Blanks indicate lines which make up the edges of waterbodies. The names for waterbodies are given in the .pat, not the .aat. Random values that do not lend themselves to range typing or enumerating or codesets. Blanks indicate lines which make up the edges of waterbodies. The segment ids for waterbodies are given in the .pat, not the .aat.
Zeros indicate lines which make up the edges of waterbodies.
The basin numbers for waterbodies are given in the .pat, not the .aat. Blanks indicate islands which are not assigned segment names. Random values that do not lend themselves to range typing or enumerating or codesets. Blanks indicate islands which are not assigned seg-ids. Zeros indicate islands.