Help: COVE API User's Guide: Coverage Analyzer

Coverage Analyzer is a tool that provides users with the ability to analyze the historical satellite coverage of a region of interest. Users may send requests for a task history, submit a new task, get a task status, retrieve a CSV with scene metadata, retrieve a PNG map image of the task results, retrieve a GeoTiff file, and retrieve a NetCDF file.

Coverage Analyzer throttle limits:
  • POST: 15 requests per hour
  • GET: 120 requests per hour
 

Retrieve task history

Lists all Coverage Analyzer tasks in COVE for the user. The results include task ids which will allow users to retrieve results for existing tasks.

Request Method: GET

Request URL:
https://ceos-cove.org/en/api/v1_2/coverage_analyzer/

URL Parameters: None

Response Example:
[
{
"task_id": "<TASK ID>",
"missions": [
{
"mission": "Sentinel-2A",
"instrument": "MSI",
"mode": ""
}
],
"start_date": "2019-01-01",
"end_date": "2019-01-08",
"region": "Ghana"
"filter_options": {}
},
]
 

Submit a task

Task Input Parameters for Coverage Analyzer:
Parameter Name Data Type Required Description
start_date DateString Yes
Range: mission launch date to the latest acquisition date.
 
Valid dates may be found by submitting a COVE API request for the archived missions list.
 
Refer to Special Data Types for more information on DateString.
end_date DateString Yes
Range: mission launch date to the latest acquisition date.
 
Valid dates may be found by submitting a COVE API request for the archived missions list.
 
Refer to Special Data Types for more information on DateString.
region_folder String Yes Valid folder names may be found by submitting a COVE API request for the regions list.
region String Yes Valid region names may be found by submitting a COVE API request for the regions list.
missions MissionsFilter [ ] Yes
Valid missions may be found by submitting a COVE API request for the archived missions list.
 
Refer to Special Data Types for more information on MissionsFilter.
discretization DiscretizationFilter Yes Refer to the Special Data Types for more information on DiscretizationFilter.
filters MetadataFilter No Refer to the Special Data Types for more information on MetadataFilter.
 
Request Data Example::
{
"start_date": "2020-01-01",
"end_date": "2020-01-31",
"region_folder": "South America",
"region": "Argentina",
"missions": [{
"mission": "Sentinel-1A",
"instrument": "C-SAR",
"mode": "IWS"
}],
"discretization": {
"type": "",
"size": 1.0,
"unit": "deg",
"include_overlap": false
},
"filters": {
"cloud_cover": null,
"day_night": "",
"orbit_direction": "",
"processing_level": ""
}
}
 
Request Method: POST
 
Request URL:
https://ceos-cove.org/en/api/v1_2/coverage_analyzer/
 
URL Parameters: None
 
Response Examples:
Example successful response from request where the results are not ready to retrieve:
{
"status": 202,
" message": "Coverage Analyzer task as been submitted. Please wait for the results.",
"id": "<TASK ID>"
}
 
Example successful response from a request where the results are ready to retrieve:
{
"status": 200,
"message": "Coverage Analyzer results are ready",
"id": "<TASK ID>"
}
 
Failed Response Examples:
{"status": 400, "message": "<Error Message>"}
{"status": 417, "message": "<Error Message>"}
 

Retrieve task status

Once a task has been submitted, users should periodically check the task status.
 
Status codes:
  • 200: task has completed
  • 202: task is still running
  • 417: task has terminated in an error
If the status code is 200 and success is true, it indicates the task has scene data.
If a status code 200 is received, users may send a request for JSON, CSV, PNG, NetCDF, or GeoTIFF results.
 
Request Method: GET
 
Request URL:
https://ceos-cove.org/en/api/v1_2/coverage_analyzer/<TASK ID>/
 
URL Parameters: None
 
Response Example:
{
"execution_start": "2020-09-18 11:56:42",
"execution_time": "00:01:02",
"start_date": "2019-01-01",
"end_date": "2019-01-08",
"modes": "IWS - C-SAR – Sentinel-1A",
"region": "Africa: Ghana",
"discretization": "0.5 deg",
"filter_options": {},
"complete": true,
"status": 200,
"message": "Task successfully completed.",
"success": true
}
 

Retrieve JSON results

The JSON results will contain a list of coordinates for each discretized block in the region of interest. In each discretized block, it will show a title, and count of scenes in the block.

Request Method: GET
 
Request URL:
https://ceos-cove.org/en/api/v1_2/coverage_analyzer/json/<TASK ID>/
 
URL Parameters: None
 
Response Example:
{
"0.0,5.0,0.0,6.0,1.0,6.0,1.0,5.0,0.0,5.0": {
"title": "Region Discretization Longitude 0.0, Latitude 5.0",
"acquisition_count": 2
},
(JSON RESULTS TRUNCATED)
}
 

Retrieve CSV results

The CSV file (binary) will contain the scene metadata for the task. The CSV file contains the columns: mission, name, acquisition_date, browse_url, order_url, start_time, stop_time, center_latitude, center_longitude, path, row, day_or_night, cloud_cover, sensor, sun_elevation, sun_azimuth, and scene_coords.

Request Method: GET
 
Request URL:
https://ceos-cove.org/en/api/v1_2/coverage_analyzer/csv/<TASK ID>/
 
URL Parameters: None
 
Failed Response Example:
{'status': 404, 'message': 'File not found.'}
 

Retrieve PNG results

The PNG image file shows the discretized region of interest on a map where the color of each block in the discretized region reflects the number of scenes intersecting the block for the start date and end date and for the missions requested in the task.

