Set solution CRS and Display Units

For legacy solutions, a check is performed when the solution is opened; if a CRS is not detected you are prompted to assign a CRS before you can continue. In both cases, the Set solution CRS form is used to select the CRS and horizontal unit. For CRS selection, the Blue Marble library is used, which provides a database that includes all major world-wide systems.

In some situations, the data you are working with may not be identified by a CRS, or the CRS information may have been lost or is unknown. To work in a geospatially unaware environment, use Sandbox Mode, which enables you to work with your data without assigning a CRS.

For an overview of the application's rules and limitations related to your choice of geodetic mode, see Before you start - geodetic rules.

New solutions

When you create a new solution, can assign a CRS and select the display units that will be used throughout. In case you do not want to assign a CRS, see Sandbox Mode further below.

1. On the 'Set solution CRS and Display Units' form, click Select CRS to open the CRS selection dialog.
2. In the dialog there are two main ways of finding the CRS of interest:
   1. The left pane, under 'Folders', displays CRSs sorted by geographical location. You can expand each folder to view a set of systems further sorted by geographical location. Note that at the bottom of the list there is a folder called UTM, containing a further set of CRSs not stored under any particular geographical location. Once you select a folder/location, the individual CRSs contained in the set appear in the display pane in the middle of the view. Use the Include Subfolders checkbox at the upper right side of the form to include/exclude CRSs within subfolders. Find and click the CRS you want to assign to the solution.
   2. In the left pane, under 'Search', you can search for a specific CRS. Type any number or letter combination (not capital sensitive) to be included in your results. The search acts on the folder you currently have selected under 'Folders' (e.g. if folder 'Africa' is selected, the search only applies to CRSs stored in the Africa folder; select folder 'Projected' to search all available CRSs) and on the information currently displayed in the columns on the form.
      • Optionally, use the drop-down list behind 'Search Type' to limit the search to an individual column/entry field. You can search by 'Name' (refers to the 'Name' column), 'Remarks' (refers to the 'Remarks' field. To access remarks of a CRS, select a CRS and click Info at the lower-right side of the form. On the dialog that opens, click the 'Identifiers' tab where the 'Remarks' field can be found), 'Codes' (refers to the 'EPSG Code' column) and 'Recent' (refers to all recently applied CRSs).
      • With Advanced Search you can further narrow down the search result by applying filters on the columns 'Datum', 'Units', 'Geodetic' and 'Projection' and on a 'Geographic Area' (click 'Map View' to locate the area on the world map). Each active filter within the 'advanced search' option will be listed at the top of the Select Coordinate Reference System form. To remove a filter, click on the trash icon, or click 'Remove all Filters' button to remove all filters in one go.
3. Click OK to select the CRS and close the CRS selection dialog.
4. On the solution CRS form, the CRS you selected is now displayed in the Name, Authority, Code text field. In addition, the horizontal measurement unit associated with the CRS, which can be found in the Units column of the CRS selection dialog, is assigned to the solution and displayed in the Horizontal unit text field. The assigned horizontal unit cannot be changed and is assigned strictly based on the selected CRS.
5. With the CRS and horizontal unit specified, the last step is to select unit system for display to use throughout the solution. If you select a unit system that uses a horizontal unit that is different from what the CRS uses, the horizontal unit that is used for display throughout the application changes to match that of the CRS. For example, if you select a CRS that uses meters (m) as the horizontal unit, and choose the Field unit system, which uses feet (ft) as the horizontal unit, meters (m) will be used as the horizontal unit, though the rest of the measurement units will be displayed according to the Field unit system.
You can import data files with different coordinate units than the existing units of coordinates in the solution. If the units are not specified in the import data file then the units of the coordinates specified in the solution CRS are used. You must select the coordinates units during the import process if neither the import data file nor the solution CRS has coordinates units assigned to them.
6. Click OK to assign the CRS and unit system to the new solution.

Importing a custom CRS

Apart from using a CRS from the Blue Marble library, you can import a custom CRS, or any other CRS that is not known to JewelSuite Geomechanics. There are two options to import a CRS.

1. Upon opening a new solution, from the Set Solution CRS and Display Units form.
2. When working in a solution that already has a CRS but contains no data yet. In the hOME strip, go to Settings > CRS.

