## Overview

This guide provides general guidelines for writing your own Google Earth Engine
tutorials. It aims to make it easy to create high-quality tutorials that are
clear, concise, and easily understood by the entire Earth Engine community.

The [tutorial templates](https://developers.google.com/earth-engine/tutorials/community/styleguide#tutorial_templates) below double as
an additional guide to help kickstart your own tutorials. Details on how to use
the templates to get started can be found in [Writing a Tutorial](https://developers.google.com/earth-engine/tutorials/community/write).

In addition, the [Google Cloud Community Tutorial Style Guide](https://cloud.google.com/community/tutorials/styleguide) provides a
valuable reference for writing end-to-end tutorials for a broad audience, while
the [Google JavaScript Style Guide](https://google.github.io/styleguide/jsguide.html) details the recommended
style for use in JavaScript code samples. Reviewers may refer to these guides
when reviewing your submission.

## General guidelines

- Be brief.
- Don't repeat yourself.
  - Don't say the same thing twice (even if worded differently).
- Periodically mark progress.
  - Include images and text at key points in the tutorial so the user knows they're on track. Use sparingly!
- Use the active voice whenever possible.
  - "When the user changes the value", not "when the value is changed".
  - Exception: It's okay to use passive voice when you'd have to go out of your way to use active voice, or if the actor is obvious or not relevant ("an animated GIF is returned" instead of "Earth Engine returns an animated GIF").
- Stick to the facts.
  - Avoid superlatives ("this is ***100%*** the ***best*** and ***fastest*** method").
  - Avoid promoting products or services.
  - Avoid controversial topics.
  - Include citations and URLs when referencing specific methods, datasets, and analyses.
- Make your tutorial self-contained.
  - Try not to rely on special libraries outside the API or datasets not in the public [Earth Engine Data Catalog](https://developers.google.com/earth-engine/datasets/).
  - If you're providing additional data or algorithms, only share them if you have permission to do so. Include all required licenses and attributions.
- Test your code.
  - Be sure to run and test all included code samples right before submitting your article for review.

## Tutorial file headers

If you're creating and submitting community tutorials manually without using the
templates provided in [Writing a Tutorial](https://developers.google.com/earth-engine/tutorials/community/write), you'll need to manually add
the appropriate metadata and license header to the start of the file. Select the
desired format to view a template which can be copied into your own tutorial:

### Markdown

Add the following to the beginning of the document. No whitespace or other
characters should precede the header:

    ---
    title: Your tutorial title
    description: A short description of the tutorial, all on one line with no carriage returns.
    author: your-github-username
    tags: comma-separated, lowercase, list, of, related, keywords
    date_published: YYYY-MM-DD
    ---
    <!--
    Copyright 2023 The Google Earth Engine Community Authors

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        https://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
    -->

Be sure to replace the appropriate template fields before submitting your
tutorial for review.

### Colab

Add the following to a code cell at the beginning of the notebook:

    #@title Copyright 2023 The Earth Engine Community Authors { display-mode: "form" }
    #
    # Licensed under the Apache License, Version 2.0 (the "License");
    # you may not use this file except in compliance with the License.
    # You may obtain a copy of the License at
    #
    # https://www.apache.org/licenses/LICENSE-2.0
    #
    # Unless required by applicable law or agreed to in writing, software
    # distributed under the License is distributed on an "AS IS" BASIS,
    # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    # See the License for the specific language governing permissions and
    # limitations under the License.

## Tutorial templates

### Markdown

If you're familiar with git and GitHub, you may use the code below as a
template to get you started:

    ---
    title: Your tutorial title
    description: A short description of the tutorial, all on one line with no carriage returns.
    author: your-github-username
    tags: comma-separated, lowercase, list, of, related, keywords
    date_published: YYYY-MM-DD
    ---
    <!--
    Copyright 2023 The Google Earth Engine Community Authors

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        https://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
    -->

    In a few sentences, describe what the user is going to learn. Be sure to include
    _concise_ background information; only include what's helpful and relevant.
    When in doubt, leave it out!

    ## Section heading 1

    Break up your tutorial into manageable sections.

    With one or more paragraphs, separated by a blank line.

    Inside your sections, you can also:

    1. Use numbered lists
    1. ..when the order..
    1. ..of items is important.

    And:

    - This is a bulleted list.
    - Use bulleted lists when items are not strictly ordered.

    ..and even:

    Use     | tables   | to organize | content
    --- | --- | --- | ---
    Your    | tables   | can         | also
    contain | multiple | rows        | ...

    ## Section heading 2

    Use separate sections for related, but discrete, groups of steps.

    Use code blocks to show users how to do something after describing it:

    ```js
    // Use comments to describe details that can't be easily expressed in code.
    // Always try making code more self descriptive before adding a comment.
    // Similarly, avoid repeating verbatim what's already said in code
    // (e.g., "assign ImageCollection to variable 'coll'").
    var coll = ee.ImageCollection('LANDSAT/LC08/C02/T1_TOA');
    ```

    ### Use subsections if appropriate

    Consider breaking longer sections that cover multiple topics or span multiple
    pages into subsections.

Alternatively, the above template can be opened directly in GitHub's
web based file editor by following instructions at [Writing
a Tutorial](https://developers.google.com/earth-engine/tutorials/community/write).

Be sure to refer to [Writing a Tutorial](https://developers.google.com/earth-engine/tutorials/community/write) for important details on
how to propose, author, and submit tutorials.

### Colab

To create a new Colab notebook using the recommended style template, click
here:

[New Colab tutorial](https://colab.research.google.com/github/google/earthengine-community/blob/master/tutorials/tutorial-template.ipynb)

This will open a notebook containing instructions for authoring and
submitting your tutorial. Be sure to refer to [Writing a Tutorial](https://developers.google.com/earth-engine/tutorials/community/write)
for important details on the proposal, authoring, and submission process.