Paegan attempts to fill the need for a high level common data model (CDM) library for array based met/ocean data stored in netCDF files or distributed over OPeNDAP.
from paegan.cdm.dataset import CommonDataset
url = "http://thredds.axiomalaska.com/thredds/dodsC/PWS_DAS.nc"
pd = CommonDataset.open(url)
#####Bbox
pd.restrict_bbox((-74, 40, -70, 42))
#####Time
from datetime import datetime,timedelta
ending = datetime.utcnow()
starting = ending - timedelta(hours=12)
pd.restrict_time((starting, ending))
#####Depth
pd.restrict_depth((3,50))
#####Variables
pd.restrict_vars(("u","v"))
#####Time
from datetime import datetime
import pytz
now = datetime.utcnow().replace(tzinfo=pytz.utc)
pd.nearest_time(now)
#####Depth
pd.nearest_depth(5)
You are using virtualenv
, right?
- Install virtualenv-burrito
- Create virtualenv named "paegan-dev":
mkvirtualenv -p your_python_binary paegan-dev
- Start using your new virtualenv:
workon paegan-dev
Paegan requires python 2.7.x and is available on PyPI.
The best way to install Paegan is through pip:
pip install paegan
Paegan requires the following python libraries which will be downloaded and installed through pip
:
- numpy==1.6.2
- netCDF4==1.0.2 (requires netcdf and hdf5 C libraries)
- Shapely==1.2.17 (requires geos C library)
- pytz==2012h
- python-dateutil==2.1
If your NetCDF4 and HDF5 libraries are in non-typical locations, you will need to pass the locations to the pip
command:
NETCDF4_DIR=path HDF5_DIR=path pip install paegan
There seems to be a problem installing numpy through pip
so you may need to install numpy before doing any of the above:
pip install numpy==1.6.2
- CF-1.6 Discrete Sampling Geometry support
- Better grid support
- Regridding tools
Other modules making use of Paegan
- paegan-transport - Parallelized Lagrangian transport model for NetCDF/OPeNDAP data
- paegan-viz - Visualization tools for NetCDF/OPeNDAP data
If you are having trouble getting any of the paegan functionality to work, try running the tests:
git clone git@github.com:asascience-open/paegan.git`
cd paegan
pip install pytest
python runtests.py
- Kyle Wilcox kwilcox@asascience.com
- Alex Crosby acrosby@asascience.com