Functions Of Landsat Data
Landsat eight adalah sebuah satelit observasi bumi Amerika yang diluncurkan pada tanggal 11 Februari 2013. Ini adalah satelit kedelapan dalam program Landsat; ketujuh untuk berhasil mencapai orbit. Awalnya disebut Landsat information Continuity Mission (LDCM), itu adalah sebuah kolaborasi antara NASA dan Geological Survey Amerika Serikat (USGS). NASA Goddard House Flight Center yang menyediakan pengembangan, rekayasa sistem misi, dan akuisisi kendaraan peluncuran sementara USGS disediakan untuk pengembangan sistem darat dan akan melakukan operasi misi terus-menerus.
Landsat-7 information are collected from a nominal altitude of 705 kilometers in 183- kilometer swaths, providing international protection. Pada komposit band 3,2,1 tutupan vegetasi ditunjukan dengan warna hijau atau bisa dikatakan sesuai dengan warna yang tampak jika dilihat dengan mata sedangkan pada komposit band 4,5,3 tutupan vegetasi dtandai dengan warna jingga. You’ll be able to obtain the final coaching shapefile and spectral signature record , where I collected eleven spectral signatures.
Any of assorted satellites used … Read the rest
This combination of near-IR (Band four), mid-IR (Band 5) and purple (Band 3) provides added definition of land-water boundaries and highlights subtle particulars not readily apparent within the seen bands alone. Inland lakes and streams can be positioned with higher precision when more infrared bands are used. With this band combination, vegetation sort and condition present as variations of hues (browns, greens and oranges), in addition to in tone. The 4,5,3 mixture demonstrates moisture variations and is useful for evaluation of soil and vegetation situations. Generally, the wetter the soil, the darker it seems, due to the infrared absorption capabilities of water.
The program was referred to as the Earth Resources Technology Satellites Program when it was initiated in 1966, however the name was modified to Landsat in 1975. In 1979, Presidential Directive 54 underneath President of the United States Jimmy Carter transferred Landsat operations from NASA to NOAA , advisable growth of long run operational system with 4 additional satellites past Landsat 3, and beneficial transition to personal sector operation of Landsat. This occurred in 1985 when the Earth Observation Satellite Company (EOSAT), a partnership of Hughes Aircraft and RCA , was chosen by NOAA to operate the Landsat system underneath a ten-yr contract. EOSAT operated Landsats four and 5, had exclusive rights to market Landsat knowledge, and was to construct Landsats 6 and 7.
These options, combined with all the traditional utility of Landsat data confirmed over 33 years, makes Landsat 7 data essential for a large and various distant sensing neighborhood.
We are going to classify a subset of Landsat 8 picture acquired over Rome, Italy (data out there from the U.S. Geological Survey) on June 12, 2014. Utilizing a semi-automated approach we are going to quickly classify the image and estimate land cover area, in solely six phases.