TABLE OF CONTENTS

Obtaining the Tutorial Data

Before beginning the tutorial, you will copy all of the required tutorial data onto your Desktop. There are two ways of obtaining the tutorial data. Option 1 is best if you are completing this tutorial in one of our short courses or from the GIS/Data Center Fondren Library and Option 2 is best if you are completing the tutorial from your own computer.

OPTION 1: Accessing tutorial data from Fondren Library using the gistrain profile

If you are completing this tutorial from a public computer in Fondren Library and are logged on using the gistrain profile, follow the instructions below:

1. On the the Desktop, click the File Explorer icon Image Added located on the Windows Taskbar at the bottom left corner of the screen.
2. In the 'File Explorer' window, click This PC on left side panel and then navigate to gisdata (\\file-rnas.ricedouble-click the Computer icon > gisdata (\\file-rnas.rice.edu) (R:) >  > Short_Courses > Mapping_Imagery. > HIST207 > HIST207_GDC3 
3. To create a personal copy of the tutorial data, drag the Imagery folder  folder onto the the Desktop. 
4. Close all windows.

OPTION 2: Accessing tutorial data online using a personal computer

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1. Click Imagery.zip above to download the tutorial data.
2. Open the Downloads folder.
3. Right-click Imagery.zip and select Extract All....
4. In the 'Extract Compressed (Zipped) Folders' window, accept the default location into the Downloads folder and click Extract.
5. Drag the unzipped Imagery folder onto your Desktop.
6. Close all windows.

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1. On the Desktop, double-click the Imagery folder.
2. Double-click the Imagery.aprx project file to  ArcGIS Project File (blue icon) to open the project in ArcGIS Pro.
   
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3. Maximize the ArcGIS Pro application window.

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Ensure that all four feature classes (streets, sidewalks, parking, buildings) appear in the Contents pane on the left. If you are missing any layers, drag them from the Catalog pane on the right directly into the Map view. The layers of the Rice campus should look familiar. If desired, update the symbology of each of the layers to a color of your choice by right-clicking on the color patch beneath each layer name in the Contents pane and selecting a color. For example, you might choose to make the parking and streets layers two different shades of gray, the sidewalks layer tan, and the buildings layer red, as shown below.

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Now you will add a JPEG image depicting an aerial view of campus to your map. This image is just like any other image file you are familiar with and does not contain any sort of spatial reference.

1. In the Catalog pane, expand the Folders folder.
2. Expand the Imagery folder.

3. Right-click the aerial.jpg raster image and select Add to Current Map.

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   If the Add to Current Map command does not work, you can click the Add Data button within the Map tab on the ribbon and then browse to and select the same JPEG image file.

4. In the Table of Contents pane, right-click the aerial.jpg layer and select Zoom to Layer.
5. In the Table of Contents pane, right-click the streets layer and select Zoom to Layer.

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You now need to identify a common point in both the aerial image and the vector reference layers.

1. In the Table of Contents pane, uncheck the parking and sidewalks layers to make the aerial image easier to view.

2. On the western portion of campus, visually identify the football stadium in both the aerial layer and the buildings layer.
   
   
   
   

3. Hold down Shift and your cursor should switch from a pointer finger to a magnifying glass with a plus sign.

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   If you don't see the proper cursor, then you may need to select the Explore button on the Map tab in the ribbon.

4. Click and drag a box around the football stadium in both layers to zoom in to the area in which you will add your first control point.
   
   
   
   

5. On the ribbon, on the Georeference tab, click the Add Control Points button.  Your cursor will change to a crosshair.
   
   
   
   

6. Click on the southwest corner of the upper deck of the stadium in the aerial layer.

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   If your first click is on an unintended location, press Esc to remove the point. Then click the Add Control Points button again to resume adding a point.

   

    

7. With a line linking to the first point you clicked on, click on the southwest corner of the upper deck of the stadium on the buildings layer.

