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Setting the Project CRS (Coordinate Reference System)

The Project Initiation wizard forces you to choose a coordinate reference system (CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined.) to use for the Petrel project. As shown in the Project Initiation wizard, you have four different methods of selecting the CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined.. A CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. must be set before importing or exporting data via OpenSpirit as OpenSpirit automatically does any required coordinate transformations and must know the CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. of the Petrel project.

Select from external OpenSpirit data source...

In this option you select an existing external project (e.g. an OpenWorks, GeoFrame, Kingdom, etc...  project) and then OpenSpirit will connect to this project and read its CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. details. This CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. will then be used as the Petrel project CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined..  This option allows you to use any standard predefined or custom CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. that may be defined in the external project.

Notes:

1. Petrel requires a CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. that is a map projection system. Some external data stores may allow a user to set a project CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. as a geographic system- these projects can not be used to define the Petrel project CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined..

2. In addition, when an external project is chosen to define the Petrel project CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. the preferred datum shift A transformation from one geographic system (and its associated datum) to another. There are different algorithms use to accomplish this transformation including: geocentric translation (3 parameters) Molodensky (5 parameters), Bursa/Wolfe (7 parameters) , and grid based approach such a NADCON or NTv2 to WGS84 that is defined in the chosen project will also be set as the preferred datum shift A transformation from one geographic system (and its associated datum) to another. There are different algorithms use to accomplish this transformation including: geocentric translation (3 parameters) Molodensky (5 parameters), Bursa/Wolfe (7 parameters) , and grid based approach such a NADCON or NTv2 to WGS84 in Petrel.  This datum shift A transformation from one geographic system (and its associated datum) to another. There are different algorithms use to accomplish this transformation including: geocentric translation (3 parameters) Molodensky (5 parameters), Bursa/Wolfe (7 parameters) , and grid based approach such a NADCON or NTv2 will then be used by the OpenSpirit Adapter when exchanging data between a Petrel project and an external data store if they have differing geodetic datums.

Select from existing OpenSpirit Session...

In this option you select an existing OpenSpirit session that has a preferred CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. already set on it.  The OpenSpirit Session CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. is, in turn, obtained from a selected external project (e.g. OpenWorks, GeoFrame, Kingdom, etc...) that was chosen in the OpenSpirit session wizard.

Select from OpenSpirit EPSG list...

In this option you select a predefined EPSG CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. from the OpenSpirit catalog that is referenced by your OpenSpirit installation.

To select a CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. and an associated preferred datum shift A transformation from one geographic system (and its associated datum) to another. There are different algorithms use to accomplish this transformation including: geocentric translation (3 parameters) Molodensky (5 parameters), Bursa/Wolfe (7 parameters) , and grid based approach such a NADCON or NTv2 you should follow these steps.

1. Optionally filter the list of available CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. names by entering a text fragment (case insensitive)

2. Optionally filter the list of available CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. names by entering a location by either typing in a latitude/longitude or selecting a point on the index map. Then only those map projection systems that are valid at this point on the globe (based on the area of applicability in the EPSG catalog) will be available for selection.

3. Select a System name from the drop down list. You may optionally inspect all its details (e.g. its EPSG parameters names and values) to help confirm your choice.

4. Then if the chosen CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. has a datum other than WGS84 you will be presented a list of datum shifts. You should choose one. Again, you may inspect its details to help select one. Many users may find it helpful to consult a data manager, GIS specialist, or geodesist within their company who may be more familiar with selecting an appropriate CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. and datum shift A transformation from one geographic system (and its associated datum) to another. There are different algorithms use to accomplish this transformation including: geocentric translation (3 parameters) Molodensky (5 parameters), Bursa/Wolfe (7 parameters) , and grid based approach such a NADCON or NTv2 for your area of interest.

You can uncheck the Require transform to WGS84 option on the OpenSpirit General settings tab if you do not want to select a datum shift to WGS84. However, this may prevent you from exchanging GIS events or performing data imports and exports of spatial data if a datum shift is required.

Select from Petrel list...

This option brings up the normal Petrel coordinate system selection dialog. Choose a CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. from this list.

Confirming CRS Choice

Regardless of which method was used to select a CRS A Coordinate Reference System. In Petrel, a project has a CRS which is a map projection system with a reference geographic system which has an associated datum. In addition, a preferred datum shift to WGS84 is defined. you will see the choice reflected in the Project initiation wizard and have one last chance to inspect its details before advancing to the next step in the wizard by clicking the Next button.