined the two bag files into one GeoTIFF 
at 5 meter resolution for input to terrain model. Survey line spacing was variable during this survey to include areas of 100 percent bottom 
coverage and others with gaps between lines.

Data Source: W00194
Data URL: https://www.ngdc.noaa.gov/nos/W00001-W02000/W00194.html
Collection Date: 2005
Collection Method:Multibeam
Download Date: 201701
Output file: W00194_8M_navd88 (8 m)
Note: Survey data delivered in 3 different bag files of 2, 4, and 8 meters resolution based on depth. Combined the three bag files into one GeoTIFF at 8 meter 
resolution for input to terrain model.

Data Source: W00195
Data URL: https://www.ngdc.noaa.gov/nos/W00001-W02000/W00195.html
Collection Date: 2005
Collection Method:Multibeam
Download Date:201706
Output file:W00195_8M_navd88 (8 m)
Note: Survey data delivered in 15 different bag files of 2, 4, and 8 meters resolution.
Used only W000195_8m_MLLW.bag (all depths combined) as a source file for conversion into NAVD 88 for the terrain model.

Data Source: H11421
Data URL: https://www.ngdc.noaa.gov/nos/H10001-H12000/H11421.html
Collection Date: 2005
Collection Method: Multibeam
Download Date: 201702
Output file: H11421_6m_MP_navd88 (6 m)
Note: Survey data delivered in 2 different bag files of 4, and 6 meters resolution based on depth.
Combined the two bag files into one GeoTIFF at 6 meter resolution for input to terrain model.

Data Source: W00037
Data URL: https://www.ngdc.noaa.gov/nos/W00001-W02000/W00037.html
Collection Date: 2003
Collection Method: Multibeam
Download Date: 201702
Output file: W00037_10m_MP_navd88 (10 m)
Note: Survey data delivered in 2 different bag files of 5, and 10 meters resolution based on depth.
Combined the two bag files into one GeoTIFF at 10 meter resolution for input to terrain model.	

Data Source: H10990
Data URL: https://www.ngdc.noaa.gov/nos/H10001-H12000/H10990.html
Collection Date: 2004
Collection Method:Multibeam
Download Date: N/A See Note below about accessing data.
Output file: H10990_2m_MP_navd88 (2 m)
Note: USGS received the CARIS HIPS project for this survey in 2006 under a cooperative agreement with NOAA/USGS/CZM for work in Boston 
Harbor that was published in USGS Open File Report 2006-1008. The bathymetry data in the original CARIS HIPS format were used as 
input to the continuous terrain model (MassBay_10m.tif) because they are higher resolution than the data currently published by NCEI (see 
Data URL above)in smooth sheet format approximately 30-m between soundings. See Ackerman, S.D., Butman, Bradford, Barnhardt, W.A.,
Danforth, W.W., and Crocker, J.M., 2006, High-resolution geologic mapping of the inner continental shelf: Boston Harbor and Approaches,
Massachusetts: U.S. Geological Survey Open-File Report 2006–1008, 1 DVD. (Also available at https://pubs.usgs.gov/of/2006/1008/.) 

Data Source: H10995
Data URL: https://www.ngdc.noaa.gov/nos/H10001-H12000/H10995.html
Collection Date: 2003
Collection Method: Multibeam
Download Date: 2006
Output file: H10995_10m_MP_navd88 (10 m)
Note:H10995_10m_combined_UTM19NAD83.txt was used as the source file for this terrain model.

