[SoC] GSoC 2020 - Introduction - Farheen Bano - Adding CQL feature filtering support to pygeoapi

Farheen Bano farheenbano94 at gmail.com
Tue May 19 08:13:29 PDT 2020

Hi Community Members,

The weekly updates of my work can be found on my wiki pg
https://wiki.osgeo.org/wiki/User:FarheenBano, where I will report about my

Farheen Bano

On Tue, May 19, 2020 at 5:48 PM Farheen Bano <farheenbano94 at gmail.com>

> Dear Community Members,
> My name is Farheen Bano. I have done my B.Tech in Computer Science
> Engineering from West Bengal University of Technology. I am currently
> pursuing my Master's in Geo-informatics Engineering under Centre of Studies
> in Resources Engineering from Indian Institute of Technology Bombay,
> Mumbai, India.
> My LinkedIn profile - https://www.linkedin.com/in/farheen-bano/
> My GitHub account - https://github.com/FarheenB
> Firstly, I would like to thank all the community members of OSGeo and
> pygeoapi for giving me this opportunity. I am honoured to be considered for
> this opportunity and feel valuable to the community. I have always been an
> active contributor to Open Source software development. I am really excited
> on working with OSGeo community and pygeoapi mentors and have a happy
> learning summer.
> My project for GSoC 2020 is “Adding CQL feature filtering support to
> pygeoapi” which follows OGC API suit of standards. Details of my proposal
> can be found here
> https://summerofcode.withgoogle.com/projects/#5759857581359104
> pygeoapi is a Python server implementation of the OGC API suite of
> standards. To be able to filter features of geospatial collections is an
> essential functionality that should be available in a geospatial API. But
> this functionality has not yet been implemented in pygeoapi. For GSoC I
> proposed to develop the filters for OGC Feature API. The filters would be
> implemented at collection level *(following OGC Feature API Collection
> Definitions)* in CQL.
> OGC API standards define modular API building blocks to spatially enable
> Web API in a consistent way. OGC API Features provides API building blocks
> to create, modify and query features on the Web. OGC API Features is
> comprised of multiple parts, each of them is a separate standard which I
> will be following during the development of this project.
> On developing API with JSON encoding for CQL, any combination
> of bbox, datetime and parameters for filtering on feature properties will
> be allowed. The requirements on these parameters imply that only features
> matching all the predicates are in the result set. i.e., the logical
> operator between the predicates is 'AND'. The API definition may be used to
> determine details, e.g., on filter parameters, but this may not be
> necessary depending on the needs of the client. These are clients that are
> in general able to use multiple APIs as long as it implements OGC API
> Features.
> If features in the feature collection include a feature property that has
> a simple value (for example, a string or integer) that is expected to be
> useful for applications using the service to filter the features of the
> collection based on this property, a parameter with the name of the feature
> property and with the characteristics (using an OpenAPI Specification 3.0
> fragment) should be supported. The schema property will be the same as the
> definition of the feature property in the response schema.
> My aim is to develop an efficient code to contribute to pygeoapi with
> simple as well as advance feature filtering functionality using CQL. I will
> develop efficient and least time computing, complex filter based APIs which
> would add on high value to the existing system. This functionality that I
> intend to develop will give pygeoapi an advantage in the GIS community
> because this helps in delivering appropriate results based on the set of
> conditions specified by the client. Thus increases the client’s usage
> capabilities.
> I will be implementing this project on GitHub Repository
> https://github.com/FarheenB/pygeoapi and will update my work progress
> regularly on the wiki page *(The request to edit the OSGeo GSoC wiki page
> with user name FarheenBano is not yet approved)*
> Will be glad to receive any suggestions and feedback from the community :-)
> Regards,
> Farheen Bano
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