ABEM Terrameter SAS 1000 / SAS 4000
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Electrode Locations
The data are given in a format that supports more than one co-ordinate set and missing
electrodes. Each co-ordinate set is contained in its own section. If an electrode is missing, its
co-ordinates are set to
nan
(=not a number) or a dash (
-
). The number of topography rows
entered in the file header is the total number of rows including co-ordinate set header and
number.
An example:
Cable
#1
21
1
-80
0
0
2
-75
0
0
3
-70
0
0
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19
nan
nan
nan
20
15
0
0
21
20
0
0
Cable
#2
21
1
25
0
0
2
30
0
0
3
35
0
0
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16.6
REMARKS
The default co-ordinate type when converting SAS 1000 / 4000 data files is
Index
. However,
in some cases, data cannot be represented as being acquired along a line or profile. Then the
XYZ
co-ordinate type is used instead. For example, tomographic measurements, areal
coverage, resistance measurements, untitled electrode layouts etc.
It is also possible to force the use of the
XYZ
co-ordinate type when converting data by the
program S4KCONV.EXE.