Click the Import CRS  icon. In the dialog that appears, select a file containing the CRS you want to import. JewelSuite Geomechanics recognizes several file formats:

• Blue Marble XML (*.xml)
• Well-Known text (*.wkt)
• Esri PRJ (*.prj)
• Esri GTF (*.gtf)
• MapInfo MAP (*.map)
• MapInfo TAB (*.tab)
• GeoTiff (*.geotiff)
• GML (*.gml)

If the file you select contains more than one CRS, you will be prompted to choose just one. Click the Select CRS button on the Set solution CRS and Display Units form and, in the left pane of the Select Coordinate Reference System form open the Custom section and select the CRS you want to use.

Your selected CRS will be assigned to the solution and added to the library of CRSs in JewelSuite Geomechanics.

Legacy solutions

The Set solution CRS form appears when you open a legacy solution that has no associated CRS. Before continuing work with the solution you will need to assign a CRS.

1. Click Select CRS to open the CRS selection dialog.
2. In the dialog there are two main ways of finding the CRS of interest:
   1. The left pane, under 'Folders', displays CRSs sorted by geographical location. You can expand each folder to view a set of systems further sorted by geographical location. Note that at the bottom of the list there is a folder called UTM, containing a further set of CRSs not stored under any particular geographical location. Once you select a folder/location, the individual CRSs contained in the set appear in the display pane in the middle of the view. Use the Include Subfolders checkbox at the upper right side of the form to include/exclude CRSs within subfolders. Find and click the CRS you want to assign to the solution.
   2. In the left pane, under 'Search', you can search for a specific CRS. Type any number or letter combination (not capital sensitive) to be included in your results. The search acts on the folder you currently have selected under 'Folders' (e.g. if folder 'Africa' is selected, the search only applies to CRSs stored in the Africa folder; select folder 'Projected' to search all available CRSs) and on the information currently displayed in the columns on the form.
      • Optionally, use the drop-down list behind 'Search Type' to apply the search term to a particular column/entry field. You can apply the search term on 'Name' (refers to the 'Name' column), 'Remarks' (refers to the 'Remarks' field. To access remarks of a CRS, select a CRS and click Info at the lower-right side of the form. On the dialog that opens, click the 'Identifiers' tab where the 'Remarks' field can be found), 'Codes' (refers to the 'EPSG Code' column) and 'Recent' (refers to all recently applied CRSs).
      • With Advanced Search you can further narrow down the search result by applying filters on the columns 'Datum', 'Units', 'Geodetic' and 'Projection' and on a 'Geographic Area' (click 'Map View' to locate the area on the world map). Each active filter within the 'advanced search' option will be listed at the top of the Select Coordinate Reference System form. To remove a filter, click on the trash icon, or click 'Remove all Filters' button to remove all filters in one go.
3. Click OK to select the CRS and close the CRS selection dialog.
4. On the solution CRS form, the CRS you selected is now displayed in the Name, Authority, Code text field. In addition, the horizontal measurement unit associated with the CRS, which can be found in the Units column of the CRS selection dialog, is assigned to the solution and displayed in the Horizontal unit text field. The assigned horizontal unit cannot be changed and is assigned strictly based on the selected CRS.
5. Click OK to assign the CRS and continue your work with the solution.

Sandbox Mode

When CRS information does not exist or is unavailable for a particular dataset, you still have the ability to perform the full workflow by using Sandbox Mode. Sandbox Mode is available for both new and legacy solutions. Upon opening, automatically the 'Set solution CRS and Display Units' form opens.

To enable Sandbox Mode

1. On the 'Set solution CRS and Display Units' form, click the Sandbox Mode option.
2. On the Sandbox Mode dialog that pops up, check the checkbox to acknowledge the consequences, and click Use Sandbox Mode to enable the mode and begin to work.

Once in Sandbox Mode, a CRS does not need to be specified, nor will any data import action be blocked if the data belongs to a CRS that's different from data already in your solution. The limitations of working in Sandbox Mode are described below:

• Drag and drop of data from a solution in Sandbox Mode to a solution using a CRS is blocked. However, drag and drop of data from a solution with a CRS to a solution in Sandbox Mode is allowed (only between instances of the application that are in the same version).
• A real-world CRS can no longer be assigned.

Changing the CRS

Once assigned, a CRS can only be changed if there is no geospatial data present. Once geospatial data is created or imported into the solution, the CRS is locked. A CRS change can be performed by clicking the button on the CRS form (home > Settings > CRS).

Drag and drop data

Transfer of data between two instances of JewelSuite Geomechanics is blocked if the two solutions do not share the same CRS.