[GIS] GeoPandas GeoDataFrame plot statistics – how

geopandaspandaspython

The plot method of a GeoPandas GeoDataFrame overrides the DataFrame parent method to plot the geometries of the associated GeoSeries. This is very convenient, but I'd also like to use the easy ways Pandas provides to plot other properties of my dataset.

However, when I now try to make a scatterplot, or any other kind of plot, I get an error message:

mygeodataframe.plot(kind='scatter', x='somecolumn', 'y'='someothercolumn'...)
*** TypeError: plot_dataframe() got an unexpected keyword argument 'kind'

How do I get my plotting methods back? Converting a copy of the GeoDataFrame (minus the 'geometry' Series) into regular DataFrame helps, but it's clumsy.

I'm using GeoPandas version 0.1.1 and Pandas version 0.17.1.

Best Answer

The GeoPandas plotting methods are there for convenience. They do override the standard pandas plotting methods. For now, the easiest way to get access to basic pandas plotting is probably through their functional versions, something like this:

from pandas.tools.plotting import plot_frame
plot_frame(mygeodataframe, kind='scatter', ...)

Feel free to create an issue about this on the GitHub repository (or better yet, help implement a solution).

Related Solutions

[GIS] GeoPandas to_file() saves GeoDataFrame without coordinate system

I have come across this behavior before.

You need to explicitly pass the well known text (crs_wkt) string to the to_file() method. The string will then get passed to fiona.open(), which writes out the .prj file.

Using your sample code, doing something like this:

ws = r"D:\temp_se"
prj_file = gpd.datasets.get_path('naturalearth_lowres').replace(".shp",".prj")
prj = [l.strip() for l in open(prj_file,'r')][0]
world = gpd.read_file(gpd.datasets.get_path('naturalearth_lowres'))
temp_shp = os.path.join(ws,"world_out.shp")
world.to_file(filename=temp_shp,driver='ESRI Shapefile',crs_wkt=prj)

should produce:

The read_file() and to_file() functions simply serve as wrapper functions. They call fiona.open(), whose signature is shown below:

You need to explicitly pass a crs_wkt value when reading/writing files with geopandas.

[GIS] Create GPS (gpx) routes from GeoPandas geodataframe

To test my approach, I loaded a shapefile as GeoPandas geodataframe and, afterwards, I saved it as gpx file. This is the code:

import geopandas as gpd

lines = gpd.read_file('/home/zeito/pyqgis_data/my_lines.shp')

lines.to_file('/home/zeito/pyqgis_data/my_lines.gpx', 'GPX')

When gpx layer is loaded at Map Canvas, it could be observed that it works perfectly.

Best Answer

Related Solutions

[GIS] GeoPandas to_file() saves GeoDataFrame without coordinate system

[GIS] Create GPS (gpx) routes from GeoPandas geodataframe

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