I’m attempting to create custom polygons to break up the globe based on latitude. I want to create a stripe around the globe at every 15 degrees latitude. I created a dataframe to pass to gv.Polygons() but I am getting a ValueError whenever I try. Below is my code for creating the globeLat dataframe:
globeLat = pd.DataFrame(columns = ['zone', 'geometry'])
for i in range(int(90/10)):
p1 = [-90, (i*10)-90.00000]
p2 = [90, (i*10)-90.00000]
p3 = [90, ((i+1)*10)-90.00000]
p4 = [-90, ((i+1)*10)-90.00000]
pointList = [p1, p2, p3, p4, p1]
poly = geometry.Polygon(pointList)
globeLat.loc[i] = [(i*15-180) , poly]
display(globeLat)
I then try to use the globeLat dataframe with gv.Polygons() and get a ValueError. The line I try to call is below:
polys = gv.Polygons(shapesDF, vdims = ['zone']).opts(width = 800, height = 400)
This produces the following error:
ValueError Traceback (most recent call last)
<ipython-input-28-d1c663f14ed1> in <module>
5 points = data.to(gv.Points, ['Longitude', 'Latitude'], ['Temperature(C)'])
6 # osm_map = gv.tile_sources.OSM
----> 7 polys = gv.Polygons(shapesDF, vdims = ['zone']).opts(width = 800, height = 400)
8 oceanMap = gf.ocean()
9 oceanMap.opts(width = 800, height = 400) * polys * points.opts(tools=['hover'], size=10)
~\Anaconda3\envs\geoviews_test\lib\site-packages\geoviews\element\geo.py in __init__(self, data, kdims, vdims, **kwargs)
108 elif isinstance(data, _Element):
109 kwargs['crs'] = data.crs
--> 110 super(_Element, self).__init__(data, kdims=kdims, vdims=vdims, **kwargs)
111
112
~\Anaconda3\envs\geoviews_test\lib\site-packages\holoviews\element\path.py in __init__(self, data, kdims, vdims, **params)
262 else:
263 params['vdims'] = vdims
--> 264 super(Contours, self).__init__(data, kdims=kdims, **params)
265 if params.get('level') is not None:
266 with disable_constant(self):
~\Anaconda3\envs\geoviews_test\lib\site-packages\holoviews\element\path.py in __init__(self, data, kdims, vdims, **params)
83 data = paths
84
---> 85 super(Path, self).__init__(data, kdims=kdims, vdims=vdims, **params)
86
87
~\Anaconda3\envs\geoviews_test\lib\site-packages\holoviews\element\selection.py in __init__(self, *args, **kwargs)
19
20 def __init__(self, *args, **kwargs):
---> 21 super(SelectionIndexExpr, self).__init__(*args, **kwargs)
22 self._index_skip = False
23
~\Anaconda3\envs\geoviews_test\lib\site-packages\holoviews\core\data\__init__.py in __init__(self, data, kdims, vdims, **kwargs)
342 datatype=kwargs.get('datatype'))
343 (data, self.interface, dims, extra_kws) = initialized
--> 344 super(Dataset, self).__init__(data, **dict(kwargs, **dict(dims, **extra_kws)))
345 self.interface.validate(self, validate_vdims)
346
~\Anaconda3\envs\geoviews_test\lib\site-packages\holoviews\core\dimension.py in __init__(self, data, kdims, vdims, **params)
852 params['cdims'] = {d if isinstance(d, Dimension) else Dimension(d): val
853 for d, val in params['cdims'].items()}
--> 854 super(Dimensioned, self).__init__(data, **params)
855 self.ndims = len(self.kdims)
856 cdims = [(d.name, val) for d, val in self.cdims.items()]
~\Anaconda3\envs\geoviews_test\lib\site-packages\holoviews\core\dimension.py in __init__(self, data, id, plot_id, **params)
511 params['group'] = long_name
512
--> 513 super(LabelledData, self).__init__(**params)
514 if not util.group_sanitizer.allowable(self.group):
515 raise ValueError("Supplied group %r contains invalid characters." %
~\Anaconda3\envs\geoviews_test\lib\site-packages\param\parameterized.py in __init__(self, **params)
2520
2521 self.param._generate_name()
-> 2522 self.param._setup_params(**params)
2523 object_count += 1
2524
~\Anaconda3\envs\geoviews_test\lib\site-packages\param\parameterized.py in override_initialization(self_, *args, **kw)
1063 original_initialized = parameterized_instance.initialized
1064 parameterized_instance.initialized = False
-> 1065 fn(parameterized_instance, *args, **kw)
1066 parameterized_instance.initialized = original_initialized
1067 return override_initialization
~\Anaconda3\envs\geoviews_test\lib\site-packages\param\parameterized.py in _setup_params(self_, **params)
1311 self.param.warning("Setting non-parameter attribute %s=%s using a mechanism intended only for parameters", name, val)
1312 # i.e. if not desc it's setting an attribute in __dict__, not a Parameter
-> 1313 setattr(self, name, val)
1314
1315 @classmethod
~\Anaconda3\envs\geoviews_test\lib\site-packages\param\parameterized.py in _f(self, obj, val)
316 instance_param.__set__(obj, val)
317 return
--> 318 return f(self, obj, val)
319 return _f
320
~\Anaconda3\envs\geoviews_test\lib\site-packages\param\parameterized.py in __set__(self, obj, val)
890 val = self.set_hook(obj,val)
891
--> 892 self._validate(val)
893
894 _old = NotImplemented
~\Anaconda3\envs\geoviews_test\lib\site-packages\param\__init__.py in _validate(self, val)
1386 if min_length is not None and max_length is not None:
1387 if not (min_length <= l <= max_length):
-> 1388 raise ValueError("%s: list length must be between %s and %s (inclusive)"%(self.name,min_length,max_length))
1389 elif min_length is not None:
1390 if not min_length <= l:
ValueError: kdims: list length must be between 2 and 2 (inclusive)
I have used the same code with a shapefile I downloaded from here, and it works…the issue is the shapefile doesn’t recognize a lot of points in my data set. Is there something wrong with the way I built my custom dataframe?
EDIT: If it helps, here is my GitHub repo: https://github.com/JSLifeform/Ocean-Temperature-Comparisons/tree/broken
EDIT 2: I realized that I was using 360 degrees when it shoudl only be 180, fixed that but my issue remains.
