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Roadmap

This document is meant to provide transparency in planning and implementation goals for the Koop project.

v2.x / Minor Changes

To be completed in the near future - September/October 2015

Improvements

Error handling, reporting, logging

Better plugin support

koopjs/koop#195

make preview routes a plugin

Identical or near-identical JS & HTML is being duplicated across providers for previews. If we improve plugin support enough in v2, we should be able to remove preview code from all providers and make a simple plugin that adds a preview route to every provider. I think this would be a good candidate for designing a better plugin strategy.

Changes

Provider inheritance

via koop-provider module

Worker & Export manangement

Exporter & ExportWorker should be broken out into separate modules.

v3

Removals

  • remove from lib/: Exporter, ExportWorker, BaseModel, BaseController, FeatureServices, Query, & SpatialReference

These modules will be deprecated in v2 once the koop-provider, koop-exporter, and koop-worker modules are production ready.

--

Theoretical / tentative discussion

Major API changes:

Provide better support for plugins. Right now the model for creating a plugin is pretty poor, as illustrated by koopjs/koop#195.

Move away from provider in favor of three new types of plugins: source, export, and interface.

This can be thought of more or less like so:

server/koop/:source{/**}/:item{.:export,/:interface}

Source

Defines methods for extracting data from a third party source and transforming it into standard GeoJSON. Handles registering hosts if necessary.

This definition is looser than a provider in that it encompasses any kind of data source, not just open data providers.

Ideally a source plugin is more focused, meaning that

  • (b) it is only concerned with the specifics of its data source and how to hand that data over to koop
  • (c) it does not interact directly with the koop cache in any way
  • (a) it is less tightly coupled to express and has as little knowledge of server requests and responses as necessary

Addresses:

  • lib/ refactor
  • better encapsulation
  • BaseModel & BaseController issues & limitations

Module naming convention:

koop-source-*

e.g.

koop-source-agol
koop-source-socrata
koop-source-ckan

Methods:

  • extract (internal method, can be used by itself, e.g. require(koop-source-agol/extract))
  • transform (internal method, can be used by itself, e.g. require(koop-source-agol/transform))
  • fetch (primary method used by koop core to request data from source)

Export

Defines methods for exporting GeoJSON to a static format. This means KML, CSV, Shapefile, etc. This plugin would exist exclusively to encapsulate logic for downloading data in a specific format.

Addresses:

  • Support for TopoJSON (#199)
  • File Geodatabase support
  • Removing ogr2ogr as a dependency for exporting file formats
  • lib/ refactor

Module naming convention:

koop-export-*

e.g.

koop-export-geojson
koop-export-topojson
koop-export-shapefile
koop-export-kml
koop-export-csv

Interface

Defines methods for querying GeoJSON via a third-party API. This means Feature Service, Soda2, OData, etc. This requires a lot of refactoring but would yield a lot of benefits and has the potential to set a standard interface for querying GeoJSON.

Addresses:

  • Support for OGC WFS (#163)
  • Support for OGC WMS (#164)
  • Support for Soda2 (#195)
  • Support for OData (#195)
  • Breaking out Feature Service logic (#151)
  • lib/ refactor

Module naming convention:

koop-api-*

e.g.

koop-api-featureservice
koop-api-soda2
koop-api-odata