db9_ITPs ===============================================
Resampler version '##'.0
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Aim --------------------------------------------------------------------------------------------
i. To produce an interpolated grid of seabed bottom type information, with suppression of unwanted noise spikes while leaving the real natural variability in place.

Legal status --------------------------------------------------------------------------------------------
i. The software is research grade code. No warranty is given as to it's fitness for any purpose.

ii The code is released under GNU Public Licence, which means that the code is public and open, and available to others to use and improve. ("www.gnu.org/copyleft/gnu.html")

iii. Release of the code was requested by the Office of Naval Research (ONR) Coastal Geosciences group.

Technical status --------------------------------------------------------------------------------------------
i. The code has been validated in function by tests on data from 
   the Adriatic Sea and offshre New Jersey (bathymetry), and synthetic data.

ii. Documentation is partial. It will be improved in future versions.

iv. All input coordinates must be in decimal degrees, as is the output. 

Download content --------------------------------------------------------------------------------------------
i. This readme file - readme.txt
ii. Zipfile of Fortran code, written for F77
iii. The run command file for Windows/DOS - resample.bat

Run instructions --------------------------------------------------------------------------------------------
i. Prepare the data, in the form of a dbSEABED *_WWD.txt file.

ii. Run the programs in sequence:
    a. dataex (compile: f77 -o dataex dataex.f): 
Program to read in the dbSEABED file format, eliminate unwanted data (e.g., outside    geographic region, null grain size, suspect data key), and output fields of interest.

    b. cull (complile: f77 -o cull cull.f): 
    A program to cull extracted dbSEABED data table for seafloor samples within 0.5 m of the seafloor, and average redundancies at same location.  Also - utilize a gridded bathymetry map in ArcGIS ascii grid format to fill in missing depth values.

    c. db_var (compile: f77 -o db_var db_var.f): 
Program to compute a binned semivariogram from data file, and output by lag,  semivariogram value, and number of data in each bin.  This is applied after the data file output from cull.f is run through ArcGIS to select those which fall within defined polygons.

    d. plotsv (compile: make -f make_plotsv in plotsv.dir): 
Program to plot up to 5 semivariograms computed via db_var and overlay von Karman functional forms.  Employs ghostscript to view post script plots.

    e. svinv (compile: make -f make_svinv in svinv.dir): Program to invert semivariogram computed via db_var for best-fit von Karman parameters.  Also plots results.  Employs ghostscript.

    f. resample (compile: make -f make_resample in resample.dir).  This is the resampling program I showed you in detail.  To run this you need to add an uncertainty value to each of the mean grain size values input.

   
v. Output files:
##

Support -------------------------------------------------------------------------------------------------------
    john.goff@utig.edu
    http://www.ig.utexas.edu/people/staff/goff/

Download
    ##http://instaar.colorado.edu/~jenkinsc/dbseabed/resources/resample/resampler.tar

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21 Sep 2007