Identification_Information
     Citation
	  Citation_Information
	       Originator:  NOAA Coastal Services Center
	       Publication_Date:  1997
	       Title:  New Technologies for Coastal Mapping
		    Subtitle:  Hurricane Erin Turbidity
	       Geospatial_Data_Presentation_Form:  remote-sensing image
	       Publication_Information
	       Publication_Place:  Charleston, South Carolina
	       Publisher:  NOAA Coastal Services Center
Description
     Abstract: 
	  These data consist of retrospective turbidity images from the	period
	  around the landfall of hurricane Erin.  This imagery was derived from the
	  advanced very high resolution radiometer (AVHRR) sensor aboard the NOAA
	  series polar-orbiting satellites and covers the coastal areas of the Gulf
	  of Mexico.  9 unique turbidity images are included on the CD-ROM during 
	  the time period surrounding Erin's landfall from July 24 to August 4, 
	  1995.  Image resolution is 1.3 km.
     Purpose:
	  The purpose of these data is to provide simplified, rapid access to the
	  conditions of turbidity before and after hurricane Erin.  These images can
	  assist and inform marine scientists and coastal fisheries resource 
	  managers of hurricane induced changes in overall water clarity.
     Supplemental_Information:
	  The original hurricane turbidity imagery was cropped, georeferenced,
	  navigated and registered to a continental outline (vector).  Subsequently
	  it was processed to add a landmask, reflectance scale, and annotation. 
	  The data imagery is contained in a GEOTIFF image graphics file format.  
	  The "before" and "after" views are available as JPEG image graphics files
	  as well.  Also available on the CD-ROM is a freeware version of PCI
	  Handler (one compiled and one compressed) for viewing the GEOTIFF images.
	  The inclusion of any software does not imply endorsement.
Time_Period_of_Content
     Time_Period_Information
	  Range_of_Dates/Times
	       Beginning_Date:  July 24, 1995
	       Ending_Date:  August 4, 1994
     Currentness_Reference:  Time and Date of AVHRR scene and ground condition
Status
     Progress:  Complete
     Maintenance_and_Update_Frequency:  None planned
Spatial_Domain
     Bounding_Coordinates
	  West_Bounding_Coordinate:  89.90691W
	  East_Bounding_Coordinate:  78.07965W
	  North_Bounding_Coordinate:  31.79490N
	  South_Bounding_Coordinate:  25.94527N
	  Coordinate_Corner_Locations:  Locations are the edges of bounding coordinates
                                        not the centers      
Keywords
     Theme
	  Theme_Keyword_Thesaurus:  none
	  Theme_Keyword:  Turbidity
	  Theme_Keyword:  water reflectance
	  Theme_Keyword:  Advanced Very High Resolution Radiometer (AVHRR)
	  Theme_Keyword:  High Resolution Picture Transmission (HRPT)
	  Theme_Keyword:  remote-sensing
	  Theme_Keyword:  satellite
	  Theme_Keyword:  hurricane
	  Theme_Keyword:  coastal erosion
	  Theme_Keyword:  oceanography
	  Theme_Keyword:  ocean currents
	  Theme_Keyword:  water clarity
     Place
	  Place_Keyword_Thesaurus:  none
	  Place_Keyword:  United States of America
	  Place_Keyword:  Southeast
	  Place_Keyword:  Gulf of Mexico
	  Place_Keyword:  Florida
	  Place_Keyword:  Vero Beach
	  Place_Keyword:  Pensacola
Access_Constraints:  none
Use_Constraints:  
     Data set is not for use in litigation or suitable for use in navigation. 
     Commercial use is prohibited
Point_of_Contact
     Contact_Organization:  NOAA Coastal Services Center
     Contact_Person:  John Brock
     Contact_Address
	  Address_Type:  mailing and physical
	  Address:  2234 South Hobson Avenue
	  City:  Charleston
	  State_or_Province:  South Carolina
	  Postal_Code:  29405-2413
     Contact_Voice_Telephone:  (803) 974-6200
     Contact_Electronic_Mail_Address:  crs@csc.noaa.gov
Data_Quality_Information
     Attribute_Accuracy
  	  Attribute_Accuracy_Report:
	       The accuracy of the reflectance data is currently unknown.
     Logical_Consistency_Report:  
	  Post processing analysis indicated all image files contained turbidity 
	  data and were consistently geo-located through hand navigation and 
	  registration to within one pixel (~ 1 km).
     Completeness_Report:  
	  Images in this data set were chosen based on being relatively cloud free
	  and having good registration accuracy.  A total of 13 images were 
	  processed with 9 selected for inclusion on the CD-ROM based on the above
	  criteria.  
     Positional_Accuracy:
	   Horizontal_Positional_Accuracy:
		The grid size for all the images is 850x450 pixels.
