Adjacency and maxent_to_resne

[Leo]

Hello:

I am a new user of ConsNet. I am planning on running consnet with a
database
that I have. Because the type of my representartion input file will
be
arbitrary shape (section 2.6.3 in ConsNet Manual) I will also need an
adjacency file (section 2.6.5 in ConsNet Manual). I already have a
shapefile
for my representation file and I aldo created the actual
representation file
(it contains a total of 1104 cells). However, I do not know how to
create
the adjacency file and it seems like an extremely difficult thing to
do
because I will need to identify neighbours for every single cell, and
especially because I will need to identify the boundary shared between
every
single pair of cells. ¿Is there an easy way to create this file?

Also I am interested on using maxent_to_resnet so that I can create
my
ConsNet input files from my maxent output files. ¿Where can I get a
copy of
maxent_to_resnet?

Thank you very much in advance!

Leonardo Chapa.


Dr Leonardo Chapa Vargas
Inst. Potosino de Investigación Científica y Tecnológica
Dept. de Ciencias Ambientales.
Camino a la Presa San José No. 2055
Lomas 4a Sección
San Luis Potosí, SLP CP 78216
México.
Tel: 011 (52-444) 834 - 2000 ext 2027
email: lch...@ipicyt.edu.mx
(http://www.ipicyt.edu.mx)

[Michael Ciarleglio]

Hi Leo,

I will do my best to answer some of your questions. First, I think I
am familiar with your dataset (but I may be mistaken). This dataset
has 1104 hexagonal cells, and it has been mentioned before in the
ResNet discussion group by Diego Valencia:

http://groups.google.com/group/bbcl_software/browse_thread/thread/f705392e8ded5d16

At a recent ConsNet training course, Diego and I talked about how to
transfer this data set into the ConsNet format. Creating the
adjacency file is not easy, but if you have a ResNet input file that
contains the adjacency information, then you have all of the
information that you need. The ResNet input file contains ten columns
reserved for "adjacency information", which lists the neighbors for
each cell. From here, some creative Excel programming can re-arrange
the data into the ConsNet format. However, I think Diego might have
done this step already (if you are colleagues, you may want to check
with him).

As for the shared boundary between the cells, this information is
usually very difficult to manage. But for regular hexagonal cells,
the shared boundary between any two cells is always the same (i.e. the
length of one side of the hexagon).

maxent_to_resnet was developed at the University of Texas BBCL, but I
do not have a copy of this software (I will ask around and get back to
you). The final output of this program is not quite in the proper
format to use with ConsNet. I am currently working on a more direct
conversion program that will take Maxent output and convert it
directly to the ConsNet input file (with error checking).

Michael