Viewing Available Open Data

You can view high-resolution imagery and download assets from any Open Data event.

Overview: Event Data Page

Use the overview image and table to identify each section of an event data page.

Numbered Area	Description
1 Event Details	The date and name of the event.
2 Imagery Options	Select whether you want to view pre-event or post-event imagery. By default, both options are selected.
3 Event Summary	A summary of the Open Data event.
4 Sort By	Sort available imagery by most or least recent.
5 Available Imagery	Available images are shown as large preview tiles. Each preview tile shows the imagery date, the image ID, and the number of available Analysis Ready Data (ARD) tiles for that image. The currently selected image is highlighted.
6 Show/Hide Grid	Display (or hide) a grid on the viewport to identify the location of each available ARD tile.
7 Close Details	Close the image details side of the interface. This hides the viewport and all ARD tiles for the selected image. Select any preview image to reopen the image details side of the interface.
8 Image Displayed in MGP Xpress Viewport	When you select an image, it displays in high resolution in the MGP Xpress viewport.
9 Available Analysis Ready Data (ARD) Tiles	Maxar Open Data uses Analysis Ready Data (ARD) imagery. Each image is divided using tiles. This list of tiles displays below the MGP Xpress viewport.
10 ARD Tile Quad Key(s)	ARD uses quad keys to identify and index regions. Each ARD tile is identified using several quad keys. Select a quad key to see more information about that section of the image.
11 ARD Quad Key Metadata	Metadata details are available for each ARD quad key.
12 Downloadable Assets	You can download several imagery assets for each quad key. Downloads begin immediately.

Numbered Area

Description

Event Details

The date and name of the event.

Imagery Options

Select whether you want to view pre-event or post-event imagery. By default, both options are selected.

Event Summary

A summary of the Open Data event.

Sort By

Sort available imagery by most or least recent.

Available Imagery

Available images are shown as large preview tiles. Each preview tile shows the imagery date, the image ID, and the number of available Analysis Ready Data (ARD) tiles for that image.

The currently selected image is highlighted.

Show/Hide Grid

Display (or hide) a grid on the viewport to identify the location of each available ARD tile.

Close Details

Close the image details side of the interface. This hides the viewport and all ARD tiles for the selected image.

Select any preview image to reopen the image details side of the interface.

Image Displayed in MGP Xpress Viewport

When you select an image, it displays in high resolution in the MGP Xpress viewport.

Available Analysis Ready Data (ARD) Tiles

Maxar Open Data uses Analysis Ready Data (ARD) imagery. Each image is divided using tiles. This list of tiles displays below the MGP Xpress viewport.

ARD Tile Quad Key(s)

ARD uses quad keys to identify and index regions. Each ARD tile is identified using several quad keys. Select a quad key to see more information about that section of the image.

ARD Quad Key Metadata

Metadata details are available for each ARD quad key.

Downloadable Assets

You can download several imagery assets for each quad key. Downloads begin immediately.

Selecting and Viewing Event Imagery

When you open an event, the left side of the interface displays available event imagery.

In the Imagery section, select whether you want to view available pre-event imagery or post-event imagery. Both options are selected by default.
To sort available event imagery, select a sort option from the Sort By drop-down. By default, the most recent imagery is displayed first.
Select an available event image to display its Open Data imagery in the MGP Xpress viewport on the right side of the interface.
Additionally, when you select an image, its associated Analysis Ready Data (ARD) tiles display under the MGP Xpress viewport.
Maxar Open Data is displayed in high resolution. Use your mouse or the zoom buttons to zoom in and view details.

Viewing More Details and Downloading Event Assets

After you select an image, its associated Analysis Ready Data (ARD) tiles display under the MGP Xpress viewport.

Metadata and downloadable assets are available for each ARD tile.

Select any ARD tile to expand it. Additional metadata for that tile displays. Metadata includes the catalog ID, cloud percentage, satellite, and tile area.
Select Show Grid to identify the location of each ARD tile in the viewport.
(Optional) Select one or more imagery assets to download. The download begins automatically.
Downloadable assets include:
- Data Mask More Information
  ARD order deliveries include a set of data masks for each tile. A raster GeoTiff (.tif) and a vector GeoPackage (.gpkg) file are delivered for most masks. There are two exceptions:
  - Clouds and cloud shadows are both captured in a single raster mask called the "cloud/cloud shadow coverage raster." Cloud and cloud shadows have individual vector files, named "cloud polygons" and "cloud shadow polygons."
  - The "data mask" is derived from the raster image and is delivered only as a vectorized GeoPackage.
- Multispectral Image More Information
  An ARD multispectral image is a 4- or 8-band image that has been minimally processed for analytics. The following pre-processing steps are applied:
  - Atmospheric compensation
  - Orthorectification to native resolution, as captured by the sensor
- Panchromatic Image More Information
  An ARD panchromatic image is a single-band, black-and-white image that has been minimally processed for analytics. The following pre-processing steps are applied:
  - Atmospheric compensation
  - Orthorectification to native resolution, as captured by the sensor
- Visual Image More Information
  The visual format converts the source imagery to an 8-bit range suitable for visual display.