Horizons - contains seismic picking

Right mouse button on the icon allows to:

• Add new horizon
• Clear horizons
• Sort by name

• Receive horizons
• Commit horizons

In the Data Manager, expand Horizons and your user branch (Local for local data). Right-click its Time or Depth node and choose Create horizon. The new-horizon dialog sets Domain to match that node; keep that setting and confirm the name to create the horizon directly under the selected node. The same menu also offers:

• Create thickness maps
• Create isopach maps (Depth only)

These commands are enabled when the selected domain contains at least two horizons. Create thickness maps creates one map for each adjacent horizon pair. Time-domain results are stored under Maps > Isochron maps and named Isochron_<lower horizon>-<upper horizon>; depth-domain results are stored under Maps > Isochore maps and named Isochore_<lower horizon>-<upper horizon>. Create isopach maps stores depth-domain results under Maps > Isopach maps.

Right-click a user-created folder or subfolder under a Time or Depth node to:

• Add new horizon — the new horizon is created directly in the selected folder, including a nested subfolder, instead of at the top of the Time or Depth node.
• Remove folder — available whether the folder is empty or populated. After you confirm, g-Space removes only that folder and moves its horizons and nested subfolders, with their contents intact, to its immediate parent.
• Remove folder with horizons — available when the folder contains at least one horizon, including in nested subfolders. The confirmation names the folder and the total number of horizons. Accepting it deletes those horizons recursively and removes the folders that become empty.

If a horizon is used by a grid, g-Space reports and keeps that horizon. Any folder that still contains a surviving horizon also remains. The resulting folder structure is retained when the Data Manager refreshes and when the project is reopened.

For a multiple selection of horizons or horizon folders, Remove first asks you to confirm the number of horizons. Selected folders are removed only when no horizon remains inside them.

These removal commands apply only to user-created folders. The structural Horizons, user (Local for local data), Time, and Depth nodes cannot be removed.

Right mouse button on a horizon additionally allows to:

• Calculate Dip — compute the dip (maximum slope) of the horizon surface.
• Calculate Azimuth — compute the dip azimuth (slope direction) of the horizon surface.

For a horizon the result is stored as a horizon-attribute map named <horizon>_dip or <horizon>_azimuth. The same Calculate Dip and Calculate Azimuth options are available on the right mouse button of a map, where the result is created as a separate map.

Convert horizons between time and depth

A selected velocity model is required to convert horizons between the time and depth domains.

• To convert one horizon, right-click it under Horizons in the Data manager and choose Convert to depth for a time horizon or Convert to time for a depth horizon.
• To convert all horizons in a folder, right-click that folder or subfolder under the Time or Depth node and choose the same command.
• To convert several horizons at once, select them in the same domain, right-click the selection and choose the same command.

Conversion adds a copy of each included horizon to the other domain, keeping the source horizon's name; if that name is already taken, a numeric suffix is added. The original horizons remain unchanged. The command is disabled when no velocity model is selected.