The Analytics App is a specialized web application on the Capella Platform that is uniquely suited for viewing a time series of Capella images, Change Maps, and contextual imagery. The Analytics App is also used by organizations that subscribe to Capella’s Global Change Monitoring product to view change detection analytics derived from Sentinel-1 SAR data. Global Change Monitoring can be used in conjunction with Change Detection, but the two products are purchased separately and can be used separately.
Accessing Change Detection on the Analytics App
Change Maps can be accessed by following a link from Console or by searching directly within the Analytics App. From Console, a user can follow a link from the ACD Change Map product details page. This link is highlighted by a red rectangle in the screenshot below (Figure 1). This link will launch a new browser tab that displays a list of Areas of Interest (AOI) in an organization’s Analytics App (Figure 2). Each Repeat Task Series that includes Amplitude Change Detection will automatically create an AOI named after the Repeat Task and based on the geometry of the first task of the Repeat Task series. After coming to the AOI list, a user will navigate to their AOI by scrolling the AOI list, searching for the AOI by name, or using the map to find the AOI (Figure 2).
Figure 1: A screenshot of Change Map product details on Console with a red rectangle highlighting the URL to the Analytics App.
Figure 2: A screenshot of the Analytics App AOI list page. In this case, geographic search was used to find the AOI.
Exploring Change Detection on the Analytics App
The Analytics App allows a user to easily review their Repeat Tasks and Change Maps along a timeline. The Change Map can be displayed and hidden with a simple check box, as can Capella imagery. Similarly, further information is available to a user to provide additional context, such as:
- Monthly optical imagery from Sentinel-2 (the monthly image that is used is the least cloudy image possible)
- 3 Mapbox Basemap options that include streets and/or a high resolution electro-optical mosaic
- Capella archive imagery collected at the same or at a similar location as the Repeat Task (this may be zoom limited if the organization has not purchased the image)
Figure 3: A screenshot of the Analytics App AOI details page displaying the Change Map over its source Repeat Task series and an optical image from Sentinel-2 from the current month.