Essay On Landsat-4. 1 - 838 Words

4.2 Methods 4.2.1 Data Description Remote Sensing and ancillary data on the study area will be collected from different governmental agencies and organizations. A Landsat 8 image (spatial resolution of 30 m) of the study area will be acquired on January to March. The Landsat-8 (official name: LDCM - Landsat Data Continuity Mission) is the last of the historic Landsat series designed by NASA, one of the first missions of Earth observation and by far the most long-lived with decades of experience from the first satellite in 1972. Launched in February 2013, just a month later the satellite became operational providing shots with a time of 16 days. The improved image quality, compared to the previous Landsat-7, the introduction of new spectral†¦show more content†¦Therefore, it provides data on the reflectance of the land surface for many different wavelengths, as Landsat-8, but for some of them the resolution is much better, until 10 meters versus the 30 meters of Landsat-8 (Pia and et al, 2016). The digital elevation model (DEM, 10 m Ãâ€" 10 m) will be used in this study which will be generated from radar image of sentinel 1 with 10 m resolution. Climatological data (average rainfall data) will be collected from the Ethiopia Meteorological Agency. An exploratory soil map of study area will be obtained from the Ministry of Agriculture of Ethiopia or FAO, socio economic data will be acquired from CSA and other data will be acquired from respective bodies. 4.2.2 Preparation of Thematic layers Eight thematic layers will be produced and analyzed for this study which includes rainfall, soil, Geology, Geomorphology, Landuse/Landcover,Lineament, Drainage density and Slope.Inverse Distance Weighting (IDW) algorithm will be used to estimate the amount of annual rainfall in the study area.Intensity and duration of rainfall play a significant role in infiltration. High intensity and short duration rain possesses less infiltration and more surface runoff. Low intensity and long duration rain possesses high infiltration than the runoff. High weight is given to the high rainfall area and least weight is given to low rainfall area (K. Ibrahim and S.A. Ahmed).The slopeShow MoreRelatedThe Development History Of Gis Essay2133 Words   |  9 PagesEssay on the development history of GIS Introduction This essay is about the development history of GIS (Geographical Information System). In the next paragraph the work of Charles Piquet in 1832 and John Snow in 1854 is mentioned. Furthermore the paragraph traces the development history between 1960 and 2014. It lists the development history from the Canadian GIS through the development of GPS until the launch of French satellite SPOT 7.The following paragraph defines the four major development