[GRASS-user] Re: TIN (Linear interpolation) from points

[TheGeographer]

Hi community,

I'm trying to convert my 3 vector points to raster points. The aim is to use
this raster points as input for r.surf.nnbathy.

I created a region with following command:
g.region --verbose vect=gfa_niep_work at PERMANENT nsres=1 ewres=1

This is the output of the region:

projection: 99 (Transverse Mercator)
zone:       0
datum:      potsdam
ellipsoid:  bessel
north:      5699460
south:      5698740
west:       3328920
east:       3329940
nsres:      1
ewres:      1
rows:       720
cols:       1020
cells:      734400


In the next step I used v.to.rast with following commands:

v.to.rast --overwrite --verbose input=gfa_niep_work at PERMANENT type=point
output=gfa_niep_rast use=attr column=werte

The metadata are these:

+----------------------------------------------------------------------------+
 | Layer:    gfa_niep_rast at PERMANENT        Date: Thu Mar 22 11:49:26 2012   
|
 | Mapset:   PERMANENT                      Login of Creator: danny          
|
 | Location: Test                                                           
|
 | DataBase: /home/danny/GIS                                                 
|
 | Title:    Labels ( gfa_niep_rast at PERMANENT )                              
|
 | Timestamp: none                                                           
|

|----------------------------------------------------------------------------|
 |                                                                           
|
 |   Type of Map:  raster               Number of Categories: 0              
|
 |   Data Type:    DCELL                                                     
|
 |   Rows:         720                                                       
|
 |   Columns:      1020                                                      
|
 |   Total Cells:  734400                                                    
|
 |        Projection: Transverse Mercator                                    
|
 |            N:    5699460    S:    5698740   Res:     1                    
|
 |            E:    3329940    W:    3328920   Res:     1                    
|
 |   Range of data:    min = 5.89  max = 5.89                                
|
 |                                                                           
|
 |   Data Source:                                                            
|
 |    Vector Map: gfa_niep_work at PERMANENT in mapset PERMANENT                
|
 |    Original scale from vector map: 1:1                                    
|
 |                                                                           
|
 |   Data Description:                                                       
|
 |    generated by v.to.rast                                                 
|
 |                                                                           
|
 |   Comments:                                                               
|
 |    v.to.rast input="gfa_niep_work at PERMANENT" layer=1 type="point" outpu\  
|
 |    t="gfa_niep_rast at PERMANENT" use="attr" column="werte" value=1 rows=4\  
|
 |    096                                                                    
|
 |                                                                           
|

+----------------------------------------------------------------------------+

My problem is now that i get only 1 raster point with the value 5.89 instead
of 3 points.
The correct range of the values should be min: 1.853 max: 5.89

What did i wrong?

Cheers

--
View this message in context: http://osgeo-org.1560.n6.nabble.com/TIN-Linear-interpolation-from-points-tp4627723p4644182.html
Sent from the Grass - Users mailing list archive at Nabble.com.