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A GeoRSS client library for the IGN Sismologia feed.

Project description


Build Status codecov PyPi Version

This library provides convenient access to the Instituto Geográfico Nacional Sismología (Earthquakes) Feed feed.


pip install georss-ign-sismologia-client


See below for examples of how this library can be used for particular GeoRSS feeds. After instantiating a particular class and supply the required parameters, you can call update to retrieve the feed data. The return value will be a tuple of a status code and the actual data in the form of a list of feed entries specific to the selected feed.

Status Codes

  • UPDATE_OK: Update went fine and data was retrieved. The library may still return empty data, for example because no entries fulfilled the filter criteria.
  • UPDATE_OK_NO_DATA: Update went fine but no data was retrieved, for example because the server indicated that there was not update since the last request.
  • UPDATE_ERROR: Something went wrong during the update

Supported Filters

Filter Description
Radius filter_radius Radius in kilometers around the home coordinates in which events from feed are included.
Minimum Magnitude filter_minimum_magnitude Minimum magnitude as float value. Only events with a magnitude equal or above this value are included.


from georss_ign_sismologia_client import IgnSismologiaFeed
# Home Coordinates: Latitude: 40.38, Longitude: -3.72
# Filter radius: 200 km
# Filter minimum magnitude: 3.0
feed = IgnSismologiaFeed((40.38, -3.72), 
status, entries = feed.update()

Feed entry properties

Each feed entry is populated with the following properties - subject to availability in GeoRSS feed:

Name Description
geometry All geometry details of this entry.
coordinates Best coordinates (latitude, longitude) of this entry.
external_id External id of this entry.
title Title of this entry with date and time of the event.
attribution Attribution of the feed.
distance_to_home Distance in km of this entry to the home coordinates.
description Textual description of this entry.
published Published date of this entry.
magnitude Magnitude value of this entry.
region Region in formation of this entry.
image_url Image URL showing a map of the entry.

Feed Manager

The Feed Manager helps managing feed updates over time, by notifying the consumer of the feed about new feed entries, updates and removed entries compared to the last feed update.

  • If the current feed update is the first one, then all feed entries will be reported as new. The feed manager will keep track of all feed entries' external IDs that it has successfully processed.
  • If the current feed update is not the first one, then the feed manager will produce three sets:
    • Feed entries that were not in the previous feed update but are in the current feed update will be reported as new.
    • Feed entries that were in the previous feed update and are still in the current feed update will be reported as to be updated.
    • Feed entries that were in the previous feed update but are not in the current feed update will be reported to be removed.
  • If the current update fails, then all feed entries processed in the previous feed update will be reported to be removed.

After a successful update from the feed, the feed manager will provide two different dates:

  • last_update will be the timestamp of the last successful update from the feed. This date may be useful if the consumer of this library wants to treat intermittent errors from feed updates differently.
  • last_timestamp will be the latest timestamp extracted from the feed data. This requires that the underlying feed data actually contains a suitable date. This date may be useful if the consumer of this library wants to process feed entries differently if they haven't actually been updated.

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