Primary input to this effort has been interviews conducted by fishermen contracted by
the individual state Sea Grant programs. For the most part, information concerning
where fishing gears were used by the various gear types was drawn directly onto charts
used by fishermen in their local area. The resultant composite charts were then
digitized into ArcView as individual shapefiles for each gear type and state Sea Grant 
program. Screen shots of individual layers were then exported from ArcView as bitmaps,
then saved as transparent .gif images, so that only the relevant part of each 
displayed in the image layer stack when called. The javascript code was modified 
to reflect the spatial extent of each image and georeferenced as closely as 
possible when data was obtained from other sources.

Here is a list of the six participating Sea Grant programs from the region and the 
people involved in the data collection effort for this project:

1. University of Maine Sea Grant Extension		Sherm Hoyt
	industry interviewer

2. University of New Hampshire Sea Grant Extension	Rollie Barnaby
	industry interviewer				Peter Kendall

3. Massachusetts Institute of Technology Sea Grant	Cliff Coudey
   Woods Hole Oceanographic Institution			Judith McDowell
	industry interviewer				Richard Taylor

4. University of Rhode Island Sea Grant			Dave Beutel
	industry interviewer

5. University of Connecticut Sea Grant			Nancy Balcom
	industry interviewer				Mike Tyler

6. Cornell University Sea Grant				Antoinette Clementson
	industry interviewer				Sima Freierman

Other data used to produce these image layers have been gathered from many places. Two
outstanding sources are the US Geological Survey and the National Marine Fishery Service.

Basic data layer explanantion and sources include:

1. Shaded Bathymetric background image for all scales was obtained from the Roworth/Signell 
   Digital Bathymetry of the Gulf of Maine website.

2. Bathymetric contours for 50 and 100 fathoms, modified from contours available at the Roworth/Signell 
   Digital Bathymetry of the Gulf of Maine website.

3. Coastal and offshore charts were geographically registered within ArcView using the Chartviewer
   extension developed by NOAA.

4. The Closed Areas (black outlines) to protect groundfish were instituted in late 1994 and evolved from
   seasonal spawning closures that had been in place for a number of years. The red area just
   south of Hudson Canyon off New York was closed in 1997 solely to allow growth in a large set of small
   scallop found there in the 1996 survey. Despite this area not being closed to other fisheries there
   was rapid growth of the small scallop and since 2001 it has been opened seasonally for a limited 
   amount of fishing (F=~0.2) with Days At Sea (DAS) tradeoffs for a specified number of pounds. See
   Barbara Stevenson's website,

5. Scallop rotational areas are portions (red outlines in the Northeast Region scale) of the groundfish 
   closed areas that have been traditional scallop fishing grounds. These areas were last opened for
   limited scallop fishing in 1999 and 2000 after lengthy discussions to determine times of lowest
   groundfish bycatch. The black outlined area on the Northern Edge of Georges Bank is the Habitat of
   Particular Concern (HAPC) for small cod currently off limits to fishing.

6. USGS sediment map depicts substrate extrapolated from the grab sample database.
   Larry Poppe and Chris Polloni, eds. CD-ROM

7. USGS Multibeam Bathymetry for Stellwagen Bank National Marine Sanctuary	Page Valentine, et al

8. Vessel Trip Report (VTR) maps 			David Stevenson, NMFS, NERO
   These images were prepared from information provided by vessel skippers at the end of each fishing trip,
   a requirement for most permit holders (e.g. multispecies and scallop) in the Northeast Region. VTR data
   was then binned into 10 minute squares. Black squares are coded to represent the top 50% of effort (the 
   top two quartiles), grey the next quartile (black and grey total 75% of effort), the white squares are
   the next 15% (total 90%) and the blank areas of each map are the least used 10% bottom for the gear type.

5. Boatracs scallop fleet position plots		Paul Rago, NMFS, NEFSC, and Mike McSherry, NMFS, NERO
   The scallop fleet is required to maintain a Vessel Monitoring System (VMS) since 1998 that records vessel
   position generally each hour and is accurate within about 1100 feet. The images used in this effort were
   originally generated by Rago and McSherry for presentation at the Gear Effects Workshop, November 2000. 
   Fishing effort was approximated by only counting those positions where the distance moved was 5nm or less
   for the hour between polling by the satellite. Red color indicates the top quartile of effort binned into
   1 mile squares, then proceeding on down through yellow, green and blue.

6. SMAST trawler project image is from the School of Marine Science and Technology, University of Massachusetts,
   Dartmouth. Symbols reflect amount of cod caught from tows with the large blue circles indicating the highest
   amount. Use in this study is to show general areas of operation for the New Bedford net trawler fleet.

7. Frontal probability image				Jim Bisagni, SMAST, and Tim Mavor, NESDIS
   This image was produced by Bisagni and Mavor, using NOAA AVHRR data from the years 1978 to 1995 for the
   GLOBEC Georges bank program. Color codes represent the probability of a temperature front being present, 
   with red the highest, then on down to yellow, light blue and so on. Fronts are not stationary, varying
   with tide state, wind strength and direction, and season, producing movement that results in the 'blurring'. 

8. SeaWiFs color animations				Andy Thomas, University of Maine
   While there are many sources for satellite imagery, this site is especially well laid out and accessible.

9. Closed Area particle drift animation	(Gulf of Maine)	Craig Lewis, Dartmouth College, Thayer School of Engineering
   The animations of particle drift that simulate scallop larval dispersal from the Closed Areas on Georges
   were produced by Craig Lewis. The website above has many other simulations... this one is last on the page
   and was reformatted from the original .flc to an animated .gif, realigned and cut to fit this application.

10. Essential Fish Habitat (juvenile) maps	Mike Pentony, New England Fishery Management Council, 1998-99
   The short version of how this map was produced was by combing the NMFS/NEFSC trawl survey data for the
   juveniles of each managed species, then binning them by 10min lat/lon 'squares'. The data was further sliced
   to determine whether the square was in the top two quartiles, the third quartile or the 90%ile. The specific
   quartile selected to assign EFH for each species was determined independently, meaning that for some species
   the 50%ile was used, for others the 75%ile, and so on, on a species by species basis. At that point the map
   for each was made binary, each square either was or was not considered EFH. The resultant maps for all species
   were then added up with higher numbers of species yielding darker green shades. Some additional data was in-
   corporated into the EFH designation, estimated at 10% or less contributed from both the commercial fishing
   and scientific communities.

11. Plots of juvenile cod, haddock, and scallop 		NMFS, Northeast Fishery Science Center, Woods Hole
    Data from the NEFSC groundfish and scallop surveys 1982 thru 1996. For groundfish increasing size indicates 
    larger number per tow, for scallop red markers indicate the highest numbers, then on down through yellow,
    green and black.

12. Scallop <70mm (NMFS) animation from the annual R/V Albatross IV Scallop Survey, 1982-1996
    Red color (most per tow) then on down through yellow, bright green, dark green (mean). Small black dots
    indicate a tow was made that yielded no small scallop.

13. GOES Infrared loop 12/23 from the 4km thermal IR4 band on the NOAA eastern geostationary GOES-12 satellite.
    These images are from 12/23/2003. Daily updates via
   N.B.- this file is preliminary and will be updated as more information is gathered... 1-2-2004.