00:06In ArcGIS 10.1, we've added an option to automatically georeference your images.

00:12You can access this option from the georeferencing toolbar.

00:16I'm just going to open it from the Customize menu > Toolbars > Georeferencing.

00:25Now I'm going to add my image that is referenced to the display.

00:30So here I have a QuickBird scene.

00:32I can take a look at its Properties.

00:34It's QuickBird.

00:35It's Standard2A processing, and it was taken in 2005.

00:39I'm going to add its Multispectral product to the window.

00:43Then I'm going to zoom to an area...

00:46...where I know that my ungeoreferenced image basically lines up.

00:56Next, I'm going to add in my unreferenced image.

01:01And you can see that the georeferencing is unknown.

01:07So there's a few things I can do.

01:09First, I'm going to make sure that it's selected in the Georeferencing toolbar.

01:15Then, I'm going to fit the image to the display.

01:20And this brings it in.

01:25There are other things you can do.

01:26In this case, my image is oriented approximately the same as the other image.

01:31But I can do things like scale, shift and rotate the image into place.

01:36I can also choose to rotate it, a prescribed amount, or to flip it, a certain way.

01:45In this case, I'm just going to click the auto-georeferencing button and let it work.

01:49This process finds matching control points between the two images...

01:53...based on their spectral characteristics.

01:55Therefore, to get the best results, it's recommended that the two images...

02:00...have similar spectral characteristics in that they be as similar as possible.

02:04For example, two natural color images like we have here of similar pixel sizes.

02:10You won't get good results if you use a low-resolution image as the base... auto-register a high-resolution image.

02:17You also won't get good results if you try and auto-register a black-and-white image... a color image.

02:22It's also best to center the display in the approximate location...

02:26...of the ungeoreferenced image as I have done here.

02:30So once the process is complete, you can examine the control points visually, or... looking at them in the display or you can open the links table.

02:40So here you can see information like the RMS Error.

02:50You can also go in and look at the link.

02:55You can remove it or add in new ones if you want to as well.

03:03So the next thing I'll do is I can simply choose to update the georeferencing...

03:09...which will update the transformation stored on disc...

03:12...or I can choose to rectify it, which will write out a new georeferenced image.

03:16In my case, I just want to update...

03:18...the information that is stored on disk and not create any extra image files.

03:24And now I can continue to work with my image and it into...

03:27...other ArcMap sessions as a georeferenced image.

03:31Next, I'm going to move onto another example.

03:34Here I have another image that's basically in the right location, but it's not quite right.

03:41This is quite typical of some satellite imagery...

03:44...that isn't processed as accurately as other imagery.

03:50So here you can see that my roads... my vector file don't quite line up with my roads in my image.

03:58And if I want to make sure that it's my image that's off, and not my vectors that are off.

04:04What I'm going to do is I'm going to bring in a basemap...

04:07...that I can get to from ArcMap that comes from ArcGIS online.

04:10I'm going to open the Imagery Basemap because I'm going to ultimately use it... fix the georeferencing of this image that's being displayed.

04:21So, because it's a basemap, it automatically gets pushed to the bottom...

04:24...of the table of contents and underneath everything.

04:26So I've turned off my Multispectral scene.

04:30And you can see that my roads line up perfectly with this Basemap image.

04:39So next, I'm just going to zoom back out and turn on my Multispectral scene...

04:44...and I'm going to use my Basemap to correct the image that I displayed.

04:48You can see that nothing is selected in the Georeferencing toolbar.

04:52And this is because the projection isn't appropriate for georeferencing.

04:58So I'm just going to change the Properties of my Data Frame.

05:03I'm going to choose one of the Layers that are already in the map and click OK.

05:08And, yes, I want to reproject everything.

05:13So next, I'm just going to make sure that image I want is selected, which it is.

05:18I don't need to reorient this one; I just need to click auto-georeferencing.

05:24So, just as before, the statistics of the imagery basemap...

05:29...and the statistics of my image are going to be calculated...

05:34...then the two images will be compared to find the matching control points.

05:42So now I can zoom back in...

05:47...and I can see that my vectors do line up much better than they did before.

05:56And just as before I can choose to either update...

06:02...or rectify the image by writing in a new file.

Copyright 2014 Esri
Auto Scroll (on)Enable or disable the automatic scrolling of the transcript text when the video is playing. You can save this option if you login

Automatic Georeferencing in ArcGIS 10.1

This video demonstrates how to georeference imagery in ArcGIS using a tool to automatically collect the control points.

  • Recorded: Jun 8th, 2012
  • Runtime: 06:15
  • Views: 4827
  • Published: Jun 20th, 2012
  • Night Mode (Off)Automatically dim the web site while the video is playing. A few seconds after you start watching the video and stop moving your mouse, your screen will dim. You can auto save this option if you login.
  • HTML5 Video (Off) Play videos using HTML5 Video instead of flash. A modern web browser is required to view videos using HTML5.
Download VideoDownload this video to your computer.
<Embed>Customize the colors and use the HTML code to include this video on your own website
Start From:
Player Color:

Right-click on these links to download and save this video.