TerraColor® Frequently Asked Questions (FAQ)

1. How do I determine which image tiles I need?
2. Is TerraColor "pan sharpened"?
3. What are "derivative" versions of TerraColor?
4. Is TerraColor used in Esri's web mapping applications?
5. Is TerraColor used in Nokia HERE's web mapping applications?
6. Is TerraColor used in Microsoft's web mapping applications?
7. Is TerraColor used in DigitalGlobe's web mapping applications?
8. Is TerraColor used in Apple Maps mapping applications?
9. Is TerraColor used in Yahoo Maps mapping applications?
10. Is TerraColor used in Yandex's web mapping applications?
11. Is Harris Corp's Globe15 product based on TerraColor?

1. Click on this link to download the image coverage Shapefile showing the boundaries and filename of each TerraColor image tile to determine the number and filenames of tiles you need to cover a specific area of the earth. The shapefile is in the Geographic (Lat Long) projection and WGS84 datum.

2. Is TerraColor Pan-sharpened?
Yes it is. Pan sharpening is a process that fuses or merges the higher resolution (15-meter) panchromatic band of Landsat 7 and Landsat 8 with the lower resolution (30-meter) color/multispectral bands to create color imagery at 15-meter resolution. The same process is used where ALI data is used, but ALI's Pan band has been resampled from 10 to 15 meters.

3. What are "derivative" versions of TerraColor?
Some companies start with one of the standard versions of TerraColor and modify it in some ways to derive a version that has their own "look and feel." These derivative versions are typically created by web mapping companies (Apple and Nokia are examples) to create a unique look for their large scale imagery base maps. The changes are usually basic changes to the colorization or brightness of the imagery (although other types of changes are sometimes made).

4. Is TerraColor used in Esri's web mapping applications?
Yes, the TerraColor version with bathymetric shaded relief ocean fill is used as the global satellite image base layer in Esri's ArcGIS Online. At larger scales Esri's TerraColor version has a custom bathymetric shaded relief image in the ocean areas, and they transition to the plain ocean fill version at smaller scales. The imagery is displayed whenever you see "Earthstar Geographics" displayed in the lower-right corner of the mapping window when you select "Imagery" as the Basemap. The version on ArcGIS Online contains the latest product upgrades (to Q1 2014).

5. Is TerraColor used in Nokia HERE's web mapping applications?
Yes, a derivative version of TerraColor with bathymetric shaded relief ocean fill is used by Nokia HERE as the base global satellite imagery layer in their applications (here.com). The modifications are primarily lightening the imagery colors. The version on Nokia HERE does not contain the latest product upgrades (to Q2 2012).

6. Is TerraColor used in Microsoft's web mapping applications?
Yes, the TerraColor version with bathymetric shaded relief ocean fill is used as the global satellite image base layer in Microsoft's Bing Maps. The imagery is displayed whenever you see "Earthstar Geographics LLC" displayed in the lower-right corner of the mapping window. The version on Bing Maps does not contain the latest product upgrades (to Q1 2012).

7. Is TerraColor used in DigitalGlobe's web mapping applications?
Yes, the TerraColor version with bathymetric shaded relief ocean fill is currently used as the base global satellite imagery layer in DigitalGlobe's Global Basemap web mapping service. The version on Global Basemap does not contain the latest product upgrades (to Q2 2012).

8. Is TerraColor used in Apple Maps web mapping applications?
Yes, a derivative version of TerraColor with bathymetric shaded relief ocean fill is currently used as the base global satellite imagery layer in Apple Maps. The changes include color modifications and adding relief shading to the land areas. The version on Apple Maps does not contain the latest product upgrades (to Q2 2012).

9. Is TerraColor used in Yahoo Maps web mapping applications?
Yes, the derivative version of TerraColor used by Nokia HERE is currently used as the base global satellite imagery layer in Yahoo Maps. The version on Yahoo Maps does not contain the latest product upgrades (to Q2 2012).

10. Is TerraColor used in Yandex's web mapping applications?
Yes, an older version of TerraColor without ocean masking is currently used as the medium resolution satellite imagery layer in Yandex's web mapping service. The imagery is displayed whenever you see "Earthstar Geographics LLC" displayed in the lower-right corner of the mapping window. (Yandex is sometimes referred to as the "Russian Google". The English language version of the maps can be accessed at maps.yandex.com). This is an older version of TerraColor without ocean masking.

11. Is Harris Corp's Globe15 product based on TerraColor?
Yes, Harris Corporation licensed an earlier version of the TerraColor product from us, and created a derivative version tailored to their visual simulation market. They sell this product commercially under the brand name Globe15.

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