Gisaf

Gisaf is a web based GIS (Geographical Information System) initially developed for the CSR Goematics unit in Auroville, India.

Its main audiences are local administrations which need a platform to develop and maintain a geographical, topological and environmental data, allow teams of surveyors to upload data and update the GIS in near real time, and collect data from a wide range of sources.

Although it just works out of the box, it is primarily intended to be customized and extended with the data, uses, needs.

Features

• Layers defined with Python plugins or ANSI-standard categories
• Open source industry standard interfaces (PostGIS database, OGCAPI)
• Support of different geographical projections
• Integrated administration interface
• Export of data from standard formats (Geopackage, Shapefile)
• Import and update of data managed in a well defined workflow with "baskets"
• Acquisition of different kinds of surveyors' equipments, accuracies
• Robust mechanisms of identification of the data sources, survey times
• Geographical feature statuses (eg. Existing, Deprecated, Future)
• Role-based access to data
• Support temporal and other data for different features
• Easy integration with IoT sensors, eg. using the MQTT protocol
• Detailed information for all features
• Tagging of features
• Customizable, user triggered actions
• Background map
• Customizable base maps (domain specific set of layers)
• Plugin architecture: add functions with Python packages
• Free and open source

Software stack

• Python: the Swiss Army knife language
• Pydantic: the power of typing
• FastAPI: web wizzard
• SQLModel: SQL (ORM)
• Postgis: geographical extension for the PostGresql database
• Pandas and Geopandas: the data jugglers

Installation / deployment

See the documentation in the deployment directory.

Configuration

Documentation is being rewritten. Please contact us.

Demo

A very basic demo without any data, basically to give a feel of the user interface, is available here.