Lecture0010

Lecture0010 - Lecture 10. Geoprocessing and Modeling Tools...

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Geoprocessing is an integral part of GIS analysis—it encompasses any operation that creates new data from existing GIS data . An ArcGIS “model” is a collection of geoprocessing operations that allows you to visualize and automate an analysis workflow. Lecture 10. Geoprocessing and Modeling Tools Part 1
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Learning ArcGIS 9
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Geoprocessing • When used to manage GIS data, a geoprocess may be as simple as copying a feature class from one geodatabase to another, or from a CD to a folder on your local disk. Because these tasks result in the creation of new data, they are considered geoprocessing operations. • When used for analysis, a geoprocess usually involves combining two or more datasets to produce a new dataset that includes some or all of the features and attributes from the inputs.
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Geoprocessing: analysis Geoprocessing tools used for analysis typically fall into three categories: • Data extraction • Overlay • Proximity
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Geoprocessing: analysis Data extraction. Creating a new subset of features in one feature class based on the geographic extent of another feature class. Data of new subset is same as original. e.g. Clip operation.
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Overlay. Combine the layers to create a new layer that contains the data from both input layers. e.g. Union operation (OR).
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This note was uploaded on 12/15/2010 for the course SAS SAS 18 taught by Professor Weswallender during the Spring '10 term at UC Davis.

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Lecture0010 - Lecture 10. Geoprocessing and Modeling Tools...

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