     Lineage
	  Source_Information
   	       Source_Citation
		    Citation_Information
			 Originator:  NOAA
			 Publication_Date:  Acquisition date of actual image
			 Title:  New Technologies for Coastal Mapping
		   	      Subtitle:  Hurricane Erin Turbidity
			 Edition:  NA
			 Geospatial_Data_Presentation_Form:  remote-sensing image
			 Publication_Information
		  	      Publication_Place:  Silver Springs, Maryland
			      Publisher:  NOAA
			 Source_Scale_Denominator:  unknown
			 Type_of_Source_Media:  CD-ROM
			 Source_Time_Period_of_Content
			      Time_Period_Information
			           Range_of_Dates/Time
				        Calender_Date:  July 24 - August 4, 1995
				        Time_of_Day:  various
			      Source_Currentness_Reference:  Dates of images
			 Source_Citation_Abbreviation:  AVHRR
		         Source_Contribution:  Sea Surface Turbidity
	       Process_Description:  
		    The USGS program AVHRRMAP7 was used to produce turbidity maps 
		    from the AVHRR data in level 1b format.  The image data were 
		    scaled into a turbidity range of 0 to 12.7 percent water
		    reflectance (8 bit).  Each image was cropped for the specific
		    viewing area and then hand navigated to a continental outline 
		    of the coast.  A raster landmask, the hurricane ground track, 
		    text annotation and the turbidity scale (color bar) were 
	  	    "burned" into each image.  Images were converted to JPEG and 
		    TIFF format.  The raster cell (pixel) values in the JPEG image
		    are radiometrically meaningless.  The colors in the image are
		    representative of turbidity only as they relate to the 
		    turbidity scale values.  The pixel values in the TIFF images 
		    are radiometrically correct.  As one byte integers they 
		    represent turbidity counts from 0-255 that encompass a 
	 	    turbidity range of 0 to 12.7 percent (i.e.,
		    %refdiff = (DN-1)/20 ).  Land is always represented as value 
		    254 (gray) and coastline and state boundaries as 0 (black). 
		    Areas of no data are also represented as value 0 while clouds
		    are represented by value 255 (white).
               Process_Date: 1997
Spatial_Data_Organization_Information
     Direct_Spatial_Reference_Method:  Raster
	  Raster_Object_Information
  	       Raster_Object_type:  Pixel
		    Row_Count:  450
		    Column_Count:  850
Spatial_Reference_Information
     Horizontal_Coordinate_System_Definition
          Geographic
	       Latitude Resolution:  1.3 km
	       Longitude Resolution: 1.3 km
	       Geographic_Coordinate_Units:  meters
               Map_Projection
		    Map_Projection_Name:  Albers Conical Equal Area
			 Standard_Parallels: 20 (1st) and 45 (2nd)
			 Longitude_of_Central_Meridian:  0
			 Longitude_of_Projection_Origin:  -80
			 Latitude_of_Projection_Origin:  30
			 False_Easting: 0.0 
			 False_Northing: 0.0
          Geodetic_Model:  unknown
	       Horizontal_Datum_Name:  unknown
	       Ellipsoid_Name:  Clark 1866
	       Semi-major_Axis: 6378206.4
	       Denominator_of_Flattening_Ratio:  Unknown
Entity_and_Attribute_Information
     Overview_Description
	  Entity_and_Attribute_Overview:  AVHRR Turbidity data
	  Entity_and_Attribute_Detail_Citation
	       Originator:  NOAA Coastal Services Center
	       Publication_Date:  1997
	       Title:  New Technologies for Coastal Mapping
		    Subtitle:  Hurricane Erin Turbidity
	       Geospatial_Data_Presentation_Form:  remote-sensing image
	       Publication_Information
		    Publication_Place:  Charleston, South Carolina
		    Publisher:  NOAA Coastal Services Center
Distribution_Information
     Distributor
          Contact_Information
	       Contact_Organization_Primary
		    Contact_Organization:  NOAA Coastal Services Center
		    Contact_Person:  John Brock
		    Contact_Address
			 Address_Type:  mailing and physical
		  	 Address:  2234 South Hobson Avenue
			 City:  Charleston
			 State_or_Province:  South Carolina
			 Postal_Code:  29405-2413
		    Contact_Voice_Telephone:  (803) 974-6200
		    Contact_Electronic_Mail_Address:  crs@csc.noaa.gov
		    Resource_Description:  CD-ROM
		    Distribution_Liability:  none
Metadata_Reference_Information
     Metadata_Date: 19970909
     Metadata_Contact
          Contact_Information
	       Contact_Organization_Primary
		    Contact_Organization:  NOAA Coastal Services Center
		    Contact_Person:  John Brock
		    Contact_Address
		         Address_Type:  mailing and physical
			 Address:  2234 South Hobson Avenue
			 City:  Charleston
			 State_or_Province:  South Carolina
			 Postal_Code:  29405-2413
		    Contact_Voice_Telephone:  (803)974-6200
		    Contact_Electronic_Mail_Address:  crs@csc.noaa.gov
     Metadata_Standard_Name:  FGDC Content Standards for Digital Geospatial Metadata
     Metadata_Standard_Version:  19940608