Geophysical Mapping of Oyster Habitats in a Shallow Estuary; Apalachicola Bay, Florida
This appendix describes the data collected for this project, where they are located, and how to access them depending on the software you have. The primary data format for vector data are personal geodatabase feature classes in the Universal Transverse Mercator (UTM) coordinate system, Zone 16. As a secondary format for users without access to ArcGIS 9.0, all feature classes in the geodatabase are also delivered as individual shapefiles in Geographic projection. The primary format for distribution of raster data are ESRI raster and GeoTIFF. All spatial data are distributed with FGDC compliant metadata.
The organization and schema of data in the geodatabase is based on the ArcMarine data model developed by the ArcMarine Working Group (http://dusk2.geo.orst.edu/djl/arcgis/).
Some of the feature classes in the geodatabase are linked to tables through relationship classes that maintain data integrity and establish joins between spatial data and table objects. These relationships are established as a basis for joins so the user can easily see which features are related to which tables (see fig. 16). The relationships tab in the feature class properties also displays which table objects are related to the feature. The figure below (fig. 17) illustrates that the SurveyLines feature class participates in three different relationships that can be used as joins.
These relationship classes can also be used as a basis for a select query. For example the SurveyLines feature class has tracklines from two different surveys (05001 and 06001), and two different MeasuringDevices (swath bathymetry and sidescan sonar). If a user wants to see what survey an individual surveyline is from using the inquire tool, the identify popup box automatically shows that line l202f1 was collected during 05001 (fig. 18). This is the information stored in the SurveyInfo table that is linked by a relationship class to the Surveylines feature class.
You can also use these attributes in a definition query to display only features with certain attributes. For example, a user might want to display only the bathymetric surveylines from the survey rafa05001 (SurveyID = 1). Using the Definition Query tab in the feature class properties, you can build a query based on SurveyID attribute (fig. 19).
The general organization of spatial data on this DVD-ROM is listed below.
Vector Data- The vector data are stored and delivered together in a single personal geodatabase. A user with ArcGIS 9.1 or higher can download the single zip file below and access all the vector data and associated metadata. A user without ArcGIS 9.1 or higher can access the layers stored in the personal geodatabase as individual shapefiles in geographic coordinate system.
The raster data are stored and delivered outside and separate from the personal geodatabase in either GeoTIFF or ESRI Grid format. All raster data are in the UTM Coordinate system. Four raster data layers are available in geographic coordinates system denoted by the “_geog.zip” in the download column.
Click on each figure for a larger image.
To hyperlink these seismic image profiles with the seismic tracklines use the "Image Title" attribute in the feature class to use as the hyperlink field.
Title | Figures | 1-Introduction | 2-Data Collection and Processing | 3- Geologic Interpretation | 4-References | 5-Maps | Spatial Data | Acknowledgments