Export Formats (Horizon)
Horizons can be exported in the default Insight text, Insight multi-survey, customised text or GEOH5 formats.
Note: For a full list of Horizon file formats accepted by Insight, see Formats accepted by Insight for import and export.
X/Y horizon
For horizons in the X/Y coordinate space, you can export horizon in the default Insight format (.xyt/.xyz/.xya) or customised format (.dat). In Insight format, the text file consists of three columns. Each line is based on the following format:
- .xy = Easting/Northing
- .xyt = Easting/Northing/TWT
- .xyz = Easting/Northing/TVDSS
- .xya = Easting/Northing/Attribute (e.g. Amplitude)
Comment lines begin with a hash (#) character. For example:
# subgrid=UTMX:621000-629760[60]+UTMY:6178450-6188950[25]
# vertical_dimension=TWT
# vertical_unit=ms
621060 6180325 2419.05
621060 6180350 2418.56
621060 6180375 2418.05
621060 6180400 2417.5
621060 6180425 2416.89
Note: The comments defining the grid, vertical dimension and its unit above the columns are not required.
IL/CL horizon
Similar to X/Y horizons, you can export a horizon in the IL/CL coordinate space using the default Insight format or customised format. For export in Insight format, each line is based on the following format:
- .ilcl = Inline/Crossline
- .ilclt = Inline/Crossline/Time
- .ilclz = Inline/Crossline/Depth
Comment lines begin with a hash (#) character. For example:
# subgrid=il:1272-3492[10]+cl:1320-3520[10]
# vertical_dimension=time
1272 1320 3005.008
1272 1330 3005.050
1272 1340 3005.117
1272 1350 3005.179
1272 1360 3005.238
1272 1370 3005.294
1272 1380 3005.378
1272 1390 3011.869
Note: The comments defining the grid and vertical dimension above the columns are not required.
Meanwhile for all the types of horizons, custom export allows you to choose any combination of location (IL, CL, X, Y, CMP, Offset, as appropriate) and amplitude columns, in any order, for export.
Multi-survey horizon
For a horizon that is picked across multiple horizons, you can export it to the Insight multi-survey format (.dugmsh). This is the default format for exporting 2D and multi-survey horizons. See the following for an example of a multi-horizon file in the .dugmsh format:
multi-survey-horizon version 1.0
name MultiSurvey_Horizon
projectCRS
name "Anguilla 1957 / British West Indies Grid"
authority EPSG
code 2000
vertical
dimension time
unit ms
survey
type 3D
name "South Australia 3D"
uuid (3c7752d9-9bd9-427e-81ec-e51bb99ec6f5)
inline
sequence 1001-1700[1]
crossline
sequence 2027-6762[1]
data
1001 2554 2187.328
1001 2555 2186.925
1001 2556 2186.461
1001 2557 2185.969
1001 2558 2185.494
1001 2560 2184.884
1001 2561 2184.463
survey
type 2D
name "South Australia 2D"
uuid (c0734c11-c75a-47c2-99ac-68c5f9eed1b8)
line
name W00FDW0023
uuid (4159d552-5254-4e5d-bac4-970d354a396c)
cmp
sequence 6904-11190[1]
data
6904 1830.801
6905 1830.851
6906 1830.916
6907 1830.833
6908 1831.196
6909 1831.271
6910 1831.555