Earth Engine App with Streamlit

The goal of this demo is to build an Earth Engine App and deploy it using Streamlit. The code uses Python APIs and uses the geemap python library developed by Qiusheng Wu The code can be replicated and executed on your local machine or any other hyperscaler, but I will be showing how to run it on GCP

Objective

The objective is to build a multipage Streamlit app for Google Earth Engine

Building Mapper

The first page of the app uses GEE's Dynaminc World data and merges it with Global building footprint data. The user will choose a state and county in USA for a particular year. The app then analyses Dynamic World data for the chosen year against 2022 and generates an app which displays the new built up area in red. You can then use the split-mpa slider to figure out which building were built since the year you chose. The area where the red from Dynamic world (left split map) overlaps with the pink from Global building footprint are the structures built.

Wildfire Mapper

The second page of the app uses GEE's FIRMS satellite imagery and merges it OSM data in Google BigQuery data. The user will choose a state and county in USA for a particular timeperiod. The app then generates a wildfire imagery for the given area and timeperiod and intersects it with free public building data available in Google's BigQuery

Requirements

A GCP project which has been registered for Earth Engine usage with APIs for artifact registry, cloud build, earth engine and cloud run
Create a repository in Artifact registry, it will be needed to store the Docker images
An IAM service account with all the permissions enabled as shown below:
We will be using EE scopes, but in case you want to use Streamlit you will need to do GEE authentication with a key. The instruction about how to do it is already written in this clear and excellent tutorial by Mykola Kozyr

Setting up the demo

In Cloud Shell or other environment where you have the gcloud SDK installed, execute the following commands:

gcloud components update 
cd $HOME

git clone https://github.com/dojowahi/ee-on-streamlit.git
cd ~/ee-on-streamlit


docker build -t "<REPO_REGION>-docker.pkg.dev/<PROJECT_ID>/<SERVICE_NAME>/<IMAGE_NAME>:<TAG-ID>" -f src/Dockerfile .
docker push "us-central1-docker.pkg.dev/dekart-on-gcp/ee-github-apps/ee-on-streamlit:3.0.0"

gcloud run deploy <SERVICE_NAME> --image us-central1-docker.pkg.dev/dekart-on-gcp/ee-github-apps/ee-on-streamlit:3.0.0 --allow-unauthenticated --region <REGION> --service-account <SERVICE_ACCOUNT>

Once the app is deployed, and you choose the options from the dropdown you should see