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Advanced GIS Exam 1 Study Guide Solutions

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Advanced GIS Exam 1 Study Guide Solutions John Snow - ANSWER-English Physician, used GIS to locate Cholera outbreaks by contaminated wells -GIS on paper maps Ian McHarg - ANSWER- - Grandfather of GIS in 1969 made popular overlays for analysis and decision making- no computers Information Sys...

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  • November 10, 2024
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Advanced GIS Exam 1 Study Guide Solutions


John Snow - ANSWER✔✔-English Physician, used GIS to locate Cholera outbreaks by contaminated wells

1854-1855


-GIS on paper maps


Ian McHarg - ANSWER✔✔-1920-2001 - Grandfather of GIS


in 1969 made popular overlays for analysis and decision making- no computers


Information System - ANSWER✔✔-set process, executed on data to produce information that is useful

for decision making or adding to knowledge


GIS Process - ANSWER✔✔-Looking at process flow helps to build understanding of term


Data Acquisition, data processing, information outout


Data Processing - ANSWER✔✔-Preprocessing, data management, Spatial analysis and manipulation


Spatial analysis and manipulation - ANSWER✔✔-distinguishing characteristics of GIS


Data types - ANSWER✔✔-words, numbers (Regular or Integer), dates and media


specific data type - ANSWER✔✔-Word- stored in text


Numbers - short ( 32,768) Long real (2,147,483,563) Float (3.4 E 38) Double (2.2 E 308)


Bit - ANSWER✔✔-Smallest piece of information on the computer


stored as 0 or 1


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1 byte - ANSWER✔✔-8 bits


1 kb - ANSWER✔✔-1024 bytes


Byte only allows numbers 0-255


1 md - ANSWER✔✔-1024 kb


1 gb - ANSWER✔✔-1024 MB


1 tb - ANSWER✔✔-1024 GB


Binary to Decimal Conversion - ANSWER✔✔-2^7 (128) 2^6 (64) 2^5 (32) 2^4 ( 16) 2^3 (8) 2^2 (4) 2^1 (2)

2^0 (1) = 255


11110101


Remote Sensing - ANSWER✔✔-measures the properties of an object without directly touching them-

satellite, Areal Photos, Sonar, Drones


Wavelengths - ANSWER✔✔-Every surface either reflects, absorbs or transmits


Satellites - ANSWER✔✔-record strength of reflected light hitting sonar as numbers


absorb more light = lower number


reflect more light = higher number


bands - ANSWER✔✔-each band records a specific color or range of colors


Commonly used Satellites - ANSWER✔✔-SPOT, Landsat,IKONOS, MODIS, AVHRR




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