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The important information is the region settings. Please post the
output of g.region -p.<br>
Also r.info on the resulting raster will help.<br>
<br>
Also note, as Tom mentioned, that you probably want to *interpolate*
a continuous raster from the point values. Converting a point vector
directly to a raster with v.to.rast will give you individual raster
pixels with some value, and all the rest of the raster pixels with
zero (or null).<br>
<br>
<div class="moz-cite-prefix">On 12/18/2014 09:10 PM, BABITHA REDDY
wrote:<br>
</div>
<blockquote
cite="mid:CA+nEKedHNj1EpF3m1qUByjRnbJJuK4se08uSGPLnfy5VsGusgQ@mail.gmail.com"
type="cite">
<div dir="ltr">Hi,
<div>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.</div>
<div>If it is a problem with projection and region, please help
me to resolve this.</div>
<div>the point data's metadata is :</div>
<div>
<div>Name:
RGP_Before_2014_Wagner_s_80_E_of_Hwy_80_E_of_HWY_20_2013_ |</div>
<div> | Mapset: battu
|</div>
<div> | Location: RedRiverValley
|</div>
<div> | Database: /home/shared/research/GRASSDATA
|</div>
<div> | Title:
|</div>
<div> | Map scale: 1:1
|</div>
<div> | Name of creator: battu
|</div>
<div> | Organization:
|</div>
<div> | Source date: Mon Dec 15 16:18:26 2014
|</div>
<div> | Timestamp (first layer): none
|</div>
<div> |----------------------------------------------------------------------------|</div>
<div> | Map format: native
|</div>
<div> |----------------------------------------------------------------------------|</div>
<div> | Type of map: vector (level: 2)
|</div>
<div> |
|</div>
<div> | Number of points: 10182 Number of
centroids: 0 |</div>
<div> | Number of lines: 0 Number of
boundaries: 0 |</div>
<div> | Number of areas: 0 Number of
islands: 0 |</div>
<div> |
|</div>
<div> | Map is 3D: No
|</div>
<div> | Number of dblinks: 1
|</div>
<div> |
|</div>
<div> | Projection: UTM (zone 14)
|</div>
<div> |
|</div>
<div> | N: 46.98666723 S:
46.97957943 |</div>
<div> | E: -98.65789266 W:
-98.66294363 |</div>
<div> |
|</div>
<div> | Digitization threshold: 0
|</div>
<div> | Comment:
|</div>
<div> | </div>
</div>
<div>and </div>
<div>
<div>g.proj -p gives me the following:</div>
<div>
</div>
<div>-PROJ_INFO-------------------------------------------------</div>
<div>name : Universal Transverse Mercator</div>
<div>proj : utm</div>
<div>datum : wgs84</div>
<div>ellps : wgs84</div>
<div>zone : 14</div>
<div>no_defs : defined</div>
<div>-PROJ_UNITS------------------------------------------------</div>
<div>unit : metre</div>
<div>units : metres</div>
<div>meters : 1</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div>Could please anyone help me solve this issue. I need to
generate raster maps from given vector(point) data.</div>
<div><br>
</div>
<div>Thanks</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Tue, Dec 9, 2014 at 2:09 PM, Thomas
Adams <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:tea3rd@gmail.com" target="_blank">tea3rd@gmail.com</a>></span>
wrote:
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Babitha,
<div><br>
</div>
<div>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?</div>
<div><br>
</div>
<div>Knowing your steps in more detail would be helpful…</div>
<div><br>
</div>
<div>Tom</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">
<div>
<div class="h5">On Tue, Dec 9, 2014 at 12:53 PM,
BABITHA REDDY <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:reddybabitha@gmail.com"
target="_blank">reddybabitha@gmail.com</a>></span>
wrote:<br>
</div>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div class="h5">
<div dir="ltr">Hi All,
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>Please help how to solve this problem</div>
<div><br>
</div>
<div>Thanks</div>
</div>
<br>
</div>
</div>
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<div><br>
</div>
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<div><br>
<div><br>
</div>
</div>
</div>
</div>
</blockquote>
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