title: Is there a way to fix this import error for geopandas?
body: <p>I am trying to get GemGIS to work. During the installation process I installed the libaries <em><strong>geopandas</strong></em> and <em><strong>gemgis</strong></em> in my enviroment through:</p>
  <p><code>conda install -c conda-forge geopandas</code></p>
  <p>and</p>
  <p><code>pip install gemgis</code></p>
  <p>I used the anaconda powershell and everything seemed okay. When I started jupyter lab and tried to import those packages I got the following error code:</p>
  <pre><code>---------------------------------------------------------------------------
  OSError                                   Traceback (most recent call last)
  &lt;ipython-input-24-a62d01c1d62e&gt; in &lt;module&gt;
  ----&gt; 1 import geopandas as gpd
  
  G:\Programme\anaconda3\envs\gemgis\lib\site-packages\geopandas\__init__.py in &lt;module&gt;
  ----&gt; 1 from geopandas._config import options  # noqa
        2 
        3 from geopandas.geoseries import GeoSeries  # noqa
        4 from geopandas.geodataframe import GeoDataFrame  # noqa
        5 from geopandas.array import points_from_xy  # noqa
  
  G:\Programme\anaconda3\envs\gemgis\lib\site-packages\geopandas\_config.py in &lt;module&gt;
      124 use_pygeos = Option(
      125     key=&quot;use_pygeos&quot;,
  --&gt; 126     default_value=_default_use_pygeos(),
      127     doc=(
      128         &quot;Whether to use PyGEOS to speed up spatial operations. The default is True &quot;
  
  G:\Programme\anaconda3\envs\gemgis\lib\site-packages\geopandas\_config.py in _default_use_pygeos()
      110 
      111 def _default_use_pygeos():
  --&gt; 112     import geopandas._compat as compat
      113 
      114     return compat.USE_PYGEOS
  
  G:\Programme\anaconda3\envs\gemgis\lib\site-packages\geopandas\_compat.py in &lt;module&gt;
      147 RTREE_GE_094 = False
      148 try:
  --&gt; 149     import rtree  # noqa
      150 
      151     HAS_RTREE = True
  
  G:\Programme\anaconda3\envs\gemgis\lib\site-packages\rtree\__init__.py in &lt;module&gt;
        7 __version__ = '0.9.7'
        8 
  ----&gt; 9 from .index import Rtree, Index  # noqa
  
  G:\Programme\anaconda3\envs\gemgis\lib\site-packages\rtree\index.py in &lt;module&gt;
        4 import pprint
        5 
  ----&gt; 6 from . import core
        7 
        8 import pickle
  
  G:\Programme\anaconda3\envs\gemgis\lib\site-packages\rtree\core.py in &lt;module&gt;
       73 
       74 # load the shared library by looking in likely places
  ---&gt; 75 rt = finder.load()
       76 
       77 rt.Error_GetLastErrorNum.restype = ctypes.c_int
  
  G:\Programme\anaconda3\envs\gemgis\lib\site-packages\rtree\finder.py in load()
       65             finally:
       66                 os.environ['PATH'] = oldenv
  ---&gt; 67         raise OSError(&quot;could not find or load {}&quot;.format(lib_name))
       68 
       69     elif os.name == 'posix':
  
  OSError: could not find or load spatialindex_c-64.dll
  '''
  
  Does anyone know how to fix this? I looked up the paths and saw, that the core.py data had similar codes as requested, but the **64** was missing at the end of the spatialindex_c-.dll 
  </code></pre>