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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 Second image shows 240 meters width in 4
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