This app provides a dynamic browsing experience where previous World Imagery versions are presented within the map, along a timeline, and as a list. Versions that resulted in local changes are dynamically presented to the user based on location and scale. Preview changes by hovering and/or selecting individual layers. When ready, one or more Wayback layers can be added to an export queue and pushed to a new ArcGIS Online web map.

View it live

To begin, clone this repository to your computer:

https://github.com/vannizhang/wayback.git

From the project's root directory, install the required packages (dependencies):

npm install

Now you can start the webpack dev server to test the app on your local machine:

# it will start a server instance and begin listening for connections from localhost on port 8080
npm run start

To build/deploye the app, you can simply run:

# it will place all files needed for deployment into the /build directory 
npm run build

• ArcGIS API for JavaScript (4.7)
• D3.js v4

• Wayback - 81 Flavors of World Imagery
• Wayback Imagery group
• ArcGIS Living Atlas of the World
• Esri

Find a bug or want to request a new feature? Please let us know by submitting an issue.

Esri welcomes contributions from anyone and everyone. Please see our guidelines for contributing.

Copyright 2018 Esri

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

http://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.

A copy of the license is available in the repository's license.txt file.