Data Source: H10994
Data URL: https://www.ngdc.noaa.gov/nos/H10001-H12000/H10994.html
Collection Date: 2001
Collection Method: Multibeam
Download Date: N/A See Note below about accessing data.
Output file: H10994_10m_MP_navd88 (10 m)
Note: NOAA collected these data using both multibeam and singlebeam sonars. The singlebeam (vertical beam) data are described below in 
the SINGLEBEAM section. USGS received the CARIS HIPS project for this survey in 2006 under a cooperative agreement with NOAA/USGS/CZM 
for work in Boston Harbor that was published in USGS Open File Report 2006-1008.
See Ackerman, S.D., Butman, Bradford, Barnhardt, W.A., Danforth, W.W., and
Crocker, J.M., 2006, High-resolution geologic mapping of the inner continental shelf: Boston Harbor and Approaches, Massachusetts: U.S. Geological Survey Open-File Report 2006–1008, 1 DVD. (Also available at
https://pubs.usgs.gov/of/2006/1008/.) These bathymetry data in the original CARIS HIPS 
format were used to as input to the continuous terrain model (MassBay_10m.tif) because they are higher resolution than the data currently 
published by NCEI (see Data URL above)in smooth sheet format approximately 30-m between soundings. 

Data Source: H10992
Data URL: https://www.ngdc.noaa.gov/nos/H10001-H12000/H10992.html
Collection Date: 2001
Collection Method: Multibeam
Download Date: N/A See Note below about accessing data.
Output file: H10992_2m_MP_navd88 (2 m)
Note: NOAA collected these data using both multibeam and singlebeam sonars. The singlebeam (vertical beam) data are described below in 
the SINGLEBEAM section. USGS received the CARIS HIPS project for this survey in 2006 under a cooperative agreement with NOAA/USGS/CZM 
for work in Boston Harbor that was published in USGS Open File Report 2006-1008. These bathymetry data in the original CARIS HIPS
format were used as input to the continuous terrain model (MassBay_10m.tif) because they are higher resolution than the data currently 
published by NCEI (see Data URL above)in smooth sheet format approximately 30-m between soundings. See Ackerman, S.D., Butman, 
Bradford, Barnhardt, W.A., Danforth, W.W., and Crocker, J.M., 2006, High-resolution geologic mapping of the inner continental shelf: 
Boston Harbor and Approaches, Massachusetts: U.S. Geological Survey Open-File Report 2006–1008, 1 DVD. (Also available at            
https://pubs.usgs.gov/of/2006/1008/.) 

Data Source: H10991
Data URL: https://www.ngdc.noaa.gov/nos/H10001-H12000/H10991.html
Collection Date: 2000
Collection Method: Multibeam
Download Date: N/A See Note below about accessing data.
Output file: H10991_2m_MP_navd88 (2 m)
Note: NOAA collected these data using both multibeam and singlebeam sonars. The singlebeam (vertical beam) data are described below in 
the SINGLEBEAM section. USGS received the CARIS HIPS project for this survey in 2006 under a cooperative agreement with NOAA/USGS/CZM
for work in Boston Harbor that was published in USGS Open File Report 2006-1008. These bathymetry data in the original CARIS HIPS
format were used as input to the continuous terrain model (MassBay_10m.tif) because they are higher resolution than the data currently 
published by NCEI (see Data URL above)in smooth sheet format approximately 30-m between soundings. See Ackerman, S.D., Butman, 
Bradford, Barnhardt, W.A., Danforth, W.W., and Crocker, J.M., 2006, High-resolution geologic mapping of the inner continental shelf:
Boston Harbor and Approaches, Massachusetts: U.S. Geological Survey Open-File Report 2006–1008, 1 DVD. (Also available at
https://pubs.usgs.gov/of/2006/1008/.) 

Data Source: H10993
Data URL: https://www.ngdc.noaa.gov/nos/H10001-H12000/H10993.html
Collection Date: 2003
Collection Method: Multibeam
Download Date: 2017-6
Output file: H10993_10m_MP_navd88 (10 m)
Note:H10993_10m_combined_UTM19NAD83.txt was used as the source file for this terrain model.

Data Source: W00038
Data URL:https://www.ngdc.noaa.gov/nos/W00001-W02000/W00038.html
Collection Date: 2003
Collection Method:Multibeam
Download Date: 201702
Output file: W00038_10m_MP_navd88 (10 m)
Note: Survey data delivered in 2 different bag files of 5, and 10 meters resolution based on depth. 
Combined the two bag files into one GeoTIFF at 10 meter resolution for input to terrain model.

