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DigitalGlobe Imagery FAQ

DigitalGlobe Imagery Frequently Asked Questions

1. What products are available from DigitalGlobe?

The products available from DigitalGlobe include:

Product

Specific Product

Satellite Imagery

Standard Imagery – they have been georeferenced. You can either choose panchromatic and multispectral data or request pan-sharpened imagery;

Stereo imagery – These are high resolution stereo imagery useful for creating Digital Elevation Models (DEMs), 3D visualizations, and feature extraction applications

Basemap

Global Basemaps– The best imagery from the DigitalGlobe Image Library, accessible online;

Basemap +Vivid– The most beautiful, high-resolution, imagery basemap available
anywhere. These have minimum cloud cover and color balancing has been done for the images.

Basemap +Metro– provides easy access to up-to-date high-resolution imagery of more than 2,600 world capitals and major metropolitan areas;

Basemap +Daily – It is a premier subscription service that provides near real-time access to imagery over areas of strategic and economic interest

Elevation Products

Advanced Elevation Series – provides the Digital Surface Models or Digital Terrain Models you need without the challenges of local access, with options ranging from 2m to 8m in accuracy and resolution.

Cloud Services

FirstLook -Gain fast, web-based access to priority imagery for natural disasters, political instability and human interest events around the globe via online subscription. For emergency service providers.

ImageConnect A powerful ArcMap desktop extension. Access our high-resolution georeferenced imagery directly from your ArcGIS desktop via simple add-on.

Maps API– Satellite imagery for web and mobile apps. Integrate our most detail-rich basemaps with your applications using a simple API.


2. What is the resolution of DigitalGlobe imagery products?

DigitalGlobe provides high resolution satellite imagery ranging from 0.3 m spatial resolution to 0.5m spatial resolution. WorldView3 and WorldView4 satellites have a spatial resolution of 0.3m while WorldView1, WorldView2 and GeoEye1 have a spatial resolution of 0.5m.

3. What is Atmospheric Compensation (A-Comp) and how can I get it?

Atmospheric compensation is a competitive differentiator that makes DG’s imagery to be of higher quality than the competition since it reduces haze in images and the effects of aerosols in an image. Less haze leads to higher aesthetics and a more accurate spectral response leads to more accurate feature/change detection. It is currently available for all images and will soon be available for Basemaps.

4. What is Advanced Elevation Series?

Provides High accuracy Digital Surface Models and Digital Terrain Models. It comes with numerous product configuration options for accuracy, resolution, type, and format. These product levels are Mapping – DSM or DTM, Precision – DSM or DTM, Very High Precision – DSM or DTM. Spatial resolution for Mapping is 8m, Precision 4m and Very High Precision 2m.

For the very high precision DEM having a 2m ground sampling distance, Ground Control Points (GCPs) have to be collected to enable production of this product.

5. How do you collect the GCP’s?

DigitalGlobe will provide the feasibility report for generating the DEM. After that Oakar Services can go to the field to collect the GCP’s over the area. This comes at a separate cost from generating the Digital Elevation Model.

6. Do you have to pay for stereo images separately from the price of the DEM?

No. You just pay for the DEM on its own. In case you want a separate image to drape over the image, that is when you pay for the standard imagery separately.

7. In what formats are DigitalGlobe imagery products delivered?

GeoTIFF1.0, NITF1.0, and NITF2.0 are image formats for Basic, Stereo, Standard and Orthorectified products. The images can be either, Archive, Fresh Archive or New.

Archive imagery is imagery that was taken more than 90 days from the day of order i.e more than 3 months old. Fresh archive imagery on the other hand is imagery that was taken less than 90 days from the day of order i.e less than 3 months old. New imagery is imagery that is yet to be taken by tasking the satellite to pass over an area and take the image.

8. In what projection and datum are imagery products delivered?

We offer all common projections including Universal Transverse Mercator (default) and Geographic. Datum include WGS84.

9. What are the minimum order sizes?

  • The minimum order for new collections is 100 square kilometers.
  • The minimum order for Archive imagery is 25 square kilometers.
  • The minimum order for ortho-rectified and stereo imagery is 100 square kilometers.
  • The minimum order area for archive imagery, for all sensors, is 25 sq. km with a 2km (DigitalGlobe) or 3km (GeoEye) minimum order width.
  • The minimum order area for new tasking collections, for all sensors, is 100 sq. km with a 5km minimum order width.

10. Is Basemap seamless?

Basemap +Metro and Basemap +Vivid are produced to minimize difference between images. All other options in the Basemap suite focus on the individual image, not the complementary nature between images.


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