[GRASS-user] Conversion from point data to raster in GRASS
BABITHA REDDY
reddybabitha at gmail.com
Thu Dec 18 11:10:54 PST 2014
Hi,
I have to convert the vector(point) data into raster, I imported point data
into the GRASS and then used v.to.rast command to convert vector to raster
map, but the same problem: nothing is displayed on the display, and query
data is giving a value of zero in the map display.
If it is a problem with projection and region, please help me to resolve
this.
the point data's metadata is :
Name: RGP_Before_2014_Wagner_s_80_E_of_Hwy_80_E_of_HWY_20_2013_ |
| Mapset: battu
|
| Location: RedRiverValley
|
| Database: /home/shared/research/GRASSDATA
|
| Title:
|
| Map scale: 1:1
|
| Name of creator: battu
|
| Organization:
|
| Source date: Mon Dec 15 16:18:26 2014
|
| Timestamp (first layer): none
|
|----------------------------------------------------------------------------|
| Map format: native
|
|----------------------------------------------------------------------------|
| Type of map: vector (level: 2)
|
|
|
| Number of points: 10182 Number of centroids: 0
|
| Number of lines: 0 Number of boundaries: 0
|
| Number of areas: 0 Number of islands: 0
|
|
|
| Map is 3D: No
|
| Number of dblinks: 1
|
|
|
| Projection: UTM (zone 14)
|
|
|
| N: 46.98666723 S: 46.97957943
|
| E: -98.65789266 W: -98.66294363
|
|
|
| Digitization threshold: 0
|
| Comment:
|
|
and
g.proj -p gives me the following:
-PROJ_INFO-------------------------------------------------
name : Universal Transverse Mercator
proj : utm
datum : wgs84
ellps : wgs84
zone : 14
no_defs : defined
-PROJ_UNITS------------------------------------------------
unit : metre
units : metres
meters : 1
Could please anyone help me solve this issue. I need to generate raster
maps from given vector(point) data.
Thanks
On Tue, Dec 9, 2014 at 2:09 PM, Thomas Adams <tea3rd at gmail.com> wrote:
>
> Babitha,
>
> How did you do your vector point to raster interpolation; v.surf.bspline;
> v.surf.idw; v.krige,…? Did you use d.rast to display the raster map; do you
> have a MASK set; is your GRASS Region set correctly?
>
> Knowing your steps in more detail would be helpful…
>
> Tom
>
> On Tue, Dec 9, 2014 at 12:53 PM, BABITHA REDDY <reddybabitha at gmail.com>
> wrote:
>
>> Hi All,
>>
>> After converting a shape file(point) into raster using GRASS7, it is not
>> displaying the converted raster map. When i query the raster map it is
>> displaying the value as 0, even though there are values.
>>
>> Please help how to solve this problem
>>
>> Thanks
>>
>> _______________________________________________
>> grass-user mailing list
>> grass-user at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/grass-user
>>
>
>
>
> --
>
>
>
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