localco.de

A Local Code Web Application for managing and serving GIS data and using the topology library to calculate shortest paths connecting aggregated parcels.

Apps that need to be installed for this to work:

• textbits (which depends on markdown2)
• topology

The app currently uses a PostGIS database and requires the geoDjango libraries.

Installation (Ubuntu 14.04)

username is reblock

sudo apt-get install python-dev python-virtualenv python-pip postgresql-9.3-postgis-2.1 postgresql-server-dev-9.3 python-numpy python-scipy
sudo apt-get install git
git clone https://github.com/open-reblock/localco.de.git localcode
cd localcode
virtualenv --system-site-packages venv
. venv/bin/activate
sudo apt-get install aptitude
sudo aptitude install libblas-dev liblapack-dev
sudo apt-get install libatlas-base-dev gfortran

pip install -r requirements.txt
sudo apt-get install rabbitmq-server

git clone https://github.com/bengolder/textbits
git clone https://github.com/open-reblock/topology

Installation (RedHat 6.08)

sudo yum install python-virtualenv python-pip python-numpy python-matplotlib python-scipy
sudo rpm -ivh http://yum.postgresql.org/9.3/redhat/rhel-6-x86_64/pgdg-redhat93-9.3-1.noarch.rpm
yum install postgresql93 postgresql93-server postgresql93-libs postgresql93-contrib postgresql93-devel
sudo yum install postgis2_93
yum install pgrouting_93
git clone https://github.com/open-reblock/localco.de localcode
cd localcode
virtualenv --system-site-packages venv
. venv/bin/activate
pip install -r requirements.txt
git clone https://github.com/bengolder/textbits
git clone https://github.com/open-reblock/topology

pip install networkx pyshp plotly

Configuration

Set my_path in settings.py to the parent directory of your working copy. Use the mysettings.pytemplate, change the MEDIA_ROOT according to the username(reblock) change `mysettings.py' database info

echo PW='"postgrespass"' > pw.py
sudo -u postgres createuser --superuser $USER
sudo -u postgres psql
postgres=# \password $USER
psql
create database open_reblock;

# (edit /etc/postgresql/9.3/main/pg_hba.conf to change all connections to trust)
sudo /etc/init.d/postgresql restart

sudo -u postgres psql -d open_reblock -c "create extension postgis"

python manage.py syncdb

Starting

Django:

python manage.py runserver 0.0.0.0:8000

Celery:

python manage.py celery -A tasks worker --loglevel=info

(N.b. the 0.0.0.0 is to allow connections from hosts other than localhost. This is necessary if running in a VM, for example.)

Troubleshooting

If you see an error like django.contrib.gis.geos.error.GEOSException: Could not parse version info string "3.4.2-CAPI-1.8.2 r3921", you'll need to manually patch venv/lib/python2.7/site-packages/django/contrib/gis/geos/libgeos.py per http://stackoverflow.com/questions/18643998/geodjango-geosexception-error

Deploying to the server

The server is running RedHat6.08. RedHat6 is running Python 2.6.6. The app and libraries were not installed on a virtualenv, so we are running Python 2.6 instead of Python 2.7.

Appendix

reblock.views.py

review

-user customized information -preview -projection -start computation in celery(run_topology.delay)

compute

-triggered after the start of the computation -redirect to steps page(templates/reblock/steps.html) -pass the project id to html page by url

reload

-called from the steps.html page to reload the final result of computation to the map

reload_step

-called from the steps.html page to reload the latest state of the computation to the map

recent

-called from home page(template/reblock/recent.html) -return the latest 3 projects to the html if applicable

recent_index

-called from home page(template/reblock/recent.html) -return the project indicated by index input to html

profile

-called from profile page(template/reblock/profile.html) -return the latest 3 projects to the html if applicable

profile_index

-called from profile page(template/reblock/profile.html) -return the project indicated by index input to html