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   It is fine to zoom in and out by scrolling the scroll wheel or to pan by clicking and holding your scroll wheel button while moving the mouse in between clicking on the two control points if they are not both visible on your screen. If your second click is on an unintended location or you clicked on the two points in the opposite order, then, on the Georeference tab, in the Review group, click the Select Control Point button. Image RemovedImage Added Then click on the erroneous control point on your map. The control point symbol will change from a larger red circle with an X through it to a smaller red box when it is selected. Once the control point is selected, go back to the Review group on the Georeference tab and click the Delete Selected Control Point button. If you make a mistake on your first control point, so that removing the erroneous point results in removing all points, then the image will disappear from view and you will need to start again by zooming to the streets layer and the clicking the Fit to Display button. Click the Add Control Points button to resume adding a point.

The two points will snap together, lining up the image at that particular control point.

1. In the Table of Contents pane, right-click the streets layer and select Zoom to Layer to return to the full extent of the image.

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1. In the center of campus, visually identify Fondren Library in both the aerial layer and the buildings layer.
   
   
   
   
2. In the ribbon, click the Map tab and click the Explore button.
3. Hold down Shift and click and drag a box around Fondren Library in both layers to zoom into the area in which you will add your second control point. You may have to toggle off the buildings layer to see Fondren Library on the aerial layer.
   
   
   
   
4. On the ribbon, click the Georeference tab and click the Add Control Points button.
5. Click on the southwest corner of Fondren Library in the aerial layer.
   
   
   
   
6. With a line linking to the first point you clicked on, click on the southwest corner Fondren Library in the buildings layer.

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1. In the northern-most portion of campus, visually identify Martel College in both the aerial layer and the buildings layer.
   
   
   
   
2. In the ribbon, click the Map tab and click the Explore button.
3. Hold down Shift and click and drag a box around Martel College in both layers to zoom into the area in which you will add your third control point.
   
   
   
   
4. In the Georeferencing toolbar, click the Add Control Points button.
5. Click on the northwest corner of Martel College in the aerial layer.
6. With a line linking to the first point you clicked on, click on the northwest corner Martel College on the buildings layer.
   
   
   
   
7. In the Table of Contents pane, right-click the streets layer and select Zoom to Layer to return to the full extent of the image.

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1. When you are satisfied with your control points, in the ribbon, on the Georeference tab,  in the Save group, click the Save button.
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2. On the Georeference tab, click the Close Georeference button.
   
   

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Before beginning this tutorial, there was only one aerial file: aerial.jpg. During the tutorial, you generated the two additional files. The JGWX file contains the spatial referencing information that you just created. Because this new file has been created, the image will now line up spatially whenever you add it into a new data frame. In other words, you only need to georeference a layer once. The XML file contains the metadata used by ArcCatalog to describe the newly georeferenced aerial image. If you were to delete these two accessory files, the image would no longer be georeferenced and would be returned to its original state.

Digital Sanborn Maps

Fondren Library provides access to Digital Sanborn Maps for Texas. This database can be accessed here: Digital Sanborn Maps (Texas). Founded in 1867 by D. A. Sanborn, the Sanborn Map Company was the primary American publisher of fire insurance maps for nearly 100 years. The maps provide a wealth of information, such as building outline, size and shape. Come explore America's rich and diverse building history. For this tutorial, you will practice what you learned above by georeferencing two Sanborn maps of Rice University from 1925 and 1951.

1. Open up your ArcGIS Project File again from the Desktop, by double-clicking the Imagery folder.
2. Double-click the Imagery.aprx ArcGIS Project File (blue icon) to open the project in ArcGIS Pro.
   
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3. Maximize the ArcGIS Pro application window.
4. In the Catalog pane, expand the Folders folder.
5. Expand the Imagery folder.

6. Right-click the sanborn_rice_1925.jpg raster image and select Add to Current Map.

7. Right-click the sanborn_rice_1951.jpg raster image and select Add to Current Map.

8. Choose three control points per image to georeference and save the two maps.
   
   

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   Hint: For the 1925 map, try a control point at Lovett Hall, Herzstein Hall, and the road intersection at Rice Blvd and Shepherd Drive. For the 1951 map, try control points at Lovett Hall, Herzstein Hall, and the new Football Stadium.

9. Once complete, in the Contents pane, toggle off the sanborn_rice_1925 layer. 
10. In the ribbon, click the Share tab
11. In the Export group, click the green export arrow and save as a JPEG.
12. Toggle off the sanborn_rice_1925 layer and toggle on the sanborn_rice_1951 layer.
13. Repeat Step 11 for the sanborn_rice_1951 layer.