Identification_Information: Citation: Citation_Information: Originator: VeeAnn A. Cross Publication_Date: 2005 Title: MPEG Animation of the Northern Portion of the Pulley Ridge Study Area Online_Linkage: http://pubs.usgs.gov/of/2005/1089/data/visualization/northernpulley.zip Larger_Work_Citation: Citation_Information: Originator: VeeAnn A. Cross Originator: David C. Twichell Originator: Robert B. Halley Originator: Kate T. Ciembronowicz Originator: Bret D. Jarrett Originator: Erika S. Hammar-Klose Originator: Al C. Hine Originator: Stan D. Locker Originator: Dave F. Naar Publication_Date: 2005 Title: GIS Compilation of Data Collected from the Pulley Ridge Deep Coral Reef Region Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-1089 Publication_Information: Publication_Place: Woods Hole Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2005/1089 Description: Abstract: Pulley Ridge is a series of drowned barrier islands that extends almost 200 km in 60-100 m water depths. This drowned ridge is located on the Florida Platform in the southeastern Gulf of Mexico about 250 km west of Cape Sable, Florida. This barrier island chain formed during the initial stage of the Holocene marine transgression. These islands were then submerged and left abandoned near the outer edge of the Florida Platform. The southern portion of Pulley Ridge hosts zooxanthellate scleractinian corals, green, red and brown macro algae, and a mix of deep and typically shallow-water tropical fishes. This reef community is in unusually deep water, and its extent and the controls on its distribution were unknown. To address these questions scientists from the U.S. Geological Survey Coastal and Marine Geology Program in cooperation with scientists from the University of South Florida Department of Marine Sciences have completed a detailed mapping of the southernmost 35 km of Pulley Ridge. The area was mapped using multibeam bathymetry, sidescan-sonar imagery, and high-resolution seismic-reflection profiling to define the geologic framework on which the reef is established. Submersible dives, remotely operated vehicle (ROV) transects, and transects of bottom photographs and video were collected to identify the corals and to map their distribution. This extensive suite of data has been compiled and preliminary analysis of the data suggests that the reefs are not tied to the ridge system, but instead are more broadly distributed. Whether reef distribution is controlled by oceanographic conditions or by subtle differences in the substrate that overlies the barrier island system is unclear, and are topics of continued research. Purpose: This animation is provided to provide the 3D visualization relating the SeaBOSS bottom photographs with the high-resolution bathymetry collected in the study area. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2005 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -83.792254 East_Bounding_Coordinate: -83.591486 North_Bounding_Coordinate: 25.000776 South_Bounding_Coordinate: 24.671257 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: animation Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: OF 2005-1089 Theme_Keyword: Open-File Report Theme_Keyword: reef Theme_Keyword: bathymetry Theme_Keyword: SeaBOSS Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Woods Hole Science Center Theme_Keyword: MPEG Theme_Keyword: Fledermaus Theme_Keyword: fly-through Place: Place_Keyword_Thesaurus: General Place_Keyword: Florida Place_Keyword: Florida Shelf Place_Keyword: Gulf of Mexico Place_Keyword: North America Place_Keyword: Pulley Ridge Place_Keyword: United States Access_Constraints: None. Use_Constraints: The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2251 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535 Data_Quality_Information: Lineage: Process_Step: Process_Description: High-resolution swath bathymetry was converted into a Fledermaus file format (data object) with a colormap applied using the IVS DMAGIC software package. Process_Step: Process_Description: An ArcView avenue script was used to derive the x and y corner point locations of a SeaBOSS bottom photograph if the photograph was made vertical. This was done by taking the polyline shapefile of the photograph locations to get the direction of travel. Since this polyline shapefile was generated from the point shapefile of photograph locations, each vertex in the polyline represents a photo location. A graphic line, perpendicular to the direction of travel of the polyline, was generated at each vertex of the SeaBOSS polyline. The length of this graphic is a constant value as defined in the script. For this work, the length of the graphic line was set to 200m. This in-house generated script is called createtransectsatvertices.ave. Process_Step: Process_Description: These graphic lines were then converted to a polyline shapefile. Process_Step: Process_Description: These polylines were then rotated 45 degrees using the in-house script vac_rotatepolyline.ave. Process_Step: Process_Description: The script track_startend.ave was then used to add the start and end points (x and y) to each polyline. Other attributes that correspond to each photo location were incorporated into this shapefile. These include the bottom photograph filename corresponding to each line, approximate depth at the center of each transect line, and an upper z-limit (10 meters above the seafloor elevation). Process_Step: Process_Description: This table of information was then exported to a delimited text file and reformatted using an awk script. The new format incorporated the command line version of the IVS vertical image creator. This command requires the following information: mkvimage < -in > [-out ] < -start xval yval > < -end xval yval > < -zrange zmin zmax > For use within a script running from a command prompt, the text "cmdop" needs to be added at the beginning of the line. This program takes as input an image file that represents a vertically oriented image plane along with the starting and ending locations and z-range. It then creates a Fledermaus formatted SD file representing a vertical slice that can be used in a Fledermaus 3D scene. Process_Step: Process_Description: A subset of the total number of SeaBOSS bottom photographs was selected. These points were also extracted from the photopnts shapefile into a separate shapefile, while the remaining points were left in a separate shapefile. Process_Step: Process_Description: The study area was roughly divided into 3 areas: southern, central and northern. This was necessary due to the large number of vertical images that were going to be used. The bathymetry SD files and the point shapefiles representing the selected images and remaining images were loaded into Fledermaus. In addition, the vertical image files corresponding to the northern portion of the study area were also loaded. The following projection parameters were used for the scene: near clipping plane: 0.01 far clipping plane: 250000 scene pushback: 250 global scene scale: 28 In addition to the data files, a polyline shapefile was also added to the scene which was to represent the approximate flight path for the animation. A vertical exaggeration of 18 was applied to the scene. This exaggeration also applied to the vertical images. The initial vertical extent of each image was 10 meters, but with this additional exaggeration applied, the images remained proportional based on a 200 m width for each image. Process_Step: Process_Description: Using a Polehemus Isotrak 3D mouse (bat), a flight path was recorded in Fledermaus. Process_Step: Process_Description: IVS's Movieclient software was used to smooth the resulting flight path and create an MPEG-1 file based on the flight path and the corresponding scene file. Within movieclient, the anti-aliasing parameter was set to 3, with the render magnification parameter set to 2. Process_Step: Process_Description: VideoMach was then used to combine audio and video. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2251 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Resource_Description: Downloadable Data Technical_Prerequisites: The user must have an installed program, such as Windows Media Player or RealPlayer, capable of playing an MPEG animation file to view this visualization file. Metadata_Reference_Information: Metadata_Date: 20050513 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2251 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile