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Plot trajectory and Grid data from transparentPng ERDDAP outputs: #401

Description

@JessyBarrette

ERDDAP can generate a transparent PNG output that can be easily added as a layer over CDE to present the extent of a trajectory dataset or grid dataset

The following notebook present the following two examples:
https://colab.research.google.com/drive/1n8KIHJm12a4SAu99gHoI1UomjUrfMtk-?usp=sharing

This method relies extensively on the server-side transformation which reduces the data transferred and speeds up the whole process.

Grid Datasets

The following notebook presents an example to retrieve a grid data figure from an ERDDAP Dataset and plot it on the map by relying on the kml output form erddap
Screenshot 2023-03-27 at 10 09 56 AM

Trajectory datasets

And a similar method is used to download a specific trajectory ID for a specific lat/long range and plot it on a map.

Screenshot 2023-03-27 at 10 10 29 AM

Issues

The present code which is relying on Folium to generate the figures cannot handle data exceeding the +/-85 deg latitude.

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