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UID:pretalx-foss4g-2022-GPPKXW@talks.staging.osgeo.org
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DESCRIPTION:## Abstract\n\n[pygeofilter](https://github.com/geopython/pygeo
 filter/) is a library to support the integration of geospatial filters. It
  is split into frontend language parsers (CQL 1 + 2 text/JSON\, JFE\, FES)
  \, a common Abstract Syntax Tree (AST) representation and several backend
 s (database systems) where the parsed filters can be integrated into queri
 es.\n\n## Parsers\n\nCurrently pygeofilter supports CQL 1\, CQL 2 in both 
 text and JSON encoding\, OGC filter encoding specification (FES) and JSON 
 filter expressions (JFE) as input languages. Additionally pygeofilter prov
 ides utilities to help create parsers for new filter languages.\nThe filte
 rs are parsed to an AST representation\, which is a common denominator acr
 oss all filter capabilities including logical and arithmetic operators\, g
 eospatial comparisons\, temporal filters and property lookups. An AST can 
 also be easily created via the API\, if necessary.\n\n## Backends\n\npygeo
 filter provides several backends and helpers to roll your own. Built-in ba
 ckends are for Django\, SQLAlchemy\, raw SQL\, (Geo)Pandas dataframes\, an
 d native Python lists of dicts or objects.\n\n## Usage\n\npygeofilter is u
 sed in several applications\, such as [PyCSW](https://pycsw.org/)\, [EOxSe
 rver](https://github.com/EOxServer/eoxserver/) and [ogc-api-fast-features]
 (https://github.com/microsoft/ogc-api-fast-features/)
DTSTAMP:20260403T215402Z
LOCATION:Room Onice
SUMMARY:pygeofilter: geospatial filtering made easy - Fabian Schindler-Stra
 uss
URL:https://talks.staging.osgeo.org/foss4g-2022/talk/GPPKXW/
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