...The availability of UTM-referenced DRGs for my project area is spotty at best... this I just confirmed at http://statgraph.cr.....gov/viewer.htm. So yes, I'm quite interested in converting needed Tennessee maps to UTM Zone 17, for use in Microdem. The ones I need initally are as follows: clingmans_dome, gatlinburg, kinzel_springs, mount_le_conte, silers_bald, thunderhead_mtn & wear_cove. Again the source of the Tennessee maps: http://www.tngis.org/drg_quad_sp/
To batch-convert georeferenced TIFFs (also GEOTIFFs) from Tennessee State Plane (feet) to UTM Zone 17 North, follow the instructions below.
call "C:\Program Files\FWTools2.4.7\setfw"
for %%f in (*.tif) do gdalwarp -s_srs EPSG:2274 -t_srs EPSG:32617 %%f warped\%%f
Copy the four lines of code in the code box above, paste it into a plain-text editor (Notepad will do) and save it as a file called 'convert.bat').
Copy all of the TIFFs to be converted to one directory. Make sure that the *.tfw world files are copied with the TIFFs.
Install FWtools from http://fwtools.maptools.org/
. The current version for Windows will install by default in C:\Program Files\FWTools2.4.7. If FWTools is installed in a different directory the second line of 'convert.bat' will need to be edited appropriately.
Place 'convert.bat' in the directory containing the TIFFs to be processed.
Run 'convert.bat' by double-clicking the 'convert.bat' icon.
The converted TIFFs will appear in a sub-directory called 'warped'. They will have the same names as the original TIFFs (so be careful not to get the two sets of TIFFs mixed up). The converted TIFFs will not have *.tfw files, they will have the spatial data built into them (in other words, they will be GeoTIFFs).
Finally, offer up a silent thanks to Hans, who wrote the original batch (*.bat) file.
The converted TIFFs will load correctly into MICRODEM or 3DEM (or any other GIS software).
Regards, N (another 60-something person).
Caversham, Reading, England.