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Subject: RE: question of atributes on gis
From: Francois Bousquet (f.bousquet@cgiar.org)
Date: Fri Feb 20 2004 - 04:15:18 CET
Hello Alejandro
Do you want to import data from an external file to Cormas or to export? You
say export but I guess you need to import data from an asc file to Cormas.
In the cormas Gis manual chapter dedicated to this topic we assume that you
do not have a model. So we first ask to create a model ( as this is the
cormas/GIS manual we do not say much about creation of the model). For
creation of a model refer to the tutorials.
Then, when the model is created with cells and points of views you will be
able to load asc files
see the section " Loading ASC files
The difference between ENV and ASC files is that ASC files can only hold
on... "
An asc file contains the values of one varaiable for the set of cells. So
the procedure request first to set the dimensions of the grid to the rigth
dimensions (in order to have as many cells as values in the asc file) and
then to associate the asc file with an attribute of the cell.
For instance for a given grid (set of cells) you will need to load two
layers, soilType.Asc, soilHumidity.asc. So you will have two attributes of
your Cell object in your cormas model, let's say sT and sH. When you load an
asc file you choose the name of the file soilType and then the attribute sT.
Then you do the same with soilHumidity and sH.
The points of view is something else. Points of views are programmed to
visualize the data once loaded into Cormas.
HTH
-----Message d'origine-----
De : owner-cormas@cirad.fr [mailto:owner-cormas@cirad.fr]De la part de
vega.a@javeriana.edu.co
Envoyé : vendredi 20 février 2004 00:24
À : cormas@cirad.fr
Objet : question of atributes on gis
Hi, I have a questions:
I´m working the tutorial of gis/cormas, and when i export the asc file,
i select my file and the program asks me which attribute for the
filename? .
the point is that i dont have any attribute,, where in cormas I can
program the points of view so that it can read the values of the asc
file.
I working raster dates... thanks
Alejo
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