gis on rails by oleksandr kychun
TRANSCRIPT
GIS on RailsIntegrate GIS into your Rails application using OpenGeo
Suite
GIS
Data representation
Raster vs Vector● Points
● Lines
● Polygons
● Ubuntu 12.04, 14.04
● Mac OS X● Red Hat
Enterprise Linux and CentOS.
● Windows
Problem: Store and serve data that comes in shapefiles
Postgis Geoserver OpenLayers
provides spatial objects for PostgreSQL
provides advanced web mapping capabilities
powerful map and feature server for sharing,
analyzing, and editing geospatial data
GeoServer Web interface
Typically, to create layer that could be presented to the end user, you’ll need to complete 3 steps
● Create a workspace. ● Create storage.(Shapefile vs Postgis)● Publish a layer
Public APIGeoserver Configuration Api Composer Api
Postman probes
Requirements
● simple curl based communicator○ wrapper around curb gem
● postgresql client○ pg gem
● background processing lib○ resque gem
● unzipper○ rubyzip and zip-zip gems
● shapefile import tool○ shp2pgsql
Import process
● submit form● active record saves the object and triggers callback after commit● callback adds GeoserverTask to the queue ● resque worker initializes the handler(layer_creator)● handler processes the request
○ creates workspace○ creates storage○ creates database if missing○ unpacks zip file○ imports data from shapefile to created table○ publishes layer
Results