ArcGIS Project Readme

The map documents and shapefiles used to create the trackline maps
provided on this disc 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.
The map documents were created with PC-compatible ESRI ArcGIS 9.3 software. 
Shapefiles may also be viewed with other versions of ArcGIS, ArcView, or public 
domain software ArcExplorer 
(http://www.esri.com/software/arcexplorer/index.html). GeoMapApp 
(http://www.geomapapp.org/) software is compatible with all 
platforms. The Points to Lines ArcScript, downloadable at 
http://arcscripts.esri.com/details.asp?dbid=12702, was used to create the 
trackline layer.
	
The map documents (.mxd) are named 08cct01_location, 08cct01_area1, 
08cct01_area2, 08cct01_area3, 08cct01_area3a, and 08cct01_area3b. 
All maps display 08CCT01 trackline navigation. The inset maps (shown on the 
location map as Area 1, Area 2 and Area 3) also show the start of lines
(green dots) and 1,000-shot-interval locations (black dots) along each line.

The arc.zip file also contains an images folder, which stores .gif images of 
each trackline's sub-bottom profile.  To access these images; open one
of the inset maps, click on the hyperlink button (the symbol is a lightening 
bolt)located on the toolbar.  Once this is activated, the tracklines will all 
change to blue, indicating they are hyperlinks.  Selecting a trackline will open 
up the associated printable profile image.

The list below describes the shapefiles provided with the ArcGIS project.
Metadata are available as FGDC-compliant text, HTML (viewable with any Web 
browser),and XML documents (used by ArcCatalog).



08cct01_shots_wgs:
Point layer of 08CCT01 Chirp 1,000-shot-interval locations

08cct01_sol_wgs:
Point layer of the start of 08CCT01 Chirp tracklines

08cct01_trkln_wgs:
Line layer of 08CCT01 Chirp trackline navigation


2007_MissAl_shoreline
Polygon layer of the Mississippi and Alabama shorelines derived from USGS
2007 Experimental Advanced Airborne Research Lidar (EAARL) survey Bare Earth 
Digital Elevation Maps (DEMs) 

gulf_states_shoreline_wgs
Polygon layer of the Gulf States shoreline derived from USGS
2007 Experimental Advanced Airborne Research Lidar (EAARL) survey Bare Earth 
Digital Elevation Maps (DEMs) 

interstates_wgs:
Line layer of U.S. interstate highways and major roads derived from 1:5,000,000
ESRI vector digital data 

roads_wgs:
Line layer of major U.S. roads derived from 1:2,000,000
Digital Line Graph (DLG) data produced by the USGS