Interactive WMTS (Web Map Tile Service)

This example demonstrates the interactive pan and zoom capability supported by an OGC web services Web Map Tile Service (WMTS) aware axes.

The example WMTS layer is a single composite of data sampled over nine days in April 2012 and thirteen days in October 2012 showing the Earth at night. It does not vary over time.

The imagery was collected by the Suomi National Polar-orbiting Partnership (Suomi NPP) weather satellite operated by the United States National Oceanic and Atmospheric Administration (NOAA).

Traceback (most recent call last):
  File "/home/circleci/project/examples/web_services/wmts.py", line 36, in <module>
    main()
  File "/home/circleci/project/examples/web_services/wmts.py", line 28, in main
    ax.add_wmts(url, layer)
  File "/home/circleci/project/lib/cartopy/mpl/geoaxes.py", line 2257, in add_wmts
    wmts = WMTSRasterSource(wmts, layer_name,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/circleci/project/lib/cartopy/io/ogc_clients.py", line 379, in __init__
    wmts = owslib.wmts.WebMapTileService(wmts)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/circleci/.local/lib/python3.11/site-packages/owslib/wmts.py", line 197, in __init__
    self._buildMetadata(parse_remote_metadata)
  File "/home/circleci/.local/lib/python3.11/site-packages/owslib/wmts.py", line 248, in _buildMetadata
    gather_layers(caps, None)
  File "/home/circleci/.local/lib/python3.11/site-packages/owslib/wmts.py", line 239, in gather_layers
    cm = ContentMetadata(
         ^^^^^^^^^^^^^^^^
  File "/home/circleci/.local/lib/python3.11/site-packages/owslib/wmts.py", line 819, in __init__
    raise ValueError(
ValueError: <Element {http://www.opengis.net/wmts/1.0}Dimension at 0x7f1a257303c0> list of values can not be empty

import matplotlib.pyplot as plt

import cartopy.crs as ccrs


def main():
    url = 'https://map1c.vis.earthdata.nasa.gov/wmts-geo/wmts.cgi'
    layer = 'VIIRS_CityLights_2012'

    fig = plt.figure()
    ax = fig.add_subplot(1, 1, 1, projection=ccrs.PlateCarree())
    ax.add_wmts(url, layer)
    ax.set_extent([-15, 25, 35, 60], crs=ccrs.PlateCarree())

    ax.set_title('Suomi NPP Earth at night April/October 2012')
    plt.show()


if __name__ == '__main__':
    main()