[R-sig-Geo] writeGDAL produce strage value range

["Häring, Tim (LWF)"]

Hello List !

With writeGDAL I exported a grid as Erdas Imagine Image: 
writeGDAL(mygrid, fname = "grid6426.img", driver = "HFA",
 type = "Float32")

If I open this Image in ArcGIS all I see is a solid black box with a strange value range from 1.7549e-038 to 3.40282e+038. I can identify the values of single grid-cells and see that the values in my grid were right. But all I see is a black rectangle.

Is this a RGDAL/GDAL problem or is it a ArcGIS problem? Maybe there is someone having the same problem - and hopefully with a solution.

Thanks!

Cheers,
TIM

------------------------------------------------------- 
Tim Häring
Bavarian State Institute of Forest Research 
Department of Forest Ecology
Am Hochanger 11
D-85354 Freising

http://www.lwf.bayern.de