No module named 'gdal'

To whom it may concern,

Recently I'm following the tutorial of [Extracting buildings and roads from AWS Open Data using Amazon SageMaker](https://aws.amazon.com/blogs/machine-learning/extracting-buildings-and-roads-from-aws-open-data-using-amazon-sagemaker/)

When setup all environments and run the notebook I found:
` import libs.solaris as sol ` is not working.
bu all dependencies have already satisfied

```
---------------------------------------------------------------------------
ModuleNotFoundError Traceback (most recent call last)
in
----> 1 import libs.solaris as sol

~/SageMaker/aws-open-data-satellite-lidar-tutorial/libs/solaris/__init__.py in
----> 1 from . import bin, data, eval, nets, raster, tile, utils, vector
2
3 __version__ = "0.2.2"

~/SageMaker/aws-open-data-satellite-lidar-tutorial/libs/solaris/data/__init__.py in
2 import pandas as pd
3 import geopandas as gpd
----> 4 import gdal
5 import rasterio
6

ModuleNotFoundError: No module named 'gdal'
```