In this tutorial you will learn how to open a .tiff file in Jupyter Notebook and learn about kernels.
The goal of the activity is simply to ensure that you have basic
familiarity with Jupyter Notebooks and that the environment, especially the
gdal package is correctly set up before you pursue more programming tutorials. If you already
are familiar with Jupyter Notebooks using Python, you may be able to complete the
assignment without working through the instructions.
This will be accomplished by: *Create a new Jupyter kernel *Download a GEOTIFF file *Import file onto Jupyter Notebooks *Check the raster size
Assignment: Open a Tiff File in Jupyter Notebook
Set up Environment
First, we will set up the environment as you would need for each of the live coding sections of the Data Institute. The following directions are copied over from the Data Institute Set up Materials.
In your terminal application, navigate to the directory (
cd) that where you
want the Jupyter Notebooks to be saved (or where they already exist).
We need to create a new Jupyter kernel for the Python 3.8 conda environment (py38) that Jupyter Notebooks will use.
In your Command Prompt/Terminal, type:
python -m ipykernel install --user --name py34 --display-name "Python 3.8 NEON-RSDI"
In your Command Prompt/Terminal, navigate to the directory (
cd) that you
created last week in the GitHub materials. This is where the Jupyter Notebook
will be saved and the easiest way to access existing notebooks.
Open Jupyter Notebook
Open Jupyter Notebook by typing into a command terminal:
Once the notebook is open, check which version of Python you are in.
# Check what version of Python. Should be 3.8. import sys sys.version
To ensure that the correct kernel will operate, navigate to Kernel in the menu, select Kernel/Restart Kernel And Clear All Outputs.
You should now be able to work in the notebook.
Download the digital terrain model (GEOTIFF file)
Download the NEON GeoTiFF file of a digital terrain model (dtm) of the San Joaquin Experimental Range. Click this link to download dtm data: https://ndownloader.figshare.com/articles/2009586/versions/10. This will download a zippped full of data originally from a NEON data carpentry tutorial (https://datacarpentry.org/geospatial-workshop/data/).
Once downloaded, navigate through the folder to C:NEON-DS-Airborne-Remote-Sensing.zip\NEON-DS-Airborne-Remote-Sensing\SJER\DTM and save this file onto your own personal working directory. .
Open GEOTIFF file in Jupyter Notebooks using gdal
gdal package that occasionally has problems with some versions of Python.
Therefore test out loading it using:
If you have trouble, ensure that 'gdal' is installed on your current environment.
Establish your directory
Place the downloaded dtm file in a repository of your choice (or your current working directory). Navigate to that directory. wd= '/your-file-path-here' #Input the directory to where you saved the .tif file
Import the TIFF
Import the NEON GeoTiFF file of the digital terrain model (DTM)
from San Joaquin Experimental Range. Open the file using the
gdal.Open command.Determine the size of the raster and (optional) plot the raster.
Use GDAL to open GEOTIFF file stored in your directory
SJER_DTM = gdal.Open(wd + 'SJER_dtmCrop.tif')>
Determine the raster size.
Add in both code chunks and text (markdown) chunks to fully explain what is done. If you would like to also plot the file, feel free to do so.
Push .ipynb to GitHub.
When finished, save as a .ipynb file.
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