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Georeferencing tools

The Georeference tab contains all the tools you need to georeference your raster datasets. The Georeference tab can be accessed from the Imagery tab.

  1. In the Contents pane, highlight the layer you want to georeference.
  2. On the Imagery tab, click Georeference to open the Georeference tab.

Georeference tab on the Imagery tab

The georeferencing options are accessed by clicking Options Georeference Optionsnext to Alignment. A new window appears where you can set default options for all your georeferencing sessions.

The Georeference modal tab has the following five groups:

  • Prepare
  • Adjust
  • Review
  • Save
  • Close

Prepare

The Prepare group has tools to help you set up your source raster and your target datasets.

IconToolDescription

Locate

Search

Finds locations when you type an address, a place-name, or coordinate values.

Set Coordinate System

Set Coordinate System

Sets the coordinate system of the map.

Fit to Display

Fit to Display

Places the raster you are georeferencing into the current display of the map extent.

Move

Move

Shifts the raster you are georeferencing.

Scale

Scale

Resizes the raster you are georeferencing.

Rotate

Rotate

Rotates the raster you are georeferencing

You can manually rotate the raster, or you can press the A key to specify the degrees in the text box.

Flip Horizontal

Flip Vertical

Flip

Flips the raster horizontally or vertically.

Rotate Left

Rotate Right

Fixed Rotate

Turns the raster 90 degrees left or 90 degrees right.

Adjust

The Adjust group has tools for importing or creating control points. It also allows you to choose your transformation or reset your source raster back to the default location.

IconToolDescription

Auto Georeference

Auto Georeference

Automatically creates control points for your source raster against a target raster. The source raster and target raster must be relatively close in terms of geographic location, spectral resolution, and spatial resolution for the autoregistration to work.

Import Control Points

Import Control Points

Imports your control points into the georeferencing session.

Add Control Points

Add Control Points

Adds control point pairs to georeference your raster. First, click the location of the raster you want to georeference. Then choose the corresponding location on the target.

Transformation

Transformation

Sets the transformation to use. The various transformations require a minimum number of control points before you can set the transformation.

Auto Apply

Auto Apply

Updates the display with each control point pair that is created. You can switch this option off if you do not want the display to update after each control point you create.

Apply

Apply

Updates the display with the current control points and transformation. This is useful when Auto Apply is switched off.

Reset

Reset

Resets the raster back to its original location.

Keyboard shortcuts

While you are georeferencing, there are several keyboard shortcuts available to help you perform your task easily and quickly.

ShortcutDescription

C

Pan

Q

Roam

X

Zoom out

Z

Zoom in

L

Switch the visibility of the georeferencing layer on and off

H

Switch the visibility of the control point ScreenTip on and off

A

Open the dialog box to specify the value for Move, Scale, or Rotate.

Esc

Cancel a control point (while creating a control point pair)

Space

Temporarily disable vector snapping while pressed (if snapping has been turned on)

F5

Refresh the Control Point Table

Review

The Review group has tools for quality control of your georeferencing results. You can use the Control Point Table to see the residuals of each control point. You can also select, zoom to, and delete control points.

IconToolDescription

Open Control Point Table

Open Control Point Table

Shows a table that contains control points and residuals.

Select Control Point

Select Control Point

Selects and highlights a control point pair in the map display.

Zoom To Selected Control Point

Zoom to Selected Control Point

Centers and zooms in to a selected control point. To zoom in further, click this tool multiple times.

Delete Selected Control Point

Delete Selected Control Point

Deletes the selected control point.

Delete All

Delete All

Deletes all the control points.

Control Point Table

The Control Point Table and the Review group are used to check the quality of the control points. The Control Point Table provides information regarding the control point pairs that have been created. Each row represents a control point pair and lists the starting coordinates, adjusted coordinates, and the residual error. The sum of the errors is presented in the root mean square (RMS) error.

IconToolDescription

Import Control Points

Import Control Points

Imports your control points into the georeferencing session.

Export Control Points

Export Control Points

Saves the control points into a georeferencing text file.

Add Control Points

Add Control Points

Adds an empty row in the table. This is useful when you want to manually type in the control point coordinates.

By default, this control point is unavailable. Check the Use Control Point box to activate the control point.

Zoom To Selected Control Point

Zoom to Selected

Centers and zooms in to the selected control point. To zoom in further, click this tool multiple times.

Delete Selected Control Point

Delete Selected

Deletes the selected control point.

Delete All

Delete All

Deletes all the control points.

Transformation

Transformation

Sets the transformation to use. The various transformations require a minimum number of control points before you can set the transformation.

Use Control Point

Use Control Point

Switches the control point on and off in the georeferencing calculation and adjustment. Control point rows that are checked off will not be used in the adjustment of the raster and will not have the values affect the RMS error.

Degrees Minutes Seconds

Degrees, Minutes, Seconds

Switches the coordinates between decimal degrees and degrees, minutes, and seconds.

This option is only available when the coordinate system of the map supports degrees, minutes, and seconds.

Save

The Save group has tools to persist the results of the transformation. You can save to the current raster, save to a new raster dataset, or save the control points as a text file.

IconToolDescription

Save

Save

Updates the current raster with the control points and transformation you specified.

Save As New

Save as New

Creates a new raster dataset with the control points and transformation you specified.

Export Control Points

Export Control Points

Saves the control points as a georeferencing text file.

Note:
Saving the ArcGIS Pro project does not save the current state of a georeferencing session. Export your control points before you close the project.

Close

Since this is a modal tab, the georeferencing session remains open and has the same raster layer as the target, even when you switch tabs or the contextual layer in the Contents pane. The Close group has the Close Georeference button Close Georeference, which closes the modal tab when you are finished georeferencing the current raster layer.

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