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Spatial Analysis with Raster Datasets - 2

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Spatial Analysis with Raster Datasets - 2

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    1. Spatial Analysis with Raster Datasets - 2 Francisco Olivera, Ph.D., P.E. Srikanth Koka Department of Civil Engineering Texas A&M University

    2. Reclassification Reclassify creates a new grid by replacing the input cell values with new output cell values. New cell values are based on new information or grouping existing values together. To reclassify, click on Spatial Analyst/Reclassify.

    3. Straight Line Distance Straight Line gives the distance from each cell in the grid to the closest source (point or line dataset). Optionally, Create Allocation and Create Direction can be used to create grids with cells representing the value of the source and direction (out of eight options) of the source, respectively. To use the straight line distance function, click on Spatial Analyst/ Distance/Straight Line.

    4. Allocation Allocation is used to allocate cells to the closest source. The source can be a point feature class or any grid or feature class. It is similar to the Straight Line Allocation function. To create an allocation grid click on Spatial Analyst/ Distance/Allocation.

    5. Cost Weighted Distance The Cost Weighted Distance function creates a grid in which each cell represents the least accumulative cost from that cell to the nearest, cheapest source (cost can be money, time, etc.). Needs a cost grid; for example: Cost raster = f(slope, landuse). To create a cost weighted distance grid, click on Spatial Analyst/Distance/Cost Weighted.

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