Question 2: Finding Two Landsat 7 Images

About Landsat 7 :)

Landsat 7 Satellite:

Landsat 7 is a U.S. satellite used to acquire remotely sensed images of the Earth's land surface and surrounding coastal regions. The Landsat 7 satellite was launched in 1999 and was designed to last five years. It continues to function at diminished capacity. The Landsat Data Continuity Mission, scheduled to be launched in 2011, will be the next satellite in the Landsat series. The goal of the Landsat satellite program is to improve our understanding of the Earth as an integrated system, including how it responds to natural and human-induced disturbances. (Heat Island Effect, 2009)

 

How to get Landsat 7 images

In order to give more detailed information about finding map data. I picked two interested images from GeoGratis(http://geogratis.cgdi.gc.ca/geogratis/en/index.html). 

 In the "Landsat 7 Level 1-G Imagery over Canada" there are about 1150 index covering all over the area of Canada. In order to get to know about the Landsat 7 image that the site provides, I downloaded both two image files and metadata of those two images (data about data).  

Import two maps to PCI Geomatics

  

It was possible to open TIFF. compressed file with PCI  Geometis, however, with this compressed file, it is not able to have all bands (seperate TIFF files of each band). Therefore, we should download all separate band files and make sure that all files are TIFF files. From the two maps of Canada that I downloaded from the GeoGratis site, there were no tiff. file available. So, in order to get the TIFF file, we should get the data as TIFF format from GLCF- esdi website.


http://glcfapp.glcf.umd.edu:8080/esdi/index.jsp

After download the areas of two maps of Canada. In order to extract the GZ. files from the GLCF website, download the Altap Salmander 2.54 from http://www.altap.cz/download.html

Extracting files with Altap Salamander 2.54

How To  MERGE ALL SEPERATED BANDS

Go to "PCI Moderler"

From Module Librarian find "Merge", "Import","Export" icons

Drag one merge icon, 6 import icons, and one export icon. (we have six bands to merge)