LBFextract

Files

 The link base emission format are refered to User's Guide For the Urban
Airshed Model, EPA-450/4-90-007D. Users may read through the very begining of 
the C codes provided to get an idea how the data is constructed.
	Input Data: Name of the LBF File   
	Output data:Field 1-D 6-Space 1-Vector IRREGULER
		    Field 1-D 3-Space 1-Vector IRREGULER
		    Field 1-D 3-Space 1-Vector IRREGULER
                    Field 1 contains link data
			(x, y, z) of the starting point
                        (x, y, z) of the ending point 
                        value of the link
		    Field 2 contains (x, y, z, value) of the start point
		    Field 3 contains (x, y, z, value) of the end point
        This module belongs to a group of modules submitted to the Inter-
national AVS Center for displaying points, lines and polygons over a map of the
United States. The group of the modules includes:
        AFSextract:             Extracting AFS Format Data
        AMSextract:             Extracting AMS Format Data
        LBFextract:             Extracting Link Base Mobile Data
        field_to_points:        Plot 3D points with color mapping
        field_to_lines:         Plot 3D lines with color mapping
        field_to_polygons:      Plot 3D polygons with color mapping
        getmap:                 Plot political boundary of states and
                                countys in the United State
        geomreset:              Reset and normalize the geometry viewer
                                automatically
        zoomer:                 A driver to allow zoom in and out to a
                                particular geographical area
        resetlegend:            To reset the position and size of ithe color
                                legend if used
        minmax:                 To find out the min and max value of a field
        An example network is shown below:
                                LBFextract
                                   |
                                write field
	Contact person: Jeff Wang, MCNC/NCSC, (919)-248-9242
This is one of a suite of modules we used to plot the emission 
data for the state of North Carolina.  This group of modules allows 
displaying points, lines and polygons over a map of the United States. 
The module suite is stored as a group in a compressed tar file at the
International AVS Center, with some sample networks and datasets included.
You may find it easier to access the modules this way.  The compressed tar
file is approximately 1.2MB in size, and can be found via anonymous ftp to
avs.ncsc.org, in /sample_data/avs_data/Wang_GIS_mods.tar.Z.