3.3 The Georeference Window

3.3.1. The Site List

 Each GEOREFERENCE WINDOW maintains a Site List which is a list of georeferenced data sites that meet current query parameters. Current query parameters are defined in terms of three concepts:
  1. Query Region: A geographic region specified in terms of latitude and longitude.
  2. Query Expressions: Each georeferenced data category has a Query Expression. A Query Expression is an expression that results in a subset of data sites for a particular georeferenced data category (such as tree ring or ice core).
  3. Reconstructed Variables Only: If you selected this checkbox in the DATA SELECTION dialog, only sites with reconstructed variables are included in the Site List.
By choosing a set of georeferenced data categories, a background image, and the reconstructed variable status from the DATA SELECTION dialog, you begin to tailor the Site List. Then you further tailor the Site list by choosing the Query button or the Lat/Lon Region Button (description of these buttons follows).
When the GEOREFERENCE WINDOW is first displayed, the Site List contains all the data sites for each selected category that is within the geographic region of the background image, and has the appropriated reconstructed variable status. The Query Expression for each category is blank (NONE). A blank expression returns true for all data sites of its respective category.

3.3.2. Title

The title for the GEOREFERENCE WINDOW begins with "Georeference Window", followed by the name of the background image that you selected from the DATA SELECTION dialog. Next, if Reconstructed Variables Only is on, the word Recon will be displayed. At the very end is number. Any window, created through actions occurring in the GEO-REFERENCE WINDOW, will have this number as the final characters of its title.

3.3.3. Display Area

The display area displays the site markers of all the data sites in the Site List. Underlying the site markers is the background image that you selected.

3.3.4. Control Panel

The Control Panel lets you perform browse and visualization actions and change the appear-ance of the display area.

List Sites
When selected, this button creates a Site Listing Window that lists characteristics about all data sites in the Site List. See section 3.3.6. for details about the SITE LISTING window.

Query
This button allows you to define a query expression for each data category, thus modifying the Sites List. (See Chapter 4 for details about queries).

Lat/Lon Region
Allows you to select a Query Region using a cursor-controlled rubber band box. Click inside the box and drag in order to move the box. Click outside of the box in order to start over. Double click inside the box when the Query Region you desire is contained within the box.
This control is a toggle, once depressed it stays active. To turn off this control, select it again or select another toggle (Zoom In).

Plot Setup
This button allows you to set defaults for plotting data.

Legend
Displays information about site markers and the background image.

Overlays
This button allows you to select image overlays and graticules to be displayed in the Display Area over the background image.

ZOOM CONTROLS

Z (Zoom-In)
Allows you to select a region to zoom in on using a cursor-controlled rubber band box. Click inside the box and wish to invoke the zoom in operation.
This control is a toggle, once depressed it stays active. To turn off this control, select it again or select another toggle (Lat/Lon Region).

z (Zoom-Out)
Un-does the last zoom-in.

Fit-To-Window
Fills the Display Area to the maximum extent possible by zooming in or out.

Export Background Image
This button allows drag in order to move the box. Click outside of the box in order to start over. Double click inside the box when you you to export the background image in ASCII Special format or netCDF format to the file of your choice.

Background Image Memo
This button allows you to display the memo information about the background image.

3.3.4. Status Panel

The Status Panel at the bottom of the GEOREFERENCE WINDOW contain status information.

Region Shown
Displays the upper left coordinate and lower right coordinate of the geographic region.

Query Region
Displays the upper left and lower right coordinate of the specified
Status Line
Displays the current state of the mouse and information about mouse interaction.

Lat and Lon
These fields display the coordinates of the current mouse when the mouse is down or being dragged.

3.3.6. The Site Listing Window

Through a SITE LISTING window you can plot, export, search and sort on information about data sites, and view metadata about data sites.

3.3.6.1. Bringing Up the Site Listing Window

There are two ways to bring up a SITE LISTING window, you can select the List Sites button or double click on a site marker.
If you select the List Sites button, a SITE LISTING window is displayed. You can perform various operations (plot, export, and so on) on all data sites in the Site List (see section 3.3.1. for definition of Site List). The title of the SITE LISTING window is Map Listing.
When you double click the mouse on a site marker in the georeference window Display Area, a SITE LISTING window is displayed and you can perform operations on data sites within a four pixel search radius of the mouse. The title in this case is Marker Listing.
Note: In order to bring up the SITE LISTING window by this method, you cannot be currently zooming in or selecting a query region, as these operations put the mouse in special modes.

3.3.6.2. The Site Listing Window


Each row of the list corresponds to one data site.

Export
To export data sites to files on your hard disk, highlight the rows of the sites that you wish to export in any one of the columns that contain text. Then select the Export button.
For a complete explanation of exporting data sites see Chapter 6.

Search and Sort
These buttons allow you to search or sort through the list for specific site names, latitudes longitudes, and so on.

Select All
Highlights all rows, so all rows are selected for export.

Unselect All
Unhighlights all rows, so no rows are selected for export.

Site List Columns
A description of each column in the Site List follows.

Plot
To plot data for a site, click on the icon under the Plot column in its respective row. See Chapter 5 for details about plotting.

List
To list all data records for a site, click on the icon under the List column in its respective row.

Memos
To list memo information for a site, click on the icon under the Memos column in its respective row.

Category
Georeference data category to which the data site belongs.

Name
Descriptive name for the site. Select the down arrow to the left of the name to dis-play all variables in the data site.

Latitude
Latitude of the data site.

Longitude
Longitude of the data site.

File Name
File name of the data site on your hard disk.

Elevation
Elevation of the data site.

Contribution
Organization or person that contributed the data site.

3.3.7. Resizing and Moving Columns

You can resize and move columns in the SITE LIST Window or any other multicolumn dialog or window in PaleoVu.

To move a column:
Select the desired column heading. The column is now "picked up" and the cursor changes to a hand. While holding the mouse button down, drag the hand cursor so that it is between the two columns where you wish to drop the "picked up" column.

To resize a column:
Select the left or right edge of the heading of the column that you wish to resize. The cursor changes to a cross. While holding the mouse button down, drag the cursor until the column is the size that you want it to be, then release the mouse button.

3.3.8. Scrolling Columns

You can scroll columns in the SITE LIST Window or any other multicolumn dialog or window in PaleoVu. Use the scroll bars to move through the columns horizontally and vertically.