GEMPAK Online Tutorial > NPROGS > NMAP2
9.0.0 NMAP Data Selection
The NMAP2 data selection window can be brought up by clicking the
data icon button at the top of the display panel, by clicking the
"Data Source" option from the "File" menu pulldown, or by using the
right mouse button within the data display window.
- The Loop Frame which will be used for the display
can be selected.
- ROAM sets the magnification/viewport into
the display window.
- You can customize your map display now using the
map selection icon.
Selecting Data
Choose the type of data you want to display from the "New Source"
option. The data source options look like:
By selecting a data type, additional options are provided
for the data source and parameter display.
Click the "Accept" button, and the data dialog will update with the
times available and default frames selected for plotting as shown below.
After the desired time range and interval is selected, use "Load"
to display the selected data products.
Defining Display Characteristics
The Dominant Source is the data field which defines the times
used in the displayed data, and defaults to the first data set
selected. Additional data fields may be added to the product
display. The dominant field defines the time step between each
loop frame, and the times for which the frames are presented.
Since different data sets are available at differing intervals and
time resolutions, the dominant data source provides the mechanism for
time matching for other displayed fields.
Use the dominant source selection to define
which data set will be the dominant source:
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When an image is the dominant frame, you may choose to have the
display automatically update as new data arrives.
Select the "New Source" button for each data set you wish to display.
Use the "Clear Source" button to reset all data selections.
To change a selected data source, first select the desired field
from the "Data Source" selector, then choose "Modify Data Source".
The data selction window will reappear and the desired data set may be chosen.
The "Edit Source" button allows the user to define the
plotted parameters for each data source as shown below.
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Data set time selection
The number of frames currently selected for looping is shown in the
"Total Frames" block. You can increase or decrease the number of
frames selected by using the slider immediately to the right. Or,
drag the end of the time selection box to increase or decrease the time range:
You can also shift the frame range by clicking and holding the left mouse
button down as the mouse pointer is over the time slection box:
You can skip loop frames at fixed intervals using the "Skip Factor"
object. Alternatively, you can skip random frames by clicking the displayed
time within the time bar:
By default, the data selection window uses the current system time to
display available data sets, and the predefined $GEMTBL/config/datatype.tbl
time range and interval for the specified dominant source. The time window
can be configured through the "Range/Int" (Range and Interval) tool window
to specify the date, time range and displayed interval of the data source.
GEMPAK Online Tutorial > NPROGS > NMAP2
