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07 june 2004
lhsu
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Reprojecting a fault file to correctly overlay on a background map.

I had a fault file, but it was in a different projection from my
background map, so that it was several hundreds of kilometers off.

My background map had been reprojected itself, from an obscure Taiwan
reference to more standard UTM coordinates.

The fault file was still in the obscure Taiwan reference and therefore
did not work correctly.

Douglas created a projection file (specific for my projection):

*************
input
projection transverse
units meters
datum aua
parameters
0.9999
121 0 0
0 0 0
250000
0
output
projection utm
units meters
datum wgs84
zone 51
parameters
end
*************

Singer told me the following commands:
The commands are:

1. arc

   //start arc in the directory with all of the arc setup stuff in it.
   //(~lhsu/arc)

2. change file names to lowercase

   //arc likes all of the files that it's working with to be in lowercase.
   //otherwise, it will fail and not tell you why it failed.

3. shapearc za1b1l za1b1l

   //i don't know what this line does

4. project cover za1b1l newza1b1lutm
   (then fill in each line with the projection file that douglas gave me)

   //do the reprojection
   //newza1b1lutm is just a temporary filename

5. export cover newza1bl1utm blahutm

   //export the new file, blahutm is the permanent new file


The extensions will be appended automatically.
After this, I just used ArcView to overlay the fault file and the
background map and it was right on target.  Yay.