3SpatialResolutionToolsPowerpnts

3SpatialResolutionToolsPowerpnts - Spatial Resolution Tools...

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Spatial Resolution Tools • Tools you use every day but take for granted • All programs use, few understand • Important for more advanced work
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Computer Screen Resolution • Image size does not match screen size • Must reduce or enlarge • Satellite image is typically 3000 rows by 2000 columns • Computer monitor screen resolution – 1024 x 768 x 256 – Columns, Rows and Pixel Depth
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3 Techniques to match image size to screen size • Image Magnification and Reduction – TM image is 3000 by 3000 – Monitor is 1024 by 768 – Must reduce TM image to see whole thing on screen – Alternative is that you see a small part of the image – Zoom in and Zoom out, but how does it work?
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Zoom Out (Image Reduction) • Image is reduced by a factor of 2 • Every other row and column in the dataset is displayed • Each pixel represent 30 meters, image shows 240 meters width in 8 pixels
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This note was uploaded on 12/21/2010 for the course GIS 4037c taught by Professor Roberts during the Spring '10 term at FAU.

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3SpatialResolutionToolsPowerpnts - Spatial Resolution Tools...

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