ArcGIS Map Document Readme The map document and shapefiles used to create the trackline maps provided in this archive can be found in the arc.zip file located in the arc subfolder of the software folder located at the top level of the disc's file listings. The map document was created with PC-compatible Environmental Systems Research Institute (Esri) ArcGIS 10.1 software. The arc.zip file also contains an images folder, which stores .gif images of each trackline's subbottom profile. To access these images using ArcMap 10.1, open the map document, 12bim03_location.mxd or 12bim03_area1-4, then click on the hyperlink button (the symbol is a lightning bolt) located on the toolbar. Once this is activated, the tracklines will all change to blue, indicating they have hyperlinks. Selecting a trackline will open up the associated printable profile image. Shapefiles may also be viewed using other versions of Esri ArcGIS for Desktop software including their free software, ArcGIS Explorer (http://www.esri.com/software/arcgis/explorer/index.html); however, the hyperlink feature is disabled when using this software. The map document displays trackline navigation, the start-of-line (green dots), and 1,000- shot-interval locations (black dots) along each line. The Points to Lines ArcScript, downloadable at http://arcscripts.esri.com/details.asp?dbid=12702, was used to create the trackline layer. The list below describes the shapefiles provided with the ArcGIS map document. Metadata are available as FGDC-compliant text and XML documents (used by ArcCatalog). *Note: ArcMap 10.1 .mxd files are not backward compatible; however, the shapefiles can be viewed using earlier versions of ArcGIS software. 12bim03_trkln: Line layer of 12BIM03 chirp trackline navigation 12bim03_shots: Point layer of 12BIM03 chirp 1,000-shot-interval locations 12bim03_sol: Point layer of the start of 12BIM03 chirp tracklines