GeoGit-Viz

Store and visualize GeoGit repos in the cloud:

• Create GeoGit repo from a local repo, GitHub, or OpenStreetMap

• Dial-a-Diff: compare any commits in the GeoGit repo history

• Download: get the latest version in GeoJSON, OSM XML, and Shapefile formats

Setup (tested on Ubuntu 12 or Mac OSX)

Download and build GeoGit

• Install git

• Download the latest version of GeoGit from OpenGeo's GitHub

    git clone https://github.com/opengeo/GeoGit.git ~/GeoGit
  

• Install GeoGit's prerequisites (Java JDK, Maven, Jetty)

• Build GeoGit / run all tests with

    cd ~/GeoGit/src/parent
    mvn clean install
  

Set up your GeoGit repo and API

• Set geogit user and e-mail. If you have issues see https://github.com/opengeo/GeoGit/issues/342

    geogit config --global user.name "Your Name"
    geogit config --global user.email "[email protected]"
  

• Create a geogit repo somewhere. If you have issues see https://github.com/opengeo/GeoGit/issues/342

    mkdir ~/mygeodata
    cd ~/mygeodata
    geogit init
  

• If you already have your data source, make your initial commit now

    geogit shp import using_a_shapefile.shp
    geogit add
    geogit commit -m "initial commit"
  

• Start geogit's built-in API server

    cd ~/GeoGit/src/parent
    mvn jetty:run -pl ../web/app -f pom.xml -Dorg.geogit.web.repository=/path/to/mygeodata/ -Djetty.port=8080
  

• Test that API server is running by going to http://localhost:8080

Set up your database

• Install and start MongoDB

• Create an environment variable called SECRETKEY

Download and build this repo (geogit-viz)

• Download geogit-viz from GitHub

    git clone https://github.com/CityOfBoston/geogit-viz.git ~/geogit-viz
  

• Install Node.js and (if not included) NPM

• Install dependencies and start server

    cd ~/geogit-viz
    npm install
    node app.js
  

• View the map at http://localhost - note that no data will be visible in your initial commit

Set up GeoGit-as-a-Service

• Install gdal and zip to create additional file formats

• Make directories /root/github, /root/makeosm, and /root/empty

• Describe services on /api, /push, /github, and /osm

Working with GeoGit

• If you have a shapefile, OSM XML, Spatialite, or PostGIS database, you can set up a local GeoGit repo

• Stop any related GeoGit web API process before importing, adding, or committing data to a repo

• Import and commit data to your GeoGit repo. The response after 'geogit commit' will let you know if any points were added, modified, or removed.

    cd ~/mygeodata
    geogit osm import ../geogit-viz/osmoutput.osm
    geogit add
    geogit commit -m "updated geodata from server"
  

• You won't see changes on the geogit-viz map until your second commit. Until then, you can verify the API is working at http://localhost:8080/geogit/log

Work with a GeoGit repo on the web

Pushing to a new repo

• On /push, create a project and copy its GeoGit URL (for example, http://geoginger.com:8080/geogit ).

• Push your GeoGit repo to the server

    geogit remote add gg GEOGIT_URL
    geogit push gg
  

Cloning an existing repo

• Find a project's GeoGit URL (for example, http://geoginger.com:8080/geogit )

• Clone the GeoGit repo from the server to a local directory

    geogit clone GEOGIT_URL /Users/username/repodirectory
  

Track a service on ArcGIS Server

• geogit-viz has two example updaters which save ArcGIS REST API service data as OSM-format XML files (/update_from_gis and /update_dev_projects)

Import a repo from GitHub

Are you already sharing maps on GitHub? GeoGit can import your GeoJSON files into a GeoGit commit history.

• Register an OAuth application on GitHub: https://github.com/settings/applications/new

• Add your OAuth keys as environment variables GITHUBCLIENTID and GITHUBCLIENTSECRET

• Put the script inside user/project111 directory or set repo in generatefromgithub.py to 'user/project'

• Create and populate the repo using this script

    python3 generatefromgithub.py
  

• Apply future updates using this script:

    python3 updatefromgithub.py
  

Applications

• GeoGit script keeps track of changes to the city's data via ArcGIS REST API

• Show changes to a dataset or a data-collection project over time

• Track changes to OpenStreetMap

• User exports data in preferred format

• User can retrieve all changes since their download by sending a commit ID to the JSON API

• User can clone a GeoGit repo and use it to keep sources of a TileMill map in sync with the GeoGit repo