Data Source: W00039
Data URL: https://www.ngdc.noaa.gov/nos/W00001-W02000/W00039.html
Collection Date: 2003
Collection Method: Multibeam
Download Date: 201706
Output file: W00039_10m_MP_navd88 (10 m)
Note: Survey data delivered in 2 different bag files of 5, and 10 meters resolution based on depth.
Combined the two bag files into one GeoTIFF at 10 meter resolution for input to terrain model.

Data Source: W00040
Data URL: https://www.ngdc.noaa.gov/nos/W00001-W02000/W00040.html
Collection Date: 2003
Collection Method: Multibeam
Download Date: 201706
Output file: W00040_10m_MP_navd88 (10 m)
Note: Survey data delivered in 2 different bag files of 5, and 10 meters resolution based on depth. 
Combined the two bag files into one GeoTIFF at 10 meter resolution for input to terrain model.

Data Source: W00041
Data URL: https://www.ngdc.noaa.gov/nos/W00001-W02000/W00041.html
Collection Date: 2003
Collection Method: Multibeam
Download Date: 201702
Output file: W00041_10m_MP_navd88 (10 m)
Note: Survey data delivered in 2 different bag files of 5, and 10 meters resolution based on depth.
Combined the two bag files into one GeoTIFF at 10 meter resolution for input to terrain model.

Data Source: W00044
Data URL: https://www.ngdc.noaa.gov/nos/W00001-W02000/W00044.html
Collection Date: 2003
Collection Method: Multibeam
Download Date: 201706
Output file: W00044_10m_MP_navd88 (10 m)

Data Source: W00045
Data URL: https://www.ngdc.noaa.gov/nos/W00001-W02000/W00045.html
Collection Date: 2003
Collection Method: Multibeam
Download Date: 201706
Output file: W00045_10m_MP_navd88 (10 m)

Data Source: W00046
Data URL: https://www.ngdc.noaa.gov/nos/W00001-W02000/W00046.html
Collection Date: 2003
Collection Method: Multibeam
Download Date: 201706
Output file: W00046_10m_MP_navd88 (10 m)

Data Source: W00047
Data URL: https://www.ngdc.noaa.gov/nos/W00001-W02000/W00047.html
Collection Date: 2003
Collection Method: Multibeam
Download Date: 201706
Output file: W00047_10m_MP_navd88 (10 m)

Data Source: W00048
Data URL: https://www.ngdc.noaa.gov/nos/W00001-W02000/W00048.html
Collection Date: 2003
Collection Method: Multibeam
Download Date: 201706
Output file: W00048_10m_MP_navd88 (10 m)
				
SINGLEBEAM DATA	

Data Source:H10991
Data URL:https://www.ngdc.noaa.gov/nos/H10001-H12000/H10991.html
Collection Date: 2000
Collection Method:Singlebeam
Download Date:N/A See Note below about accessing data.
Output file:H10991_VB_navd88
Note: NOAA collected these data using both multibeam and singlebeam sonars. The multibeam data are described above.USGS received the 
CARIS HIPS project for this survey in 2006 under a cooperative agreement with NOAA/USGS/CZM for work in Boston Harbor that was 
published in USGS Open File Report 2006-1008. These bathymetry data in the original CARIS HIPS format were used as input to the 
continuous terrain model (MassBay_10m.tif) because they are higher resolution that the data currently published by NCEI (see Data URL 
above)in smooth sheet format approximately 30-m between soundings. See Ackerman, S.D., Butman, Bradford, Barnhardt, W.A., Danforth, 
W.W., and Crocker, J.M., 2006, High-resolution geologic mapping of the inner continental shelf: Boston Harbor and Approaches,
Massachusetts: U.S. Geological Survey Open-File Report 2006–1008, 1 DVD. (Also available at https://pubs.usgs.gov/of/2006/1008/.) 

