Flashcard Set Preview
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| 1 |
What are the stages in the data capture project
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planning, preparation , obtain data, editing, and evaluation
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| 2 |
What are the three types of data
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Base Data, derived data, interpreted data
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Base DataDerived datainterpretation data
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primary source data with little modificationComes from base data through processinga combo...
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Key principlesFundamental trade off between
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Clear plan, adequate resources, appropriate funding and sufficient timeQuality, speed and price
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two different strategies resource options
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incremental or all at onceeither in house or external agency
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how do you acquire data
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by creating it, buying it, not in a usable form
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preProcessing
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done before general use: projecting and transforming data, edge matching, generalization, rubber...
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Edge matchingRubber sheeting
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when data has been digitized by map sheetuses a number of control points to move from a distorted...
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Generalizing
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to make data less complex by reclassifying to more general valuesfor example: douglas fir and...
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What are three generalization processes?
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-replace pair of coordinates with average position-take out a point that does not change the...
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Vector to rasterRaster to vector
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the raster cell center closest gets that attributecreate a point at the center of the cell...
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two ways vector can be rebuilt
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using four-connected or 8-connected algorithms
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| 13 |
The data stream
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the collection, processing, analysis and production
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| 14 |
Primary and secondary data
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two ways of classifying dataraster:-digital remote sensing, digital aerial photographs-scanned...
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how to collect vector datacollecting attribute data
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surveying: determining location of objects by angle and distance measurements from known locationstyping...
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