Create coordinate converter for [0,360] to [-180,180]

[bikegeek]

Describe the Task

Create a utility to convert longitudes that range from 0 to 360 to those that range from -180 to 180 (ie West-East). Read in a numpy array or list of longitudes and return a numpy list of longitudes. Use the formula lon_west_east = ((lon_360 + 180.0) % 360.0 ) - 180.0 where '%' is the modulo operator.

Time Estimate

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This should take one day including writing tests.

Sub-Issues

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• Create the feature branch from the develop branch
• Add a function to the util/utils.py module
• Write parametrized unit test in pytest

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Assignee

• Select engineer(s) Minna Win
• Select scientist(s) Tina Kalb

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Define Related Issue(s)

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• METplus, MET, METdatadb, METviewer, METexpress, METcalcpy, METplotpy

Task Checklist

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• Complete the issue definition above.
• [x ] Fork this repository or create a branch of develop.
  Branch name: feature_<Issue Number>_<Description>
• Complete the task and verify your changes.
• Add/update unit tests.
• Add/update documentation.
• Push local changes to GitHub.
• Submit a pull request to merge into develop and link the pull request to this issue.
  Pull request: feature <Issue Number> <Description>
• Iterate until the reviewer(s) accept and merge your changes.
• Delete your fork or branch.
• Close this issue.