Data Source:H10992
Data URL: https://www.ngdc.noaa.gov/nos/H10001-H12000/H10992.html
Collection Date: 2001
Collection Method:Singlebeam
Download Date:N/A See Note below about accessing data.
Output file:H10992_VB_MP_navd88 (2 m)
Note: NOAA collected these data using both multibeam and singlebeam sonars. The multibeam data are described above. USGS received the 
CARIS HIPS project for this survey in 2006 under a cooperative agreement with NOAA/USGS/CZM for work in Boston Harbor that was published
in USGS Open File Report 2006-1008. These bathymetry data in the original CARIS HIPS format were used as input to the continuous 
terrain model (MassBay_10m.tif) because they are higher resolution than the data currently published by NCEI (see Data URL above)in smooth 
sheet format approximately 30-m between soundings. See Ackerman, S.D., Butman, Bradford, Barnhardt, W.A., Danforth, W.W., and Crocker, 
J.M., 2006, High-resolution geologic mapping of the inner continental shelf: Boston Harbor and Approaches, Massachusetts: U.S. 
Geological Survey Open-File Report 2006–1008, 1 DVD. (Also available at https://pubs.usgs.gov/of/2006/1008/.) 

Data Source: H10994
Data URL: https://www.ngdc.noaa.gov/nos/H10001-H12000/H10994.html
Collection Date: 2001
Collection Method:Singlebeam
Download Date:N/A See Note below about accessing data.
Output file:H10994_VB_navd88
Note: NOAA collected these data using both multibeam and singlebeam sonars. The multibeambeam data are described above.USGS received the 
CARIS HIPS project for this survey in 2006 under a cooperative agreement with NOAA/USGS/CZM for work in Boston Harbor that was published
in USGS Open File Report 2006-1008. These bathymetry data in the original CARIS HIPS format were used as input to the continuous 
terrain model (MassBay_10m.tif) because they are higher resolution than the data currently published by NCEI (see Data URL above)in smooth 
sheet format approximately 30-m between soundings. See Ackerman, S.D., Butman, Bradford, Barnhardt, W.A., Danforth, W.W., and Crocker, 
J.M., 2006, High-resolution geologic mapping of the inner continental shelf: >Boston Harbor and Approaches, Massachusetts: U.S. 
Geological Survey Open-File Report 2006–1008, 1 DVD. (Also available at https://pubs.usgs.gov/of/2006/1008/.)

Data Source: H08940
Data URL: https://www.ngdc.noaa.gov/nos/H08001-H10000/H08940.html
Collection Date: 1967
Collection Method: Fathometer
Download Date: 201706
Output file: H08940_navd88

Data Source: H08941
Data URL: https://www.ngdc.noaa.gov/nos/H08001-H10000/H08941.html
Collection Date: 1967
Collection Method: Fathometer
Download Date: 201706

Data Source: H08008
Data URL: https://www.ngdc.noaa.gov/nos/H08001-H10000/H08008.html
Collection Date: 1952
Collection Method: Echosounder
Download Date: 201706
Output file: H08008_navd88

Data Source: H07066
Data URL: https://www.ngdc.noaa.gov/nos/H06001-H08000/H07066.html
Collection Date: 1945
Collection Method: Echosounder
Download Date: 201706
Output file: H07066_navd88

Data Source: H07715
Data URL:https://www.ngdc.noaa.gov/nos/H06001-H08000/H07715.html
Collection Date: 1948
Collection Method: Echosounder
Download Date: 201706
Output file: H07715_navd88

Data Source: H06642
Data URL:https://www.ngdc.noaa.gov/nos/H06001-H08000/H06642.html
Collection Date:1940
Collection Method:Echosounder
Download Date:201706
Output file:H06642_navd88

Data Source: H06643
Data URL: https://www.ngdc.noaa.gov/nos/H06001-H08000/H06643.html
Collection Date: 1940
Collection Method: Echosounder
Download Date: 201706
Output file: H06643_navd88