The examples on this page demonstrate uses of TensorFlow with Earth Engine. See the hosted models page for details. These examples use the Earth Engine Python API and TensorFlow running in Colab Notebooks.
Multi-class prediction with a DNN from scratch
A "deep" neural network (DNN) is an artificial neural network (ANN) with one or more hidden layers. This example demonstrates a simple DNN with a single hidden layer. The DNN takes spectral vectors as inputs (i.e. one pixel at a time) and outputs a single class label and class probabilities per pixel. The Colab notebook demonstrates creating the DNN, training it with data from Earth Engine, making predictions on exported imagery and importing the predictions to Earth Engine.
Multi-class prediction with a DNN hosted on Vertex AI
You can get predictions from a model hosted on Vertex AI directly in Earth Engine (e.g. in the Code Editor. This guide demonstrates how to train, save and prepare a TensorFlow model for hosting, deploy the model to a Vertex AI endpoint and get and get a map of interactive model predictions from Earth Engine.
Semantic segmentation with an FCNN trained and hosted on Vertex AI
This guide demonstrates semantic segmentation for land cover mapping. Details on the inputs or training data are in this 2022 Geo for Good session. Powered by data from Earth Engine, this guide shows how to train a model on Vertex AI using a custom machine, prepare the model for hosting, deploy the model to an endpoint and get and get a map of interactive model predictions from Earth Engine.
Hosting a Pre-trained Tree-crown Segmentation Model
You can host pretrained models to get interactive predictions in Earth Engine. For example, Li et al. (2023) published several tree-crown segmentation models implemented in TensorFlow. If the inputs and outputs are shaped accordingly, these models can be hosted directly and used to get predictions in Earth Engine wherever there's input imagery. This guide demonstrates how to download a pre-trained model, prepare it for hosting on Vertex AI, and get predictions on imagery in the Earth Engine public catalog.
TensorFlow Decision Forests in Earth Engine
TensorFlow Decision Forests (TF-DF) is an implementation of popular tree-based machine learning models in TensorFlow. These models can be trained, saved and hosted on Vertex AI, as with TensorFlow neural networks. This notebook demonstrates how to install TF-DF, train a random forest, host the model on Vertex AI and get interactive predictions in Earth Engine.
Regression with an FCNN
A "convolutional" neural network (CNN) contains one or more convolutional layers, in which inputs are neighborhoods of pixels, resulting in a network that is not fully-connected, but is suited to identifying spatial patterns. A fully convolutional neural network (FCNN) does not contain a fully-connected layer as output. This means that it does not learn a global output (i.e. a single output per image), but rather localized outputs (i.e. per-pixel).
This Colab notebook demonstrates the use of the UNET model, an FCNN developed for medical image segmentation, for predicting a continuous [0,1] output in each pixel from 256x256 neighborhoods of pixels. Specifically, this example shows how to export patches of data to train the network and how to overtile image patches for inference, to eliminate tile boundary artifacts.
Training on AI Platform
For relatively large models (like the FCNN example), the longevity of the free virtual
machine on which Colab notebooks run may not be sufficient for a long-running training
job. Specifically, if the expected prediction error is not minimized on the evaluation
dataset, then more training iterations may be prudent. For performing large training
jobs in the Cloud, this Colab notebook demonstrates how to
package your training
code, start a
training job, prepare a
earthengine model prepare command, and get predictions in Earth
Engine interactively with