GEOG 2420 - Earth From Space Notes - Earth from Space Notes...

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Earth from Space – NotesImage Interpretation Proficiency in image interpretation comes from knowledge of and experience in three areas: oSubject oGeographic region oRemote sensing system Image interpretation: oExtraction of qualitative and quantitative information about the shape, location, structure, function, quality, condition, relationships of and between objects Visual elements of image interpretationoTone Relative brightness or colour of objects in an image Typically refers to shades of greyFundamental element for distinguishing between different targets Variation in tone allows for distinguishing between elements of shape,texture and patternsIn panchromatic photos any object will have a unique tone according to reflectance (e.g. dry sand vs. wet sand) Degree of darkness or brightness is a function of the amount of light reflected from the scene oColourHue and level of saturation

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