30-May-03 (Created: 30-May-03) | More in 'RASI-Rich Annotation Service For Images'

RASI Demonstration Kit

Demonstration Script

Step 1: Login
  1. Choose project 'Storm of the Century' and then enter user name and password
Step 2: Select image
  1. Choose first image, then click on 'Create Annotation'

Project has already been created and 10 infrared images of the storm of the century have been inserted into the project. Actual images are not downloaded, their URLs are specified in the project. The 10 images were taken a hour apart by the NASA GOES satellite

Step 3: Select layer
  1. Choose the first layer
  2. Or click on 'Create new layer'

Definitions: Feature is an area of interest in the image

Annotations are graphical drawings to identify features in the image

Annotation layer is a transparent layer placed on the image where annotations are created

Rich annotation contains both geometry of the feature and data (properties of features)

Step 4: Annotation
  1. Features annotated are: Low pressure point, cold front, warm front and occluded front
  2. Explain tools in toolbar: . Each tool here is used to annotate a feature. The tool is also assigned properties
  3. Choose an annotation tool from the toolbar by clicking on it. Create annotation by drawing on the image
  4. Select the annotation by clicking on it. A blue rectangular handle will appear
  5. Click on Annotation properties contained in the panel on the right
  6. Change marker name, and assign values to properties listed below the marker name (if any). Enter notes for the annotation.
  7. Click on Add Properties. Move property from left to right. Click on Assign Value.
  8. Click on Save layer in right panel to save any changes

The geometry of features and the structured data associated with it gets stored in a database.

Step 5: Summary
  1. Read through the Layer Description. Click on hyperlinks to show highlighted annotations
  2. Click on Edit Summary and scroll to bottom and create bunch of blank lines and show how user can type in text and insert hyperlinks to annotation.
  3. Save and Preview, Close

So these are the steps a teacher would go through to create content from images. Repeat: Identify features with graphical annotations, add data to the annotations and add a narrative to the layer.

Step 6: Calibration
  1. Talk about the four guides. Idea is to place them at known geographical locations and enter the distance or choose a reference
  2. Kilometers per pixel is then computed along the x and y dimension
  3. With this information, we can then compute distances and areas of annotations
Step 7: Overlay layer
  1. Click on File menu in the right panel. Choose Open Layers. In the pop-up window, choose one or more layers
  2. Note, we have created one layer for each of the 10 images. Now we are overlaying multiple layers on the first image
  3. Change opacity of layers. Then click on each layer button (at the bottom of screen) to toggle between layers
  4. Then click on Compare Layers. Choose Low Pressure and click Compare.
  5. Show how speed of movement is computed in the lower table. Talk about the other table. Close window
Step 8: Layer -> Image
  1. Click on Admin --> Layer Admin.
  2. We can save the layer as an image with or without the background image
  3. We can send the metadata file DLESE or NASA
  4. We can change permissions for the layer
Step 9: Admin The entire annotation workbench can be customized to a different domain like Ophthalmology. We can create a new toolbar, new properties and associate annotation tools with properties
  1. Talk through this: To add a new tool, go to Admin --> New Tool; we can Edit Tool, we can add new Annotation Properties
Step 10. Search
  1. Go back to the Image list and click on Search
  2. Type 'Cold Front' and choose Precipitation property greater than 30
  3. Several layers will be displayed. Click on one and layer with image will be displayed
Closing remarks From a pedagogical perspective, this application supports inquiry based learning. It allows
  1. Creation of learning content that is image centric. Here the images are not some illustrative picture in a text book, but real-world images
  2. Learning happen through interaction, measurement, observation, data collection and analysis of data. Students not only play with layers created by teachers, but can create their own layers and experiment with features in sequence of images
  3. Teachers and students can link to other images (images of current phenomenon) and make tie learning to current events