<div>Hi Maven,</div>
<div> </div>
<div>do you think that if you have min = -1267650600228229401496703205376.000000</div>
<div>is the same value you used on  r.null setnull=-1.26765060022823e+030 ?</div>
<div> </div>
<div>I think following the Hamish&#39;s suggestion you will get there :-)</div>
<div><br>bests</div>
<div> </div>
<div>milton</div>
<div><br><br> </div>
<div class="gmail_quote">2010/1/20 maven apache <span dir="ltr">&lt;<a href="mailto:apachemaven0@gmail.com">apachemaven0@gmail.com</a>&gt;</span><br>
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<div class="gmail_quote">2010/1/21 Hamish <span dir="ltr">&lt;<a href="mailto:hamish_b@yahoo.com" target="_blank">hamish_b@yahoo.com</a>&gt;</span> 
<div class="im"><br>
<blockquote style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0pt 0pt 0pt 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
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<div></div>
<div>maven apache wrote:<br>&gt; I have a geotiff now, and some cells have a not-expected<br>&gt; value, so I want to Interpolation them, and I notice that<br>&gt; there is a command named r.fillnull, however the cell to be<br>
&gt; changed is not null, so I want to :<br>&gt; 1) change the special  cell value to null<br>&gt;<br>&gt; 2) use the r.fillnull to Interpolation.<br>&gt;<br>&gt; The problem is I do not know how to do the step 1 with<br>
&gt; grass, anyone can do me a favor?<br><br><br></div></div>try r.null.<br><font color="#888888"><br><br>Hamish<br><br><br><br></font></blockquote></div>
<div>Hi;<br>It seems that the r.null does not work.<br><br>1) I use the <a href="http://r.info/" target="_blank">r.info</a> to get the info of the tiff which I have imported to grass and I got that:<br>Hi:<br><br>(Thu Jan 21 09:56:46 2010)                                                      <br>
<a href="http://r.info/" target="_blank">r.info</a> map=aaa@PERMANENT                                                        <br> +----------------------------------------------------------------------------+<br> | Layer:    aaa@PERMANENT                  Date: Tue Jan 12 16:02:39 2010    |<br>
 | Mapset:   PERMANENT                      Login of Creator: Administrator   |<br> | Location: hdf5loc                                                          |<br> | DataBase: D:\GrassDataBase                                                 |<br>
 | Title:     ( aaa )                                                         |<br> | Timestamp: none                                                            |<br> |----------------------------------------------------------------------------|<br>
 |                                                                            |<br> |   Type of Map:  raster               Number of Categories: 499             |<br> |   Data Type:    FCELL                                                      |<br>
 |   Rows:         720                                                        |<br> |   Columns:      1440                                                       |<br> |   Total Cells:  1036800                                                    |<br>
 |        Projection: Latitude-Longitude                                      |<br> |            N:        90N    S:        90S   Res:  0:15                     |<br> |            E:       180E    W:       180W   Res:  0:15                     |<br>
 |   Range of data:    min = -1267650600228229401496703205376.000000  max = 4 |<br> |                                                                            |<br> |   Data Description:                                                        |<br>
 |    generated by r.in.gdal                                                  |<br> |                                                                            |<br> |   Comments:                                                                |<br>
 |    r.in.gdal input=&quot;D:\data\hdf5\aaa.tif&quot; output=&quot;aaa&quot;                     |<br> |                                                                            |<br> +----------------------------------------------------------------------------+<br>
(Thu Jan 21 09:56:47 2010) Command finished (0 sec)                             <br>(Thu Jan 21 09:56:50 2010)    <br><br><br>2)then I use r.null to set the null value to null:   r.null setnull=-1.26765060022823e+030<br><br>
<br>3) I use the <a href="http://r.info/" target="_blank">r.info</a> again to see if it is changed :<br><a href="http://r.info/" target="_blank">r.info</a> -r map=aaa@PERMANENT                                                     <br>
min=-1.26765060022823e+030<br>max=498.5<br>(Thu Jan 21 09:56:50 2010) Command finished (0 sec)                             <br> </div></div>It seems that the valuse are  not changed to null.<br><br>I wonder why?<br><br>_______________________________________________<br>
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