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concept_of_region [2020/02/17 23:27] argemiro created |
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| ===== Using the concept of region ===== | ===== Using the concept of region ===== | ||
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| - | An alternate way to solve the exercise of the previous lesson is by means of Region. This subset of functors permits division of a map into several regional maps, which can be input for separate models or submodels, whose parameters are customized for each map’s region. Let’s adapt the previous model to use the concept of regions. First open the Region Tab in the library window.\\ | + | This subset of functors permits division of a map into several regional maps, which can be input for separate models or submodels, whose parameters are customized for each map’s region. Let’s adapt the model ''Calc_forest_remaining_per_state'' (LINK) to use the concept of regions. First open the Region Tab in the library window.\\ |
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| - | These functors can be combined to produce regional maps and submodels, as well as to merge the regional maps into a single map after a processing is performed. In this lesson you will learn how to retrieve the area of the remaining forest for each state; as a result each regional map will correspond to a state area. Open the model completed in the previous lesson. Select the functors within the container //[[:Repeat]]// with the Hand tool and then drag them out of //[[:Repeat]]//.\\ | + | These functors can be combined to produce regional maps and submodels, as well as to merge the regional maps into a single map after a processing is performed. In this lesson you will learn how to retrieve the area of the remaining forest for each state; as a result each regional map will correspond to a state area. Open the model the model ''Calc_forest_remaining_per_state''. Select the functors within the container //[[:Repeat]]// with the Hand tool and then drag them out of //[[:Repeat]]//.\\ |
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| - | Finally save the model as a new file ''my_calc_forest_remaining_per_state_using_subregions.xml'' into folder Region_Lesson and run it.\\ | + | Finally save the model as a new file ''my_calc_forest_remaining_per_state_using_subregions.xml'' into folder LINK (using_concept_of_region) and run it.\\ |
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| Compare this model’s output with the result from the previous lesson. Do they match? Can you explain how this model works?\\ | Compare this model’s output with the result from the previous lesson. Do they match? Can you explain how this model works?\\ | ||
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| <note>The region approach is a helpful way to break the map into several subsets either to customize a submodel, for example to run with different parameters per country, state or county, or to optimize the memory usage as the model does not need to handle all the map cells for a specific calculation or processing, but only the cells selected from a region per time</note> | <note>The region approach is a helpful way to break the map into several subsets either to customize a submodel, for example to run with different parameters per country, state or county, or to optimize the memory usage as the model does not need to handle all the map cells for a specific calculation or processing, but only the cells selected from a region per time</note> | ||
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| - | __Now let’s move on to more advanced spatial analyses.__ | + | \\ |
| + | ===Congratulations, you have successfully completed this lesson!=== | ||
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| + | ☞[[multiple_criteria|Next Lesson]] | ||
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| + | ☞[[:guidebook_start| Back to Guidebook Start]] | ||
| - | [[tutorial:calculating_accumulated_cost_surface_and_least-cost_pathway| Next Lesson]] | ||