This is what IMPO.TXT looks like when opened with Textpad, which did some conversion to system default characters...
1 459942.8601 2374653.465 1 B?n Nghiêu
2 465347.3047 2375267.236 2 Ph??ng N? Lào
3 465668.0444 2374305.462 3 B?n Chi?ng Sáo
4 465300.1694 2374339.447 4 Làng Bình Lãng
5 464730.8869 2377249.722 5 Chiêng S?o
The description field looks like maybe Chinese to me. But maybe that's okay.
Reading it from lisp line-by-line into a list looks like this...
("ÿþ1\000\t\0004\0005\0009\0009\0004\0002\000.\0008\0006\0000\0001\000\t\0002\00
03\0007\0004\0006\0005\0003\000.\0004\0006\0005\000\t\0001\000\t\000\t\000B\000£
\036n\000 \000N\000g\000h\000i\000ê\000u\000" "\000"
"\0002\000\t\0004\0006\0005\0003\0004\0007\000.\0003\0000\0004\0007\000\t\0002\0
003\0007\0005\0002\0006\0007\000.\0002\0003\0006\000\t\0002\000\t\000\t\000P\000
h\000°\001Ý\036n\000g\000 \000N\000¡\036 \000L\000à\000o\000" "\000"
"\0003\000\t\0004\0006\0005\0006\0006\0008\000.\0000\0004\0004\0004\000\t\0002\0
003\0007\0004\0003\0000\0005\000.\0004\0006\0002\000\t\0003\000\t\000\t\000B\000
£\036n\000 \000C\000h\000i\000Á\036n\000g\000 \000S\000á\000o\000" "\000"
"\0004\000\t\0004\0006\0005\0003\0000\0000\000.\0001\0006\0009\0004\000\t\0002\0
003\0007\0004\0003\0003\0009\000.\0004\0004\0007\000\t\0004\000\t\000\t\000L\000
à\000n\000g\000 \000B\000ì\000n\000h\000 \000L\000ã\000n\000g\000" "\000"
"\0005\000\t\0004\0006\0004\0007\0003\0000\000.\0008\0008\0006\0009\000\t\0002\0
003\0007\0007\0002\0004\0009\000.\0007\0002\0002\000\t\0005\000\t\000\t\000C\000
h\000i\000ê\000n\000g\000 \000S\000¡\036o\000")