I have done this using MicroDEM software to fill the SRTM DEM hole.

It is possible with ENVI. http://www.exelisvis.com/docs/ReplacingBadValues.html

It can be filled with both software solutions you mentioned. Whichever you use and depending of the size of the hole you want to fill you should adopt your filling strategy. If you are more precise on the size to be filled I can suggest some good ways.

Sinks in the DEM can be filled in ARC GIS using Spatial Analyst Tools, selecting Hydrology option you will get "Fill" option. Give input as DEM and output name. You can define Z limit (optional) which is maximum elevation difference between a sink and its pour point to be filled.

Alternatively ARC HYDRO TOOLS/TAU DEM (Terain Analysis Using Digital Elevation Models) are also available which full processing of DEM and compatible with ARC GIS.

Regards

Bhatt

Yes, this I know. Thanks sir. But if I don't want to do any hydrological work and simply want my data to be error free so that I could generate the slope map, contour etc (surface analysis) then how should I proceed or is this layer from spatial analyst tool be useful.

again thanks for the reply sir

regards

Hi Mallast, please suggest what could be done to fill the hole using arcgis or erdas.

regards

Dear Acharjee,

You need not do anything more just use Fill command and give input output. That's all. Spatial analyst has that option ,use and see the result.

By subtracting the input DEM used and output DEM obtained you may see the changes, where sinks have been filled.

regards

Bhatt CM

Thanks sir.

Regards

 Shukla Acharhjee, How microDEM fills these voids? I am using SRTM 30m DEM which contains significant amount of voids. Any idea how I can fill them? 

I was trying to use SRTM 90 m to fill SRTM 30 m voids but SRTM 90 m also has lots voids in same area.