RASI Demonstration Kit
Demonstration Script
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Step 1: Login |
- Choose project 'Storm of the Century' and then enter user name and
password
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Step 2: Select image |
- 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 |
- Choose the first layer
- 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 |
- Features annotated are: Low pressure point, cold front, warm
front and occluded front
- Explain tools in toolbar: . Each tool here is used to
annotate a feature. The tool is also assigned properties
- Choose an annotation tool from the toolbar by clicking on it.
Create annotation by drawing on the image
- Select the annotation by clicking on it. A blue rectangular
handle will appear
- Click on Annotation properties contained in the panel
on the right
- Change marker name, and assign values to properties listed below the
marker name (if any). Enter notes for the annotation.
- Click on Add Properties. Move property from left
to right. Click on Assign Value.
- 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 |
- Read through the Layer Description. Click on hyperlinks to
show highlighted annotations
- 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.
- 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 |
- Talk about the four guides. Idea is to place them at known
geographical locations and enter the distance or choose a reference
- Kilometers per pixel is then computed along the x and y dimension
- With this information, we can then compute distances and areas of
annotations
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Step 7: Overlay layer |
- Click on File menu in the right panel. Choose Open Layers.
In the pop-up window, choose one or more layers
- Note, we have created one layer for each of the 10 images. Now
we are overlaying multiple layers on the first image
- Change opacity of layers. Then click on each layer button (at
the bottom of screen) to toggle between layers
- Then click on Compare Layers. Choose Low
Pressure and click Compare.
- Show how speed of movement is computed in the lower table.
Talk about the other table. Close window
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Step 8: Layer -> Image |
- Click on Admin --> Layer Admin.
- We can save the layer as an image with or without the background
image
- We can send the metadata file DLESE or NASA
- We can change permissions for the layer
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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
- Talk through this: To add a new tool, go to Admin --> New
Tool; we can Edit Tool, we can add new Annotation Properties
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Step 10. Search |
- Go back to the Image list and click on Search
- Type 'Cold Front' and choose Precipitation property greater
than 30
- Several layers will be displayed. Click on one and layer with
image will be displayed
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Closing remarks |
From a pedagogical perspective, this application supports
inquiry based learning. It allows
- Creation of learning content that is image centric. Here the
images are not some illustrative picture in a text book, but real-world
images
- 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
- Teachers and students can link to other images (images of current
phenomenon) and make tie learning to current events
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