Skip to main content

Subset National Water Model (NWM) NetCDF Ver1.1

Project description

# Subset National Water Model (NWM) NetCDF

Note that the deployment schedule of new National Water Model (NWM) Ver1.1 got delayed until May 4th 2017 according to its official notice:

NWM's daily output is about 400GB worth of NetCDF files that contain meteorological and hydrologic data/forecasts covers the whole U.S.
This python library enables users to subset NWM Ver1.1 NetCDF using a polygon that represents a region of interest, which can significantly reduce data storage size and speed up regional data access.

More about NWM:

## Version naming convention:
"1.1.3", where "1.1" means NWM Ver1.1 and "3" is the version of this library.

## Workflow:
user-provided polygon --> Spatial Query module* --> stream comids & reservoir comids & grid cells (forcing & land & terrain) -->
Subset module --> Merge module --> regional NetCDF files

*: Spatial Query is optional if user directly provides stream comids & reservoir comids & grid cells

## Usage
See in source

The copy of the resulting NetCDF files of TwoMileCreek watershed can be found at

The watershed poylgon shapefiel is at /

## What's new in 1.1.3 ?
1) Support subsetting more files:

1-1) "tm01" and "tm02" of each time stamp in analysis_assim model configuration

1-2) the "terrain" files in all model configurations

2) speed up spatial query on grid files (forcing, land and terrain) using GDAL and further reduce size of supporting files

3) add GDAL as a new dependency

## Environment and Dependencies:
Preliminary functional testings passed with Python 2.7.12 x64 on Windows 7 x64 and Ubuntu 16.04 x64.

### Spatial Query module:

1) fiona @

2) shapely @

3) pysqlite with mod_spatialite extension @ and

4) GDAL 2.1 or later @

5) spatial query supporting files @

### Subset & Merge module

1) NetCDF utilities (shell commands) @

2) NCO (shell commands) @

3) numpy @

4) netCDF4 python lib @

5) sed (shell command)

Implementation inspired by:

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for subset-nwm-netcdf, version 1.1.3
Filename, size File type Python version Upload date Hashes
Filename, size subset_nwm_netcdf-1.1.3.tar.gz (1.1 MB) File type Source Python version None Upload date Hashes View

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring DigiCert DigiCert EV certificate Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page