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calc_areas [2025/07/19 03:03] hermann [Inputs] |
calc_areas [2026/06/29 14:06] (current) chrystian Add ASPHAA reference to Calc Areas documentation |
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| Only the areas corresponding to class or categories defined in the input map header are calculated. | Only the areas corresponding to class or categories defined in the input map header are calculated. | ||
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| - | If the cell dimensions are represented using degrees, the areas in hectares and square meters becomes an approximation. All cells are always supposed to be of the same size. | ||
| The table containing the resulting area has the following format. | The table containing the resulting area has the following format. | ||
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| | "Area_In_Hectares" | Data | Real | Area of corresponding category in hectares | | | "Area_In_Hectares" | Data | Real | Area of corresponding category in hectares | | ||
| | "Area_In_Square_Meters" | Data | Real | Area of corresponding category in square meters | | | "Area_In_Square_Meters" | Data | Real | Area of corresponding category in square meters | | ||
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| + | ==== References ==== | ||
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| + | Santini, M., Taramelli, A. and Sorichetta, A., 2010: [[https://www.researchgate.net/publication/220606016_ASPHAA_A_GIS-Based_algorithm_to_calculate_cell_area_on_a_latitude-longitude_Geographic_regular_grid|ASPHAA: A GIS-Based Algorithm to Calculate Cell Area on a Latitude-Longitude (Geographic) Regular Grid]]. Transactions in GIS, 14(3), 351-377. | ||
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| ===== Internal Name ===== | ===== Internal Name ===== | ||
| CalcAreas | CalcAreas | ||
| + | ===== Usage examples ===== | ||
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| + | See practical examples of this functor in [[lesson_9|Lesson 9: Working with maps and tables]] | ||