GeoMapApp© Help
Selecting and Viewing Dive Photos
By typing photo in the Search field of the Available Data window, you can easily find all available photo data:
Your search term goes here.
Be sure to scroll down to view all entries, including the NSF Focus Sites folder. Choose the dataset you wish to view by clicking it.
Then press OK at the bottom of the window.
In the step-by-step example below, we will load and view Alvin photographs from the East Pacific Rise at 9N. These photographs, like all Alvin and Jason photographs, are on a server hosted at WHOI and are accessed by GeoMapApp remotely.
To begin, select EPR_9_30N NDSF Dive Photos in the Ridge 2000 Study Sites folder and press OK to load. The EPR_9_30N shapefile is now listed in the left side of the Layers window; click it and the list of dives (platform = Alvin) within this shape file will appear in the attributes table (right hand side of window). Press 
to zoom to the bounding box of this shapefile.
Note that the background is fuzzy due to the amount of zoom required to show the tracks of the deep submergence vehicle, in this case, Alvin. The dive highlighted in the table is also highlighted in white in the Main Map Window.
You can select a track in map view and the corresponding dive will highlight in the attribute table. Once you select a dive, the open shape tool 
is activated and turns yellow. Clicking on the open shape tool opens the shape file for that dive so it now appears in the shape file table; a list of all Alvin photos for that dive appears in the attributes window. The location of each photo is now plotted as a circle in map view. Click on the open shape tool again to open the Photo Viewer window. Use the menu in the Photo window to choose among the vehicle's cameras. Use the arrows to move forward and backward through the dive's photos.
Values in the dive attributes table include time (yyyymmdd_hhmmss), depth (m), heading (degrees), altitude (vehicle height in meters above the seafloor) and external temperature (2 sensors, not co-calibrated, in degrees Celsius). Image URL is a field used by GeoMapApp internally.
You can now navigate through the dive by clicking on photo locations shown in your map view or using the arrows in the Photo Viewer window.
You can zoom in on a feature in a photo by clicking the mouse while holding the Ctrl button down. Similarly, Ctrl Shift Click will zoom out.
Doing more with Photos and Grids
You can open and view multiple shapefiles.
For example, go back to the Available Data menu, select an Alvin Imagenex grid. Then select the mkr119_composite. Click OK. Select it in the shapefile table, click on open shape tool to display a 1-meter resolution bathymetry grid which was created using the Imagenex sonar on Alvin. Now you are viewing the background bathymetry DEM and the high resolution bathymetry from the Marker_119 grid overlying it. Dive tracks and photo locations are plotted. You can now navigate through the dive by clicking on photo location circles shown in the Main Map window or by using the arrows in the Photo Viewer window.
Use the 
to close any shape files you are finished with.