GeoMapApp© Help
Import Data Tables
Layers, Grids and Shapefiles- Select and view dive photos
To Import Shapefiles
First view the tutorial movie on importing shapefiles (Flash software is required), then follow the instructions below.
Select Import Shape Files from the File menu. They may be stored on your local disk or at a remote website URL.
A window opens allowing you to browse your local computer and select the shapefile you wish to load.
Click Open.
The Layers window opens. Click on the left hand entry to select it; the right side loads.
The Main Map Window will zoom to the data location unless a selection is needed from the
column on the right. In that case, select an entry. The 
button is lighted.
- Clicking opens the selected shape. One of two things will happen:
- A new shapefile will be added to the left-hand table, or
- A dialog (Grid Layer Dialog) will open for viewing/interacting with the data associated with the shape.
closes the selected shapefile.- If
is enabled, clicking it will open a browser page with additional information on the data. - Clicking
will zoom to the bounding box of the selected shape (right table). If the selected shape is a dimensionless point (type = 1, 11, or 21), the zoom will not do anything. Control+click on the selected shape to de-select it.
Click the Layers
button on the main tool bar to reopen/close the Layers dialog as needed. - The table on the left is a list of the shapefiles that have been imported. The table on the right is the attributes table for each shape in the selected shape file.
Step-By-Step Example: Import Grid
Your imported grid can be manipulated (colored, illuminated, contoured, profiled, saved, overlain with imported data points, etc.) in just the same way as the native GeoMapApp DEM tiles. Note that the imported grid is not merged with the GeoMapApp global DEM tiles – it is a geo-referenced overlay grid. An example: 
To import a GMT grid file
You may view a tutorial movie demonstrating how a .grd file is imported (requires Flash).
To import a gridded dataset in GMT’s netCDF .grd format go to the File menu and select Import Grid. Currently, only GMT-3 grids can be imported directly; choose Data Format Requirements to open a browser window containing conversion info.
Choosing Browse Your Disk brings up the Open window and allows you to browse your computer for any GMT .grd grid files you have. A mosaic formed of many gridded files can be imported together as a single shapefile by placing all the .grd files in a single directory (folder) and selecting them all at one time. The imported grid is then identified by the name of the directory/folder containing the files. Grids you wish to view individually should each have a separate folder/directory.
Select the grid (or grids) that you wish to import and press Open. A new window, called define projection, pops up.
In the Projection drop-down menu, select between Geographic and UTM grid projections. For a UTM grid, select the UTM zone. Hit OK. The grid is now read in to GeoMapApp and is indexed to each of the levels of nested resolution. The progress of this indexing is displayed in the Import Grid window.
When the grid has been indexed, an entry for it appears in the Layers window. If it is not selected, click on the entry to select it. It turns blue.
The grid loads and should automatically zoom to the grid region. 
The Layers window allows the user to manage multiple grids and shapefiles. By checking and unchecking the 'visible' boxes, image layers can be turned off and on. Click to dispose of a file you no longer wish to view.The info 
button opens a browser window displaying more information about the selected dataset or its source. The folder
icon opens the list of Available Data so that additional data may be added to your map window.
Click the yellow light bulb to bring up the Grid Options (palette tool) window:
Using this tool, you can change the coloring, vertical exaggeration and illumination used in the map window. For more information see Palette Tool.
The imported grid can be manipulated (colored, illuminated, contoured, profiled, saved, overlain with imported data points, etc.) in just the same way as the native GeoMapApp DEM tiles. Note that the imported grid is not merged with the GeoMapApp global DEM tiles – it is a geo-referenced overlay grid. Another example:
The imported grid can be colored, illuminated, contoured, profiled, saved, overlain with imported data points, etc., in just the same way as the native GeoMapApp DEM tiles. Note that the imported grid is not merged with the GeoMapApp global DEM tiles – it is a geo-referenced overlay grid.