Free Online GIS-Ready Satellite Imagery - products L tc

By: Resmap  09-12-2011
Keywords: Mosaic Tiles, imagery

Developed by Earthstar Geographics LLC, TerraColorĀ® is a simulated true colour digital earth imagery product built from data captured by Landsat 7 ETM+, providing a virtually seamless coverage of most of the world's land areas (excluding Antarctica) at 15-meter spatial resolution. TerraColor can be used for a wide variety of applications, including land use analysis, vegetation mapping, military/defense logistics, flight simulation, accurate cartographic mapping and many others. The imagery provides colourful, detailed and visually pleasing views of the earth, and is suitable for mapping at scales of 1:60,000 and higher.

These mosaics are the most accurate, commercially available base maps of the world created, from Landsat imagery. The tiles and mosaics have a better positional accuracy (50m RMS) than the vast majority of the world's 1:100,000 maps.

Resolution: 14.25 metres
Vintage: Ranging from 1999 - 2002
Dimensions: user-defined
Horizontal Accuracy: 50 meters RMS -- 20 metres RMS over Canada & US
Projection: UTM, Geographic (Lat/Long) or user defined
Formats: ECW or JPEG2000
Datum: WGS84
Band Combinations: 7,4,2 transformed to simulated natural colour
Availability: The entire globe
Media: FTP, CD, DVD or 4mm tape or USB 2.0 external hard drive

UTM Projection

The Universal Transverse Mercator (UTM) mosaic tiles generally extend north-south over 5 degrees of latitude, and span east-west for the full width of the UTM zone. The pixel resolution (GSD) is 14.25 meters. For mosaic tiles between 60 degrees north and 60 degrees south latitude, the width of the tile is the standard UTM zone width of 6 degrees of longitude. For mosaic tiles above 60 degrees of latitude, the UTM zone is widened to 12 degrees, centered on the standard UTM meridian. To ensure overlap between adjacent UTM zones, each mosaic extends for at least 50 kilometres (31 miles) to the east and west, and 1 kilometre (0.62 miles) to the north and south.

Geographic Projection (Lat./Long.)

The Geographic mosaic tiles are cast in a generic Latitude Longitude projection with units of decimal degrees. The pixel resolution (GSD) is 0.5 arc-seconds (0.0001388 decimal degrees). Each mosaic tile extends approximately 5 degrees north-south and 6 degrees east-west. (A small amount of overlap between tiles was added so they are slightly larger than 5 x 6 degrees.)

Note: Adjacent east-west image pairs are only guaranteed to be seamless in the Geographic projection. Minor seams may be visible in a few areas when UTM tiles from adjacent zones are laid side by side.

The Licensee accepts TerraColor copyright of the Data and agrees to place copyright notice "copyright TerraColor" on the Data when distributed. Use of the Data by anyone other than the Licensee shall constitute infringement of these rights. Upon payment for the use of Data the Licensee is granted a limited, perpetual, non-exclusive license to use this copy of the Data. This License certifies the Licensee to:

  • Make the internal copies of the Data in support of the Licensee's use of the Data on a number of workstations but not to network or distribute the Data. Use in internal Intranet websites or external Internet websites is not permitted under this license.
  • Use the Data solely for internal purposes of the Licensee, Contractors or consultants working for the Licensee may have access to the Data for purposes related to the Licensee's internal use of the Data.
  • Make unlimited hardcopy prints of the data for internal use.
  • Make unlimited digital subsets for internal use on un-licensed workstations or for non-commercial publication and presentation.
  • Make internal copies of the Data in support of the Licensee's use of the Data on workstations and internal networks. Use in internal Intranet websites is permitted, but use in external Internet websites is not permitted under this license.
  • Use the Data solely for internal purposes of the Licensee. Contractors or consultants working for the Licensee may have access to the Data for purposes related to the Licensee's internal use of the Data
  • Make unlimited hardcopy prints of the data for internal use.
  • Make unlimited digital subsets for internal use or non-commercial publication and presentation.
  • Make unlimited copies of the Data in support of the Licensee's use of the Data on workstations and internal networks; The Integrator/unlimited license will be determined by payment of required Integrator/unlimited license fees.
  • Use of the data in external Internet websites is permitted under this license as long as the imagery files cannot be directly downloaded by Internet users.
  • When used in the supplied format or reformatted into Integrator's image format, make unlimited copies for external distribution to clients of Integrator's systems. Integrator must prevent the imagery files from being directly extracted from by their clients for use in other systems.
  • Make unlimited hardcopy prints of the data for commercial or non-commercial use as long as the words "copyright TerraColor" are clearly shown on the print to indicate copyright of the imagery data.
  • Make unlimited digital subsets for internal use or non-commercial publication and presentation.

Keywords: imagery, Mosaic Tiles

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