Request Method: GET
 
Request URL:
https://ceos-cove.org/en/api/v1_2/coverage_analyzer/png/<TASK ID>/
 
URL Parameters:
Parameter Name Data Type Required Description
transparent Boolean No
Values: true or false.
 
If transparent is true, the map background will be omitted and the background will instead be transparent.
 
If transparent is false, image resolution is 200dpi.
transparency Float No
Values should be between 0 and 1.
 
Transparency defines the opacity of the coincidence results. Transparency does not apply to the region outline.
 
Default transparency is 0.65.
resolution Integer No
Values should be in dots per inch (dpi).
 
If transparent is false, resolution must be less than or equal to the default resolution.
 
Default resolution is 200dpi.
show_region_outline Boolean No
Values: true or false.
 
Allows users to show or hide the region outline.
map_coordinates Boolean No
Values: true or false.
 
Allows users to fetch the map coordinates used to generate a PNG image.
 
If value is true, the map coordinates will be returned instead of a PNG image.
map_legend Boolean No
Values: true or false.
 
Allows users to fetch the map legend used to generate a PNG image.
 
If value is true, the map legend will be returned instead of a PNG image.
 
The number range on the left side of the map legend represents the number of scenes in the block.
 
Map Coordinates Response Example:
{
"status": 200,
"map_coordinates": [
[-8.661654877310252, -0.16135473389262667],
[-8.661654877310252, 14.838645266107374],
[6.3383451226897485, 14.838645266107374],
[6.3383451226897485, -0.16135473389262667],
[-8.661654877310252, -0.16135473389262667]
]
}
 
Map Legend Response Example:
{
"status": 200,
"map_legend": {
"0 - 0": "#d73027",
"1 - 1": "#f46d43",
"2 - 2": "#fdae61",
"3 - 3": "#fee08b",
"4 - 4": "#ffffbf",
"5 - 5": "#d9ef8b",
"6 - 6": "#a6d96a",
"7 - 7": "#66bd63",
"8 - 9": "#1a9850"
}
}
 
Failed Response Example:
{'status': 404, 'message': 'File not found.'}
 

Retrieve GeoTIFF results

The file exported will be in GeoTIFF format (file extension .tif).

Request Method: GET
 
Request URL:
https://ceos-cove.org/en/api/v1_2/coverage_analyzer/geotiff/<TASK ID>/
 
URL Parameters: None
 
Failed Response Example:
{'status': 404, 'message': 'File not found.'}
 

Retrieve NetCDF results

The file exported will be in NetCDF format (file extension .nc).

Request Method: GET
 
Request URL:
https://ceos-cove.org/en/api/v1_2/coverage_analyzer/netcdf/<TASK ID>/
 
URL Parameters: None
 
Failed Response Example:
{'status': 404, 'message': 'File not found.'}
 

Example API requests using curl

Request user history:
curl -H "Accept: application/json; indent=4" -u username:password https://ceos-cove.org/en/api/coverage_analyzer/
 
Request for Coverage Analyzer task::
curl -H "Content-Type: application/json" -X POST -u username:password -d '{"start_date": "2019-01-01", "end_date": "2019-01-08", "region_folder": "Africa", "region": "Ghana", "missions": [{"mission": "Sentinel-1A", "instrument": "C-SAR", "mode": "IWS"}], "discretization": {"type": "", "size": 1.0, "unit": "deg"}, "filters": {"cloud_cover": null, "day_night": "", "orbit_direction": "", "processing_level": ""}}' https://ceos-cove.org/en/api/coverage_analyzer/
 
Request task status:
curl -H "Accept: application/json; indent=4" -u username:password https://ceos-cove.org/en/api/coverage_analyzer/<TASK ID>/
 
Request JSON File:
curl -u username:password https://ceos-cove.org/en/api/coverage_analyzer/json/<TASK ID>/ -o filename.csv
 
Request CSV File:
curl -u username:password https://ceos-cove.org/en/api/coverage_analyzer/csv/<TASK ID>/ -o filename.csv
 
Request PNG map image:
curl -u username:password https://ceos-cove.org/en/api/coverage_analyzer/png/<TASK ID>/ -o filename.png
 
Request PNG map image (transparent):
curl -u username:password https://ceos-cove.org/en/api/coverage_analyzer/png/<TASK ID>/?transparent=true -o filename.png
 
Request PNG map image (transparency):
curl -u username:password https://ceos-cove.org/en/api/coverage_analyzer/png/<TASK ID>/?transparency=0.65 -o filename.png
 
Request PNG map image (resolution):
curl -u username:password https://ceos-cove.org/en/api/coverage_analyzer/png/<TASK ID>/?resolution=200 -o filename.png
 
Request PNG map image (show_region_outline):
curl -u username:password https://ceos-cove.org/en/api/coverage_analyzer/png/<TASK ID>/?show_region_outline=false -o filename.png
 
Request PNG map image (map_coordinates):
curl -u username:password https://ceos-cove.org/en/api/coverage_analyzer/png/<TASK ID>/?map_coordinates=true -o filename.png
 
Request PNG map image (map_coordinates):
curl -u username:password https://ceos-cove.org/en/api/coverage_analyzer/png/<TASK ID>/?map_legend=true -o filename.png
 
Request PNG map image (map_coordinates with map_legend):
curl -u username:password https://ceos-cove.org/en/api/coverage_analyzer/png/<TASK ID>/?map_coordinates=true&map_legend -o filename.png
 
Request GeoTIFF File:
curl -u username:password https://ceos-cove.org/en/api/coverage_analyzer/geotiff/<TASK ID>/ -o filename.tif
 
Request NetCDF File:
curl -u username:password https://ceos-cove.org/en/api/coverage_analyzer/netcdf/<TASK ID>/ -o filename.nc
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