Export Formats (Horizon)
Horizons can be exported in the default Insight text, Insight multi-survey or the customised text format.
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