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lesson_5 [2020/02/11 20:54] hermann |
lesson_5 [2020/02/19 16:36] (current) argemiro |
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| ====LESSON 5: Implementing simple map algebra on Dinamica EGO==== | ====LESSON 5: Implementing simple map algebra on Dinamica EGO==== | ||
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| - | In this lesson we would like to demonstrate how to use Dinamica EGO to convert the values of Belo Horizonte temperature map from Celsius into Fahrenheit scale. | + | In this lesson we demonstrate how to use Dinamica EGO to convert the values of Belo Horizonte temperature map from Celsius into the Fahrenheit scale. |
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| - | The [[Calculate Map]] functor is used for map algebra: to combine and process maps, tables and constants. Inside [[Calculate Map]] it is possible to write expressions that can include arithmetic, logical and conditional elements. | + | The [[Calculate Map]] functor is for map algebra: to combine and process maps, tables and constants. Inside [[Calculate Map]] it is possible to write expressions that including arithmetic, logical and conditional elements. |
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| - | Click on the Input/Output tab, drag a [[Load Map]] to the sketch and open the ''air_temperature.tif'' file used in the previous lesson. Next, click on the Map Algebra tab, grab and place on the sketch one [[Calculate Map]] and one [[Save Map]] functor. In the [[Save Map]] functor browse to ''Guidebook_Dinamica_5\Models\Set_1\basics\1_load_save'' and write the file name ''temperature_fahrenheit.tif''. | + | Click on the Input/Output tab, drag a [[Load Map]] to the sketch and open the ''air_temperature.tif'' file used in the previous lesson. Next, click on the Map Algebra tab, grab and place on the sketch one [[Calculate Map]] and one [[Save Map]] functor. In the [[Save Map]] functor browse to ''Guidebook_Dinamica_5\Models\simple_map_algebra'' and write the file name ''temperature_fahrenheit.tif''. |
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| - | Although you won’t need it in this lesson, you might set the null value by first turning on the Null Value option on the Load Map and then setting its value to “0”. | + | Although you won’t need it in this lesson, you might set the null value by first turning on the Null Value option on the Load Map and then setting its value to a value outside the range of values represented in the map. |
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| - | Save and run the model by clicking on the run model script button on the main toolbar. After adjusting limits and choosing a suitable transformation, as shown in the previous lesson, the map will look like this: | + | Save and run the model by clicking on the run model script button on the main toolbar. After adjusting limits and choosing a suitable transformation, as in the previous lesson, the map will look like this: |
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