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. 
The shapefiles provided may also be viewed using other versions of ESRI
desktop software including their free software, ArcGIS Explorer
(http://www.esri.com/software/arcgis/explorer/index.html), or GeoMapApp
(http://www.geomapapp.org/) software, which 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 09cct03_04_location, 09cct03_04_area1,
09cct03_04_area1a, 09cct03_04_area1b,09cct03_04_area1c, 09cct03_04_area1d, 
and 09cct03_area2. All maps display 09CCT03 and 09CCT04 trackline navigation. 
The inset maps (shown on the location map as Area 1a, Area 1b, Area 1c, and Area 
1d)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 sub-bottom profile.  To access these images, open one
of the inset maps and click on the hyperlink button (the symbol is a lightening 
bolt)located on the tools bar.  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).


09cct03_shots_wgs:
Point layer of 09CCT03 Chirp 1,000-shot-interval locations

09cct03_sol_wgs:
Point layer of the start of 09CCT03 Chirp tracklines

09cct03_trkln_wgs:
Line layer of 09CCT03 Chirp trackline navigation

09cct03a_shots_wgs:
Point layer of 09CCT03A Chirp 1,000-shot-interval locations

09cct03a_sol_wgs:
Point layer of the start of 09CCT03A Chirp tracklines

09cct03a_trkln_wgs:
Line layer of 09CCT03A Chirp trackline navigation

09cct04_shots_wgs:
Point layer of 09CCT04 Chirp 1,000-shot-interval locations

09cct04_sol_wgs:
Point layer of the start of 09CCT04 Chirp tracklines

09cct04_trkln_wgs:
Line layer of 09CCT04 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