The GeoLocator tool allows you to:

• center the map based on user coordinates and place a mark at that location

• change the user coordinate system displayed on the map

• maintain your current zoom level

• track your cursor

Notes:

• When you work with a 3D GeoPDFfile, elevation displays in the coordinate readout and the mini-coordinate display, and bearing and distance appear in a separate display.

• For instructions on how to access the GeoTool tool, see Accessing the GeoPDF Toolbar.

In this document:

Centering the map

• From the TerraGo GeoPDF Toolbar, click GeoLocator .

• Enter the coordinates you want to center in the text boxes provided or use your mouse to locate a coordinate Locate box, either by typing the coordinates in the text boxes or by clicking on a coordinate.

• Click Go.

• The map will center at the coordinates provided and place a mark on the point.

• If your map contains multiple map frames, the GeoLocator tool will find the coordinates in the first map frame it encounters. Click GO again to find the coordinates in the next map frame.

• To clear the existing coordinates, click Clear.

Changing the displayed coordinate system

You can specify the coordinate system displayed on your map in several different ways: using predefined coordinates, using custom coordinates, or by importing a coordinate systems. The Locate dialog box will display values based on the coordinates you select.

Accessing the projection parameters

• From the TerraGo GeoPDF Toolbar, click GeoLocator .

• In the Locate box, click the right angle bracket button .

• From the shortcut menu, click Set Projection Parameters.

• Specify your coordinates from the Coordinate System Selector window.

Predefined coordinates

Selecting your coordinates:

• To display a predefined coordinate system, use the Smart Search box in the Predefined tab to find your desired coordinate system from the available predefined coordinate systems. You can filter your search to reduce the number of found records by selecting specific coordinate system and projection types.

• From the Coordinate System Type list box, choose either Geographic or Projected.

• From the Projection Types list box, choose Gauss Kruger, Polar, State Plane, UTM, or WGS 84 SCAR.

• Select the coordinate system in the left pane to view the details in the right pane.

Modifying pre-defined coordinates:

• To modify the details of the selected coordinate system, click Edit.

• In the Custom tab, make any modifications to create a custom coordinate system.

Saving your coordinate system:

• To save the selected coordinate system in a .wkt file, click Save to file.

• Type the .wkt file name in the File name box.

• Click Save and then OK.

Custom coordinates

Note: Applying a custom coordinate system to a GeoPDF or geospatially-aware PDF file may produce an inaccurate or invalid GeoRegistration.

To ensure success when creating a custom coordinate system, refer to the information presented by the OGP Surveying and Positioning Committee at the EPSG (European Petroleum Survey Group). To understand the parameters required to identify coordinates such that those coordinates describe a position unambiguously as well as define transformations and conversions that allow coordinates to be changed from one CRS to another CRS, refer to the documentation on the EPSG Geodetic Parameter Dataset page. To review all of the geodetic awareness guidance notes, refer to Guidance Notes.

Defining a custom projected coordinate system:

• From the Coordinate System Selector window, click the Custom tab.

• From the Projection list box, click the projection on which your source image file should be based.

• Complete the projection details as needed.

• From the Parameter Units list box, click the unit of measurement the selected projection should be based on.

• In the Datum Smart Search text box, type the first few characters in the datum name and select the appropriate datum.

• From the WGS 84 Transformations list box, click the transformation shift to apply to your custom coordinate system or specify whether the shift is not a transformation but an ellipsoid shift.

• Modify the transformation details as needed.

• To save the custom coordinate system in a .wkt file, click Save to file. Type the .wkt file name in the File name box.

• Click Save and then OK.

Importing coordinates

• To import a coordinate system via a .prj or .wkt file, click the Import tab.

• Type the path and file name to the .prj or .wkt file, or click Browse to open the Select file dialog box through which you can navigate to the location of the file.

• Click OK.

Recently used coordinate systems

To apply one of the fifteen recently used coordinate systems, click the History tab. From the left pane, select the coordinate system to apply. Click OK.

Maintaining the current zoom level

• From the TerraGo GeoPDF Toolbar, click GeoLocator .

• In the Locate box, click the right angle bracket button .

• From the shortcut menu, click Maintain Zoom Level.

• The current zoom percentage will be maintained regardless of changes to the coordinate displayed.

Tracking your cursor

• From the TerraGo GeoPDF Toolbar, click GeoLocator .

• In the Locate box, click the right angle bracket button .

• From the shortcut menu, click Track Cursor.

• The Locate dialog box and the mini-coordinate and 3D bearing and distance displays will track your cursor when you move your mouse.