vectplot
Sections
NAME
vectplot - Vector grid plotting
SYNOPSIS
vectplot [parameters...] filename
PARAMETERS
| Command Line | Resource | Default | Description |
|---|---|---|---|
| -h | help | No | Lists basic help information. |
| -df=filename | default | wxp.cfg | Sets the name of the resource file. |
| -na=name | name | the program name | Specifies the name used in resource file parsing. |
| -me=level | message | out2 | Specifies level of messages to be displayed |
| -fp=path | file_path | the current directory | Specifies location of database files. |
| -dp=path | data_path | the current directory | Specifies the location of the input raw data files. |
| -cp=path | con_path | the current directory | Specifies location of decoded/converted data files |
| -gp=path | grid_path | the current directory | Specifies location of gridded output files from WXP. |
| -ip=path | image_path | the current directory | Specifies location of output image files (.gif/,png) from WXP. |
| -nc=name_conv | name_conv | name.cnv or name_conv file | This sets which name convention file to use. |
| -mf=filename... | map_file | wxp.map | Specifies the name of the map database file. Multiple maps can be specified along with attributes to describe how to draw the map. |
| -cu=[hour] | current | none | This specifies to use current data files. |
| -ho=hour | hour | none | Specifies the exact hour that a data file is valid for. |
| -pd=domain | plot_domain | program dependent, mostly "us" | Sets the plotting domain |
| -pl=type | plot_type | Program dependent, normally user prompt | Available plot types:
|
| -sc=type | plot_scale | 1.0 | Specifies a scaling factor for all plotted text, symbols, vectors, etc. |
| -fm=format | format | None | Specifies the output format of data. |
| -pa=param[,param...] | parameter | none | Specifies addition parameters to program. |
| -dr=value[,value...] | draw | all | Specifies which part of the plot is to be drawn. |
| -la=type | label | Program defaults | Specifies the labels to be plotted around the plot. By default, labels are generated by the program and plotted above and below the plot. This resource overrides these labels. |
| -ci=value | con_interval | 0 | Specifies the contour interval to use in contouring grids. This can also be used to color code plotted data and vectors. |
| -cb=value | con_base | lowest contour value, max wind speed or 0 depending on application | Specifies the base value for color fill contours, and wind speed per grid distance. |
| -fl=font_file[,font_file...] | font_list | modern.fnt | Specifies a list of fonts to use in the plots. |
| -ct=color_table | color_table | wxp.clr | Specifies the color table to use in the plot. This maps color names to actual RGB color values. |
| -col=color[:attribute...] | color_label | white (black on inverse plots) | Specifies the text color for labels above and below the plot. |
| -cod=color[:attribute...] | color_data | green (for most programs) | Specifies the color for plotted data. |
| -com=color[:attribute...] | color_map | red (for most programs) | Specifies the color for background maps. |
| -coll=color[:attribute...] | color_latlon | magenta:st=dsh | Specifies the color for lat/lon lines. |
| -coco=color[:attribute...] | color_cont | white (black on inverse plots) | Specifies color for line contours |
| -cof=[value:]color[:attribute...],[value:]color[:attribute...],... -cof=filename |
color_fill | magenta, lmagenta, blue, lblue, cyan, lcyan, green, lgreen, brown, yellow, red, lred, dgray, lgray, white | Specifies the colors in the color fill contours. |
| color_cmap | |||
| -cocl=color[:attribute...] | color_clabel | white (black on inverse plots) | Specifies color for line contour labels. |
| -cofl=color[:attribute...] | color_flabel | black | Specifies color for color fill contour labels |
| -de=device[,parameters] | device | d for display | Specifies the output device. |
| -ti=title | title | The name of the program or the value of the name resource | Specifies the window title. |
| -ic | icon | off | Specifies whether to open window in iconified mode. |
| -bg=color | background | black | Specifies the background color of the window. |
| -ge=widthxheight[+x+y] | geometry | 640x512 (for windowed plots) | Specifies the window and paper geometry. |
| filename (positional) | filename | none | Specify input filename |
DESCRIPTION
This program plots vectors for a set of two existing grid files either created by WXP or preformatted GRIB files. WXP grid files can be created with the out_file resource being set on the contouring programs such as sfcgrid and upagrid. For multigrid files, additional information can be tacked onto the filename to denote which grid to use. If not specified on the command line, the filename will be prompted for. The filename syntax is:
filename[+time:level:var[:units]]
or
filename[#num[:units]]
where filename is the name of the grid file to use. If a relative path is used, the value of the grid_path is prepended to the filename. The filename can be "std" where standard input is used.
The extra information following the "+" or "#" defines which grid to use within a mulitgrid file. The value of num represents the sequence number of the grid in the file. Grids are numbered starting at 0 (zero). This number can be determined through a griblook listing.
The values of time, level, and var make it possible to specify the grid based on typical grid information. Possible values for each are:
- time: init,06,12,18,24,30,36,42,48,60,72,d3,d4,d5,d6,d7,d8,d9,d10
- level: sfc, sl (sea level), trop, wind, 1000, 850, 700, 500, 400, 300, 200, 100
- var: temp, rhum, pres, vvel, uwnd, vwnd, prec, lift
The unit specification allows the user to change the units of the grid before performing the math.
The user may also specify the input file using the in_file resource to specify a name convention tag and the current resource. To generate a loop, the num_hour resource can be specified. This will tell the program to loop through this number of hours.
The domain defaults to the domain of the first grid unless changed through the plot_domain resource. The domain can be interactively changed using the mouse once the plot has been generated.
The program will now open the graphics window and start processing the data. The user will be prompted for the output device. Then the grid file is opened and data read in. The background map will plot first unless the output is a color fill contour in which the map plots last. Next, the maximum and minimum of the grid are displayed for the user to pick an appropriate contour interval. Then, the contour or vector plot will display.
For vectors:
- vect -- vectors/arrows
- strm -- streamlines
- barb -- wind barbs
When the plot is complete, output can be saved to a GIF image file, spooled to the printer or the plot can be zoomed. When zooming the image, the plot will redraw to the new domain. It will also add more stations to the plot depending on the size of the domain. When the user is finished with the plot, the enter key can be hit which closes the window and returns the user to the variable prompt.
EXAMPLES
vector -pl=vect -in=2 -de=d uwnd.grd vwnd.grd
This produces a wind vector plot with vectors colored at an interval of 2.
FILES
SEE ALSO
Last updated November 2013