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Feature 933 cartopy hpc #964

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Jun 24, 2021
Merged

Feature 933 cartopy hpc #964

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2e174e9
Modification to use NaturalEarth shapefiles that are already downloaded
May 19, 2021
462b1e2
Github Issue #933 Check for CARTOPY_DIR first, if unset, then proceed as
May 21, 2021
b0641db
updated documentation for offline systems
j-opatz May 27, 2021
076d558
Updated docs based on feedback
j-opatz Jun 24, 2021
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8 changes: 8 additions & 0 deletions docs/Users_Guide/installation.rst
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Expand Up @@ -121,6 +121,14 @@ to run.
- cartopy (0.17.0)
- matplotlib (3.3.4)

Cartopy, one of the dependencies of CyclonePlotter, attempts to download shapefiles from the internet to complete successfully. So if CyclonePlotter is run on a closed system (i.e. no internet), additional steps need to be taken. First, go to the Cartopy repository and download the tarball for Natural Earth shapefiles. The categories should include

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- coastline
- land
- ocean

at 110m and 50m for each, and each should have the proper files (.dbf, .shp, .shx). Untar this file in a noted location. Finally, create an environment variable in the user-specific system configuration file for CARTOPY_DIR, setting it to the location where the shapefiles are located.
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.. _getcode:

Getting the METplus Wrappers source code
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3 changes: 2 additions & 1 deletion docs/Users_Guide/wrappers.rst
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Expand Up @@ -132,7 +132,8 @@ Description

This wrapper does not have a corresponding MET tool but instead wraps
the logic necessary to create plots of cyclone tracks. Currently only
the output from the MET tc-pairs tool can be plotted.
the output from the MET tc-pairs tool can be plotted. If used on an internet-limited system,
additional dependencies may apply. See :ref:`install` for details.

METplus Configuration
---------------------
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7 changes: 7 additions & 0 deletions metplus/wrappers/cyclone_plotter_wrapper.py
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Expand Up @@ -19,7 +19,14 @@
import matplotlib.ticker as mticker
import cartopy.crs as ccrs
import cartopy.feature as cfeature
import cartopy
from cartopy.mpl.gridliner import LONGITUDE_FORMATTER, LATITUDE_FORMATTER
##If the script is run on a limited-internet access machine, the CARTOPY_DIR environment setting
##will need to be set in the user-specific system configuration file. Review the Installation section
##of the User's Guide for more details.
if os.getenv('CARTOPY_DIR'):
cartopy.config['data_dir'] = os.getenv('CARTOPY_DIR', cartopy.config.get('data_dir'))

except Exception as err_msg:
WRAPPER_CANNOT_RUN = True
EXCEPTION_ERR = err_msg
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