Python Tutorial: Introduction to GeoPandas

Want to learn more? Take the full course at https://learn.datacamp.com/courses/working-with-geospatial-data-in-python at your own pace. More than a video, you'll learn hands-on coding & quickly apply skills to your daily work. --- In this video, we will start introducing spatial specific python libraries. In the last exercise, we used pandas to read a CSV file with the coordinates of points, and we used matplotlib to plot a map of those points. However, we also learned in the previous video that in addition to point data, spatial data can be made up of lines or polygons. Each object then consists of multiple points, and as such, we will not be able to easily represent this in a CSV file or in a DataFrame with two columns for the x and y coordinates. Therefore, in the rest of the course, we will use specific file formats for geospatial data, such as GeoJSON files, GeoPackage files, or shapefiles, which are specialized in storing spatial data, in addition to traditional tabular data. And to read such files and to work with such geospatial data in Python, we are going to use the GeoPandas library. GeoPandas is a library for working with tabular, geospatial vector data, extending the pandas DataFrame. But let’s start with importing some data. For this, we can use the GeoPandas "read_file" function, to which we pass the path to the file. This function can read most of the occurring spatial vector formats. In this example, we are reading a GeoJSON file with all the countries of the world. Using the head method to show the first 5 rows, you can see that we now have one column with the geometries, in this case polygons representing the countries. And the other columns are attributes describing those countries. Let’s quickly visualize the data so we can see that we indeed have all the countries of the world. For this, we can use the "plot" method, which will make a basic visualisation of the geometries of the countries dataset. But what is this countries object?