[GRASS-user] RE: 3D Streets Data

[Matthew Pulis]

Hi again,

 

I am really sorry I am sending again but I have tried to read many documents
on how to use v.drape all gave me the same conclusions I did here. 

 

Is there some extra information you might require that I make available in
order to get some knowledge on this situation please?

 

Also anyone can suggest how I can work out my problem without using v.drape
please?

 

Thanks again J

 

Matthew

 

From: Matthew Pulis [mailto:mpulis at gmail.com] 
Sent: Saturday, January 05, 2008 6:33 PM
To: 'grass-user at lists.osgeo.org'
Subject: 3D Streets Data

 

Hi,

 

First of all Happy New Year to all on the list J

 

I am trying to build a 3D Street Network, thus where the streets have
elevation so I can do routing depending on slope level.

 

I am using the GRASS Book Dataset of North Carolina. 

 

I tried to combine : streets_wake and elev_state_500m layers together, using
the v.drape : 

v.drape in=streets_wake rast=elev_state_500m method=bilinear out=streets3d

 

But to no avail. This is the v.info on streets3d :

 

|   Number of lines:        49746           Number of islands:    0
|

 |   Number of boundaries:   0               Number of faces:      0
|

 |   Number of centroids:    0               Number of kernels:    0
|

 |
|

 |   Map is 3D:              1
|

 |   Number of dblinks:      1
|

 |
|

 |         Projection: Lambert Conformal Conic
|

 |               N:   258102.57210146    S:   196653.34855345
|

 |               E:   676816.24830376    W:    610869.3848495
|

 |               B:       49.16141063    T:      156.87280191
|

 

The result of streets3d ended up exactly as streets_wake without any
altitude data.

 

Any idea how I can do this endeavour please? I am planning the dataset for
routing using pGRouting afterwards.

 

Thanks and regards

 

Matthew

 

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