Reading and Writing Files¶
Reading Spatial Data¶
geopandas can read almost any vector-based spatial data format including ESRI shapefile, GeoJSON files and more using the command:
which returns a GeoDataFrame object. (This is possible because geopandas makes use of the great fiona library, which in turn makes use of a massive open-source program called GDAL/OGR designed to facilitate spatial data transformations).
Any arguments passed to
read_file() after the file name will be passed directly to
fiona.open, which does the actual data importation. In general,
read_file is pretty smart and should do what you want without extra arguments, but for more help, type:
import fiona; help(fiona.open)
Among other things, one can explicitly set the driver (shapefile, GeoJSON) with the
driver keyword, or pick a single layer from a multi-layered file with the
geopandas can also get data from a PostGIS database using the
Writing Spatial Data¶
GeoDataFrames can be exported to many different standard formats using the
GeoDataFrame.to_file() method. For a full list of supported formats, type
import fiona; fiona.supported_drivers.