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"Convertir une ligne 3D en raster" avec ArcHydro

UliSchmidt1

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Bonjour,<\/P>

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travaillant sur ma thèse de licence, j'ai un nouveau problème. J'ai essayé de convertir ma ligne 3D issue de la fonction "Point TSValue to 3D Line" en un raster de ligne en utilisant "Convert 3D Line to Raster". Mais je n'obtiens qu'une partie de la ligne 3D sous forme de raster de ligne, l'autre partie de la ligne est manquante dans le raster. C'est comme si la fonction coupait le cours d'eau, ne convertissait qu'une partie et jetait l'autre.<\/P>

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Il y a un mois, j'ai essayé avec d'autres données et tout a fonctionné. Quelqu'un aurait-il une idée ?<\/P>

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Merci pour votre aide.<\/P>

Uli Schmidt<\/P><\/BODY><\/HTML>

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MarkBoucher

First thing I would check would be the processing extent. If it does not cover your work area, results will get cut off.

Set them at : Geoprocessing>Environments>Processing Extent>Choose a dataset that covers your project area.

UliSchmidt1

I have to start "Convert 3D Line ro Raster" from the Modeller from "Stream WSE from Point WSE Measurements" because it doesn't work if I start it from the ArcHydro Toolbox. But how can I choose the Processing Extent in the Modeller?

UliSchmidt1

Ah I found it, but it didn't work. I chose the extent of the DEM which covers my work area, but the function converts only the same part as before.

MarkBoucher

This is a silly question. Sometimes the default color ramp goes from black to white. Maybe it's there but can't see it because it has no color. Have you tried changing the symbology of your new layer?

UliSchmidt1

Why is this a silly question? Yes, the default color ramp goes from black to white, but I already had this idea...... I think it was the first I had. I already changed the color ramp, but there was no difference.

I also used the info tool to look if there are pixel I can't "see" but it says "NoData".

MarkBoucher

Next thing to check: Make sure the projections are the same on all datasets. If the projection is different or not defined, you can get strange results.

UliSchmidt1

I checked this before and the DEM had no projection. So I used a version of the DEM that has the right proection, but the result was the same. So this isn't the point.

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