[R-sig-Geo] problem with writeGDAL, its reading as black box in ARcGIS

[Agustin Lobo]

I would use the trial version of global mapper for testing the geotif 
files (http://www.globalmapper.com).
Geotiff examiner is also useful
ftp://ftp.mentorsoftwareinc.com/public/freebies/geotiff/geotiffe.exe


Agus

Edzer J. Pebesma escribió:
> Debs,
> 
> what does gdalinfo sayl about the .tif map? I wouldn't trust Arcmap as 
> the ultimate referee to judge whether a geotiff is sound or not. It may 
> dislike your floating point values, for example.
> --
> Edzer
> 
> Debarchana Ghosh wrote:
>> Hello,
>>
>> I'm using Windows with 2 GB ram.
>>
>> I have created a SpatialGridDataFrame object by using the functions
>> GridTopology and spkernel2d. I used writeGDAL to create a grid object
>> readable in ArcGIS 9.2. But the output of the writeGDAL is a black box. I
>> did try to switch from "stretched" to "categories" and I'm still getting a
>> black box.
>>
>> Here is the code:
>> bird06.xy<-coordinates(splanc_bird06[1:2])
>> grd1<-GridTopology(c(419983.3, 4924198), c(30,30), c(3375,3499))
>> k5000<-spkernel2d(bird06.xy, splanc_bird06$poly, h0=5000, grd1)
>> df<-data.frame(k5000=k5000)
>> kernel5000<-SpatialGridDataFrame(grd1, data=df)
>> writeGDAL(kernel5000, fname="k2006.tif", drivername="GTiff")
>>
>> Also,
>>
>> The value of k2006.tif in Arcmap shows from High: 1.#QNAN to Low: 1.#QNAN
>>
>> But I know k5000 is not empty
>>
>> summary(k5000)
>>
>>         Min.      1st Qu.       Median         Mean      3rd Qu.
>> Max.         NA's
>> 0.000000e+00 0.000000e+00 1.240000e-08 6.191000e-08 5.724000e-08
>> 6.325000e-07 3.248585e+06
>>
>> Thanks,
>> Debs.
>>
>>
> 
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-- 
Dr. Agustin Lobo
Institut de Ciencies de la Terra "Jaume Almera" (CSIC)
LLuis Sole Sabaris s/n
08028 Barcelona
Spain
Tel. 34 934095410
Fax. 34 934110012
email: Agustin.Lobo at ija.csic.es
http://www.ija.csic.es/gt/obster