In addition to the generic FME feature attributes that FME Workbench adds to all features (see About Feature Attributes), all SEG‑P1 features contain an fme_type attribute, which is set to either fme_point or fme_line, since these are the only two valid geometries for SEG-P1 features. This represents that the feature was generated from a CSV file.
|
Attribute Name |
Contents |
|
fme_type |
The FME generic geometric type of this entity. Range: fme_point, fme_line, fme_none Default: fme_none |
The SEG-P1 feature attributes consist of the columns that are shown in the SEG‑P1 table.
|
Item |
Description |
Field |
Record Number |
Columns |
|
1 |
Data record identifier |
Blank |
1 |
1 |
|
2 |
Line Name (left justified) |
4A4 |
1 |
2-17 |
|
3 |
Shotpoint number or event parameter as specified in sections 4c and 4g (right justified) |
I8 (or as expected) |
1 |
18-25 |
|
4 |
Reshoot code for repeated numbers on the same lines A for first reshoot, B for second, etc. |
1A1 |
1 |
26 |
|
5 |
Latitude (deg, min, sec to two decimal places, N or S; or grads to five decimal places, Nor S) |
I2, I2, F4.2, A1, Or |
1 |
27-35 |
|
(F8.5, A1) |
(1) |
(27-35) |
||
|
6 |
Longitude (deg, min, sec to two decimal places, E or W; or grads to five decimal places, E or W) |
I3, I2, F4.2, A1, Or |
1 |
36-45 |
|
(F9.5, A1) |
(1) |
(36-45) |
||
|
7 |
Map grid Easting |
F8.X |
1 |
46-53 |
|
8 |
Map grid Northing |
F8.X |
1 |
54-61 |
|
9 |
Water depth or elevation above sea level |
F5.X |
1 |
62-66 |
|
10 |
Year |
I2 |
1 |
67-68 |
|
11 |
Day of year |
I3 |
1 |
69-71 |
|
12 |
Hours (GMT) |
I2 |
1 |
72-73 |
|
13 |
Minutes (GMT) |
I2 |
1 |
74-75 |
|
14 |
Seconds (GMT) |
I2 |
1 |
76-77 |
|
15 |
Spare |
|
1 |
78-80 |
Example of SEG P1 (1983) header and data records.
HPEARL RIVER MOUTH BASIN, SOUIH CHINA SEA
GROUP PARTICIPANTS CONTRACTOR: OSI, NAV.
CONTRACTOR: ONI, NAV. PROCESSOR: GSI
SURVEY DATES: SEPT. 1979 TO MARCH 1980
NAVIGATON SYSSYSTEMS: PRIMARY: ARGO, SECONDARY: MAXIRAN
POSITION MAPPED: AIRGUN, 56M OFFSET
SPHEROID: WGS-72
PROJECTION: LAMBERT
LAT. ORIGIN: 021000000N
LONG. ORIGIN: 114000000E
FALSE EASTING: 500000
FALSE NORTHING: 500000
SCALE FACTOR: 0.998639
NORTHERN PARALLEL: 024000000N
SOUTHERN PARALLEL: O18000000N
UNITS: METERS
BASE 1: 23125600N116471867E LANE WIDTH:92.490432
BASE 2: 22444394N115490381E LANE WIDTH:92.490432
BASE 3: 22400969N114444301E LANE WIDTH:92.490432
BASE 4: 21370973N112000801E LANE WIDIH:92.490432
CLT4960 12340B17543354N110445881E 155590 161670 85779197065028
CLT4960 12350B17544044N110445458E 155470 161885 8637919?065151
CLT4960 12360B17544727N110445012E 155343 162097 91679197065316
CLT4960 12370B17545421N110444563E 155215 162313 98779197065440
CLT4960 12380B17550118N110444121E 155090 162530 101279197065605
CLT4960 12390B17550814N110443685E 154966 162747 11177919?065729
CLT4960 12400B17551513N110443252E 154843 162964 10067919?065853
CLT4960 12410 17552219N110442824E 154721 163184 100479197070015
CLT4960 12420 17552930N110442412E 154604 163405 98379197070136
CLT4960 12430 17553633N110441988E 154484 163624 99779197070258
CLT4960 12440 17554332N110441557E 154361 163841 10147919?0?0420
CLT4960 12450 17555022N110441109E 154234 164056 11027919?0?0540
CLT4960 12460 17555706N110440652E 154104 164269 109879197070701
CLT4960 12470 17560386N110440186E 153971 164481 1070791970?0824
CLT4960 12480 17561064N110435719E 153838 164692 1111791970?0948
CLT4960 12490 17561750N110435272E 153711 164905 124779197071113
CLT4960 12500 17562454N110434840E 153588 165124 131079197071238
CLT4960 12510 17563157N110434409E 153465 165343 130779197071402
CLT4960 12520 17563853N110433972E 153341 165560 119679197071530
CLT4960 12530 17564548N110433538E 153218 165776 99479197071754