ZULU 7 Landsat 7 false colour mosaics

The African set of Landsat 7 false colour mosaics on DVD

Landsat 7 with its 15m/pixel panchromatic sensor has redefined mapping of remote areas and given a new dimension to the term high definition satellite imagery.
In a bold move NASA has now released to the general public these fantastic images which until recently were only accessible by national government and multinational corporations. African GIS has now taken a new meaning: finally it has become possible to map inaccessible regions of the continent up to a scale of 1:50.000 using just a personal computer and a limited budget.

Cape Town harbour. Resolution 14,3m/pixel

MadMappers brings you the complete African collection of Orthorectified Landsat Thematic Mapper Mosaics better known as Zulu 7, over 30Gb of highly compressed satellite images in false colour.
The mosaicked Landsat 7 images, dated from 1999 to 2002, were produced, under NASA contract, by Earth Satellite Corporation. Processing was done in the infrared spectrum by pan-sharpening 3 colour bands chosen for maximum contrast:

• Band 7 (mid-infrared light) displayed as Red,
• Band 4 (near-infrared light) displayed as Green and
• Band 2 (visible green light) displayed as Blue

Since of the infrared processing the colours are not real, for instance vegetation is represented by shades of purple (not pleasing to the eye but you can distinguish types of vegetation, for example sugarcane fields are light pink). Another example is water: cold water is black and warm water is light blue (useful if you have to pick the warmest spot of the beach for a swim).

Zulu 7 images differ from Zulu 5 in age (year 2000 vs. year 1990), in resolution (14,3m/pixel, which is roughly equivalent to scale 1:56 000, vs. 28,5m/pixel scale 1:115 000) and in size: they are very large, of the order of 250Mb per tile. Because of their wavelet compressed format (MrSid) a system with a minimum of 128Mb RAM is recommended.

The name Zulu: it is the name of the NASA server which hosts these images (https://zulu.ssc.nasa.gov), it is African and we like it. Because of their size they are not for download  by the faint hearted (even if by ADSL and particularly if limited by a traffic cap). Much easier, quicker and cheaper to get the MadMappers DVD set which includes Oziexplorer calibration files and is ready to be loaded directly from the DVD rom drive!
 

• Coverage:
Show coverage map
Complete country coverage: Equatorial Guinea,
Partial country coverage: Benin, Burkina Faso, Cameroon, C.A.R., Chad, Congo, DRC, Ethiopia, Gabon, Ghana, Ivory Coast, Kenya, Nigeria, Somalia, Sudan, Togo, Uganda

• Format: MrSid
a free viewer is available from Lizardtech

• Calibration:
Oziexplorer and world file included

• GIS software compatibility:
Oziexplorer and Global Mapper compatible

check screen shot

MADMAPPERS PRICE:
R 150,00 / US$ 25,00
plus postage

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ZULU 7 DVD #4: West Africa

• Coverage:
Show coverage map
Complete country coverage: Capo Verde, Senegal, Gambia, Guinea, Guinea Bissau, Sierra Leone, Liberia, Ivory Coast, Benin, Togo, Ghana, Burkina Faso
Partial country coverage: Mauritania, Mali, Niger, Chad, Nigeria

• Format: MrSid
a free viewer is available from Lizardtech

• Calibration:
Oziexplorer and world file included

• GIS software compatibility:
Oziexplorer and Global Mapper compatible

check screen shot

MADMAPPERS PRICE:
R 150,00 / US$ 25,00
plus postage

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ZULU 7 DVD #5: The Nile

• Coverage:
Show coverage map
Complete country coverage: Egypt, Eritrea, Djibouti,
Partial country coverage: Sudan, Ethiopia, Somalia, Chad, Central African Republic

• Format: MrSid
a free viewer is available from Lizardtech

• Calibration:
Oziexplorer and world file included

• GIS software compatibility:
Oziexplorer and Global Mapper compatible

check screen shot

MADMAPPERS PRICE:
R 150,00 / US$ 25,00
plus postage

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ZULU 7 DVD #6: The Sahara

• Coverage:
Show coverage map
Complete country coverage: Morocco, Tunisia, Western Sahara,
Partial country coverage: Algeria, Mauritania, Mali, Niger, Chad, Lybia

• Format: MrSid
a free viewer is available from Lizardtech

• Calibration:
Oziexplorer and world file included

• GIS software compatibility:
Oziexplorer and Global Mapper compatible

check screen shot

MADMAPPERS PRICE:
R 150,00 / US$ 25,00
plus postage

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The ZULU 7 Africa collection - 6 DVDs

 

 

• Coverage:
the African continent in a 6 DVDs set
(DVD #1 to DVD # 6)

 

• Format MrSid
a free viewer is available from Lizardtech

 

 

• Calibration:
Oziexplorer and world file included

 

 

• GIS software compatibility:
Oziexplorer and Global Mapper compatible

 

 

 

MADMAPPERS PRICE:
R 900,00 / US$ 150,00
FREE  postage WORLDWIDE !!!

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