Boundary-Line to Grid Converter (bln2grd)
I have written a program for the conversion of a vector datafile
into a regular grid file
(from the bln-file format
(discription)
into the
Surfer (TM by Golden Software) ASCII grid file format).
Please take a look at the
example input data set
for explanation.
The bln-file has allways a first entry containing the number of
following coordinates, after this first set there can follow an
arbitrary number of other coordinate sets (also starting with the
number of them).
It is a polyline or polygon (then the first and last data point are
equal) description.
With the help of this program you can also convert a shape-file into
a grid file. In this case it is necessary to convert the shape-file
first into the bln-format. This is possible for example with the
program Surfer (TM). An other set of helpful tools is the
shapelib.
download the java source code version of Bln2grd
download the compiled java version of Bln2grd
This java version is despite of the graphical capabilitis of the java programming language a pure console version. Please contact me if you need a version with a graphical user interface!
download the Fortran77 version of Bln2grd
example datafile for the bln-format
For testing purposes you could check the africa-data set (by http://ioc.unesco.org, to my knowledge unfortunately not available anymore).
This is a result on a 500 x 500 grid.