Roberto:
Thank you for answering, my problem is that I need to rasterize the vector file in order to calculate an MDT. The vector source file was cutted according to geographic reference, so when I putted it in raster format it generates a set of columns to fill the rectangle. This is the reason why I need to transform first UTM coordinates into geographic coordinates to make it a perfect rectangle, and calculate MDT without errors.
An other clue: when I transform the file (UTM to geographic) and I try to measure distance (whit measure tool) it seems to take degrees as meters, so the result is too small (in meters)
I hope you can help me
Thanks in advance
Rocio Castillo
"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
Hi Rocio
I don t know if I understood your problem, anyway I try to give you a
suggestion.
When you import in Ilwis a georeferenced map from ArcView, you can only
see the coordinate of this map in X,Y coordinate system. To give the
right coordinate system to this map you can create a coordinate system
projection in which you can select a projection, an ellipsoid and a
datum. Then you have to select the properties of the map and give this
new cordinate system to it. When you open the map you will see, in your
case, the UTM and geographic coordinate as well. I mean that you don t
need to transform from UTM to geographic coordinate, because you can
have both at the same time.
bye
Roberto Iovinelli
>
> If somebody could help me I would appreciate it. I am trying to impo
rt elevation isolines from ARC/View into Ilwis 2.2. Inside ilwis I trans
formed them from UTM projection to geographic coordinate. The file cover
s an small area so, in order to rasterize it I have to create a georrefe
rence but I can t set the pixel size adequately. I think the problem is
because although I made the transformation (UTM/LATLON) when I measure
distance in the map the result is minimum (0.06 m) when actually it is 5
km length; I don t understand why I can t mesure distances correctly.
> Thanks in advance
>
> Rocio Castillo
>
>
> Departamento de Geograf a y Ordenaci n Territorial
> CUCSH, Universidad de Guadalajara
> Av. de los Maestros y M. B rcena 1er. piso
> Sector Hidalgo
> Tel 3819-3381, 3819-3386
> Fax 3819-3387
> email [EMAIL PROTECTED]
>
>
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Departamento de Geograf a y Ordenaci n Territorial
CUCSH, Universidad de Guadalajara
Av. de los Maestros y M. B rcena 1er. piso
Sector Hidalgo
Tel 3819-3381, 3819-3386
Fax 3819-3387
email [EMAIL PROTECTED]
Do You Yahoo!?
New! SBC Yahoo! Dial - 1st Month Free & unlimited access
